1. Show the non-electrolytes
I. Glucose;II. Sodium hydroxide;III. Sugar;IV. Nitrogen
A) I,III,IV
B) I,II
C) II,III
D) II,IV
E) I,IV
2. Which process happensduring the freezing of water?
I. Diminish of the volume;II. Increase of the volume;III. Volume does not change;IV. Increase of the density;V. diminish of the density
A) II,V
B) I,V
C) I,IV
D) III,IV
E) I,III
3. Which reaction does not go to the end in the solution?
A) K2SO4 + CuCl2
B) Na2S + HNO3
C) Na2SiO3 + HCl
D) K2S +CuSO4
E) Zn + H2SO4
4. Which salt makes alkali environment in the solution?
A) K2S
B) ZnCl2
C) NH4Cl
D) Al2(SO4) 3
E) CaCl2
5. There are 5 mol electrolyte, and 2 mol electrolyte decomposes into ions.Calculate.
A) 40
B) 50
C) 30
D) 10
E) 60
6. Which salt makes acidic environmentin the solution?
A) Al(NO3)3
B) Na2SiO3
C) K2S
D) K2SO4
E) CaCl2
7. There are 4 mol electrolyte, and 2mol electrolyte decomposes into ions .
Calculate.
A) 50
B) 60
C) 35
D) 89
E) 24
8. Which substances make atomic cage?
A) Si B, SiC
B) C,P,B
C) NaCl, P, S
D) HCl, N2, O2
E) H2O, P,O2
9. Which substances make molecular cage?
A) H2O, O2, CO2
B) N2, HCl, Si
C) NaCl, P, O2
D) KCl, S. Na
E) K, Fe, Na
10. There are 20 q NaOH and 180 ml water. Calculate .
A) 10
B) 15
C) 30
D) 40
E) 45
11. There are 20 q salt and 80 ml water. Calculate Ks.
A) 250
B) 360
C) 150
D) 740
E) 125
12. There are 80 q salt and 800 ml water. Calculate Ks.
A) 100
B) 340
C) 450
D) 140
E) 125
13. There are 25q salt and 100 ml water. Calculate
A) 20
B) 45
C) 35
D) 40
E) 55
14. Which salt makes alkali medium in the solution?
A) K2S
B) K2SO4
C) NH4Cl
D) NaCl
E) CaCl2
15. How many cations forms during the dissociation ofAl2S3 and HCOONa?
A) 3
B) 5
C) 2
D) 1
E) 4
16. pH =8. Calculate pOH.
A) 6
B) 5
C) 9
D) 8
E) 7
17. How many ions form during the dissociation of K3[Fe(CN) 6]?
A) 4
B) 5
C) 7
D) 6
E) 9
18. V=1l, =2 mol. Calculate the concentration C.
A) 2
B) 6
C) 8
D) 3
E) 4
19. Which substances have the stable valence electron?
A) Na,F2,Mg
B) C,P,B
C) Na,P,S
D) Cl2,N2,O2
E) Si B,C
20. Which one is complex?
A) Malachite
B) Graphite
C) Nitrogen
D) Iron
E) Sodium
21. How many molecules are there in 54 gram water?
A) 1. 806 1024
B) 1. 204 1024
C) 3. 01 1024
D) 6. 02 1024
E) 9. 03 1024
22. Kh=200, salt=50 gram. Water=?
A) 250
B) 360
C) 150
D) 740
E) 125
23. Which electrolytes are strong?
A) >30%
B) >15
C) >0. 3
D) <15
E) <30
24. salt=50 gram, water=250 ml. Calculate Kh.
A) 200
B) 300
C) 150
D) 700
E) 225
25. Which equation expresses?
A)
B)
C)
D)
E)
26. V=0. 05 l. m= 20 gram. Calculate the density.
A)
B)
C)
D)
E)
27. Water=750 gram, . Calculate the gram of salt.
A) 250
B) 300
C) 130
D) 350
E) 125
28. Which equation expresses the concentration?
A)
B)
C)
D)
E)
29. K3[Fe(CN) 6] in this compound find the coordination number.
A) 6
B) 4
C) 3
D) 5
E) 2
30. K3[Fe(CN) 6] in this compound find the ligand number.
A) 6
B) 4
C) 1
D) 3
E) 2
31. K3[Fe(CN) 6] in this compound find the central ion.
A) Fe
B) K
C) C
D) N
E) (CN) 6
32. Electron formula of X is 3s23p1 and Y is 3s23p4. Find the formula of compound.
A) X2Y3
B) XY
C) X3Y2
D) XY2
E) X2Y
33. Which elements of group make ion bond?
A) I,II and VI,VII
B) I and II
C) II and III
D) III and I
E) I and VIII
34. How many electrons are there in the NH3 molecule?
A) 6
B) 9
C) 5
D) 2
E) 1
35. How many and are there in the acetylene?
A) 3, 2
B) 1 4
C) 5 0
D) 2 3
E) 4,1
36. 200 gram water is adding to 800 gram 30 % solution. Calculate .
A) 24
B) 30
C) 37
D) 85
E) 27
37. 60 gram salt is adding to 500 gram 20 %solution. Calculate Kh
A) 400
B) 300
C) 125
D) 250
E) 470
38. Which valence of element does not connect with its group?
A) F
B) Na
C) P
D) C
E) S
39. X is the members of V group and the row number of Y is 12. Write the formula of XaYb.
A) X2Y3
B) XY
C) X2Y
D) XY2
E) XY3
40. Which type of hybridization is cause of tetrahedral complex?
A) sp3
B) sp
C) sp2
D) dsp
E) d2Sp
41. Find the oxidation state of sodium in Na3 [Co(NO2) 6]
A) +1
B) -3
C) +6
D) +5
E) -2
42. Which type of hybridization are cause of linear complex?
A) sp
B) sp2
C) d2Sp3
D) sp3
E) dsp
43. Which elements are both in oxidizing and reducing state?
A) Fe2+,Cr3+
B) Al3+ ,Cu2+
C) Cl-,S2-
D) Zn2+,,Mn2+
E) Cl-,N3-
44. Electron formula of A is 3s23p1 and B is 3s23p4. Find the formula of compound.
A) A2B3
B) AB
C) A3B2
D) AB2
E) A2B
45. Which is false about oxygen and sulfur?
A) Both can form covalent bonds with metals
B) Both exist in diatomic state
C) Both can exhibit O. N of -2 as well as +2
D) Both can form covalent hydrides
E) Both are in VI group
46. Which kind of environment are created by FeCl3?
A) acidic
B) alkali
C) neutral
D) acidic and alkali
E) alkali and neutral
47. Al2S3 + H2O = X + Al(OH) 3
In this reaction X is product of reaction. Which properties are correct for X?
A) Colorless gas, well dissolved in water, smells of rotten eggs
B) Colorful gas, dissolved in water
C) Colorless gas, not dissolved in water
D) Orange –red gas, well dissolved in water
E) Greenish-yellow crystal, well dissolved in water, has a specific smell
48. Substances:Products of the interaction with metal:
H2SO4 diluteH2
Cu(NO3) 2Cu
Determine the metal.
I. Hg;II. Fe;III. Ag;IV. Mg
A) II, IV
B) I, II
C) I, IV
D) II, III
E) III, VI
49. Which elements are created main group?
A) s, p
B) s
C) d
D) s, p, d
E) s,d
50. Which parts are the same in the isotope?
A) protons
B) neutrons
C) electrons
D) protons and neutrons
E) electrons and neutrons
51. Which element have line structure?
A) CO2
B) NH3
C) C2H6
D) CH4
E) H2O
52. Which compound has covalent bond?
A) NH3
B) AlCl3
C) Ca(OH) 2
D) SiO2
E) (H2O) n
53. How many ions appear the results of dissociation of AlCl3?
A) 4
B) 3
C) 5
D) 2
E) 1
54. . There are 1000 ions. Calculate n.
A) 28
B) 39
C) 45
D) 21
E) 15
55. 200 gr 40% and 300gr20% solutions are mixed. Calculate last.
A) 28
B) 63
C) 55
D) 32
E) 12
56. V=0. 5 l. Calculate concentration.
A) 0. 1
B) 0. 3
C) 0. 5
D) 0. 2
E) 1. 5
57. In this 500 gr 20% solution calculate ks.
A) 250
B) 300
C) 550
D) 123
E) 150
58. Which salt are dissociated at one stage?
A) K2S
B) KHSO4
C) Mg(OH) Cl
D) NaH2PO4
E) Ca(OH) Cl
59. Which precipitation has blue color?
A) Cu(OH) 2
B) AL(OH) 3
C) Mg(OH) 2
D) Ag3PO4
E) Ca(OH) 2
60. In which line all elements react with sulfur?
A) F2 , Hg ,C
B) C , Au , Na
C) Na ,Hg , Pt
D) F2 , Cl2 , J2
E) J2, Na, C
61. Which reactions are not correct?
I. S +HNO3dilute→ H2SO4 + NO
II. S + O2 → SO3
III. S + NaOH → Na2S + Na2SO4 + H2O
IV. S + H2SO4 con → SO2 + H2O
A) II,III
B) II , IV
C) I , III
D) III ,V I
E) I,VI
62. Which element has 5 valance electrons?
A) P
B) C
C) Na
D) F2 ,
E) Mg
63. PH3 gas is
A) Acidic
B) Basic
C) Neutral
D) Amphoteric
E) Both acidic and Basic
64. PCl5 is prepared by the action of Cl2 on
A) P2O5
B) P2O3
C) H3PO5
D) PCl3
E) non
65. Phosphorus pentaoxide (P2O5) cannot be used to dry
A) NH3
B) N2
C) H2S
D) SO2
E) CO2
66. Sodium nitrate (NaNO3) decomposes into …+O2
A) NaNO2
B) NH3 + Na
C) NO2 +Na
D) N2O+Na
E) N3O+Na
67. In the action of HNO3 on metals, the evolution of NO2 is favored by
A) Conc. HNO3
B) Dilute HNO3
C) Very dilute HNO3
D) Fuming HNO3
E) non
68. Find the element of VI group
A) Te
B) C
C) P
D) F2
E) Na
69. Which reaction is oxidation-reduction reaction?
A) Ca+SCaS
B) SO3+H2OH2SO4
C) HCl+NaOHNaCl+H2O
D) CaSO3CaO+CO2
E) Cu(OH) 2CuO+H2O
70. Which once is non-metal?
A) Br
B) Be
C) Ba
D) Mn
E) Mg
71. Which line consists of stable valance elements?
A) Na, Ba
B) F, Cl
C) P, K
D) Fe, H
E) Cu, Zn
72. Which once are true?
A) CaHPO4
B) CaHSO4
C) CaHCO3
D) Ca(CO3) 2
E) CaH2PO4
73. Which substances make ion cage?
A) NaCl, AlP, MgS
B) C,P,B
C) Si B, SiC
D) HCl, N2, O2
E) H2O, P,O2
74. How many anions forms during the dissociation of Al2S3 and HCOONa?
A) 4
B) 5
C) 2
D) 1
E) 3
75. K4[Fe(CN) 6] in this compound find the coordination number.
A) 6
B) 3
C) 1
D) 4
E) 2
76. Electron formula of X is 3s23p1. Find the formula of this substance.
A) Al
B) Na
C) Mg
D) Ca
E) Ba
77. Electron formula of Y is 3s23p4. Find the formula of this substance.
A) S
B) O2
C) P
D) C
E) Ba
78. Which elements of group make covalent bond?
A) IV and VI,
B) I and II
C) II and III
D) III and I
E) I and VIII
79. How many electrons are there in the CO2 molecule?
A) 8
B) 9
C) 5
D) 2
E) 1
80. How many and are there in the methane?
A) 4, 0
B) 1 4
C) 5 0
D) 2 3
E) 4,1
81. Electron formula of X is 3s23p2. Find the formula of this substance.
A) Si
B) Na
C) Mg
D) Ca
E) Ba
82. Which valence of element does not connect with its group?
A) Au
B) Na
C) P
D) C
E) S
83. Which elements are both in oxidizing and reducing state?
A) Fe2+
B) Al3+
C) Cl-
D) Zn2+,
E) N3-
84. Which element is in oxidizing state?
A) Mg2+
B) Cu1+
C) Cl-,
D) S2-
E) N3-
85. Find the oxidation state of nitrogen in HNO3
A) +5
B) -5
C) +4
D) -4
E) +3
86. Which elements are created addition group?
A) d
B) s
C) s, p
D) s, p, d
E) s,d
87. Substances:
H2SO4 dilute +X
Cu(NO3) 2+ X
Determine the metal.
I. Hg;II. Fe;III. Ag;IV. Mg
A) II, IV
B) I, II
C) I, IV
D) II, III
E) III, VI
88. Substance:Product of the interaction with metal:
HNO3diluteNO
Determine the metal.
I. Hg;II. Fe;III. Cu;IV. Mg;
A) I, III
B) I, II
C) I, IV
D) II, III
E) III, VI
89. Which particles are the same in the isotone?
A) protons
B) neutrons
C) neutrons and electrons
D) protons and neutrons
E) electrons
90. 400 gr 20% and 200 gr20% solutions are mixed. Calculate last.
A) 20
B) 60
C) 50
D) 35
E) 12
91. Which salt are dissociated at 3 stages?
A) NaH2PO4
B) KHSO4
C) Mg(OH) Cl
D) K2S
E) Ca(OH) Cl
92. Calculate Ks
A) 250
B) 600
C) 150
D) 350
E) 120
93. Which precipitation has black color?
A) CuS
B) AL(OH) 3
C) Mg(OH) 2
D) Ag3PO4
E) Ca(OH) 2
94. In which line all elements do not react with hydrogen?
A) Al, Be
B) C , Na
C) Na , Pt
D) F2 , Cl2
E) J2, Na
95. How many and are there in the CO2?
A) 2, 2
B) 1 4
C) 5 0
D) 2 3
E) 4,1
96. Which element is in reducing state?
A) Cl-
B) Al3+
C) Fe2+
D) Zn2+,
E) N3+
97. Which metals form NO2 react with HNO3 (conc) ?
A) Cu,Hg
B) K , Na
C) Na , Ca
D) Fe, Be
E) Li, Na
98. In the action of HNO3 on metals, the evolution of NH3 is favored by
A) Very dilute HNO3
B) Dilute HNO3
C) Conc. HNO3
D) FumingHNO3
E) non
99. Substances:Products of the interaction with metal:
H2SO4diluteH2
Cu(NO3) 2Cu
Determine the metal.
I. Hg;II. Fe;III. Cu;IV. Mg
A) II, IV
B) I, II
C) I, IV
D) II, III
E) III, VI
100. Which precipitation has yellow color?
A) Ag3PO4
B) Al(OH) 3
C)Mg(OH) 2
D) Cu(OH) 2
E) Ca(OH) 2
101. Which substances make non-polar covalent bond?
A) H2, N2, O2
B) C, P, B
C) Si B, SiC
D) NaCl, AlP, MgS
E) H2O, P,O2
102. Which substances make polar covalent bond ?
A) HCl, N2O, SO2
B) C, P, B
C) Si B, SiC
D) Na, Al, MgS
E) H2O, P,O2
103. Find the oxidation state of sulfur in H2SO4
A) +6
B) -5
C) +4
D) -4
E) +3
104. Which salt are dissociated at 2 stages?
A) KHSO4
B)NaH2PO4
C) Mg(OH) 2
D) K2S
E) Al(OH) 2Cl
105. Calculate
A) 20
B) 60
C) 15
D) 30
E) 10
106. Which metals form SO2 react withH2SO4(conc) ?
A) Cu, Ag
B) K , Na
C) Na , Ca
D) Fe, Be
E) Li, Na
107. Which metal forms peroxide react with oxygen?
A) Na
B) K
C) Ca
D) Be
E) Li
108. Which mineral is called Norway curd?
A) Ca(NO3) 2
B) KNO3
C) NaNO3
D) Mg (NO3)
E) LiNO3
109. Which compound decomposes into X2O+NO2+O2
A) LiNO3
B) KNO3
C) NaNO3
D) Mg (NO3) 2
E) Ca(NO3) 2
110. Which metals form NO react with HNO3(Dilute) ?
A) Cu, Hg
B) K , Na
C) Na , Ca
D) Fe, Be
E) Li, Na
111. Which once is precipitation?
A) Cu(OH) 2
B) KNO3
C)NaH2PO4
D)K2S
E) Al(OH) 2Cl
112. How many ions appear as the result of dissociation of FeCl3?
A) 4
B) 3
C) 5
D) 2
E) 1
113. Which metal forms superoxide react with O2?
A) K
B) Na
C) Mg
D) Ca
E) Ba
114. Water=600 gram, . Calculate the gram of salt.
A) 400
B) 300
C) 130
D) 350
E) 125
115. Find the gram of 0. 5 NaOH. Mr(NaOH) =40
A) 20
B) 30
C) 12
D) 50
E) 25
116. Which electrolyte are called weak?
A)
B) >15
C) >30%
D) <15
E) <30
117. Which elements of group can form non-covalent bond?
A) VII
B) I
C) III
D) II
E) VIII
118. Which metal does not react with HNO3?
A) Au
B) Na
C) K
D) Cu
E) Ag
119. pOH=8 . Find pH
A) 6
B) 3
C) 2
D) 5
E) 7
120. Which elements are amphoteric?
A) Zn, Be
B) Al, Na
C) C, S
D) K, P
E) Li, S
121. Which element is stronger electronegative element?
A) F
B) Cl
C) Br
D) J
E) As
122. Substances:Products of the interaction with metal:
H2SO4concSO2
Determine the metal.
I HgII FeIII CuIVMg
A) I,III
B) I, II
C) I, IV
D) II, III
E) III, VI
123. How many donor electron is there in the CO?
A) 4
B) 2
C) 5
D) 6
E) 3
124. Which compound decomposes into XO+NO2+O2
A) Cu(NO3) 2
B) KNO3
C) NaNO3
D) Mg (NO3) 2
E) Ca(NO3) 2
125. Find the coefficient of the oxidant in the reaction: Fe(CrO2)2+Na2CO3+O2→Fe2O3+Na2CrO4+CO2
A) 7
B) 6
C) 4
D) 3
E) 5
126. Find the sum of the coefficients of reducing agent and water in the following reaction:Al+KClO4+H2SO4→Al2(SO4) 3+KCl+H2O
A) 20
B) 10
C) 16
D) 11
E) 15
127. Find the coefficient of water in the reaction:
KMnO4+Na2SO3+H2SO4 →MnSO4+K2SO4+Na2SO4+H2O
A) 3
B) 4
C) 5
D) 6
E) 1
128. Which element has the highest oxidation state?
A) …2s22p5
B) …4s24p5
C) …5s25p5
D) …3s23p5
E) …2s22p4
129. Find the coefficient of the reducing agent:PbS+HNO3→S+Pb(NO3) 2+NO+H2O
A) 3
B) 5
C) 4
D) 2
E) 6
130. Find the sum of the coefficients of the oxidant and reducing agents in the reaction:H2S+KMnO4+H2SO4→S+MnO2+K2SO4+H2O
A) 5
B) 7
C) 4
D) 8
E) 11
131. In which variant, given ions or compounds are also oxidizing agent and reducing agent?
A) Fe+2,SO2
B) Cl2,O2
C) S-2,C-4
D) H2,Ca+2
E) Mn,Cl2
132. Find the coefficient of the reducing agent: Cu2S+HNO3→Cu(NO3) 2+SO2+NO+H2O
A) 3
B) 8
C) 6
D) 4
E) 5
133. In which variant are given only oxidants?
A) Al+3,CrO3,KMnO4
B)K,MnO2,C
C) HNO3,HNO2,NH3
D) KClO3,H2SO4,H2SO3
E) Fe+3,Na,CO
134. In reaction the atoms of which element are oxidizing? 2KNO3+S+3C→K2S+3CO2+N2
A) only carbon
B) only nitrogen
C) sulfur, nitrogen
D) only sulfur
E) sulfur, carbon
135. Which system showthe oxidation process?
A) H2O2→O2
B) SO2→O2
C) CuO→CuSO4
D) HClO4→Cl2O7
E) HNO3→NO2
136. Find the coefficient of water in the reaction:K2Cr2O7+FeSO4+H2SO4→Cr2(SO4) 3+Fe2(SO4) 3+K2SO4+H2O
A) 7
B) 1
C) 8
D) 6
E) 3
137. Find the coefficient of the oxidant in the reaction:HCl+CrO3→Cl2+CrCl3+H2O
A) 2
B) 4
C) 3
D) 5
E) 1
138. Which compounds are obtained by the electrolyze of the sodium-sulfate solution, and which compounds exist in solution near electrodes?
A) H2,NaOH,O2,H2SO4
B) H2,O2,NaOH
C) H2,O2,H2SO4
D) H2,NaOH,H2SO4
E) O2,NaOH,H2SO4
139. The electrolyze of which compound is match up with the given process: 2H2O→2H2+O2
A) K2SO4
B) CuCl2
C) AgNO3
D) Hg(NO3) 2
E) NaCl
140. By electrolyze of the water solutionof AgNO3 on cathode were obtained 21,6 gr of metal. How much gas were obtained on anode in normal condition? Ar(Ag) =108
A) 1,12
B) 2,4
C) 0,6
D) 3,0
E) 4,8
141. In which group of salts by the electrolyze of water solution of all salts in cathode obtained only hydrogen?
A) Na2CO3,K2SO4,CaCl2
B) AgNO3,Na2SO4,FeCl3
C)KCl,ZnCl2,CuSO4
D) Zn(NO) 3,Na2S,HgCl2
E)Cu(NO3) 2,K2S,FeSO4
142. In which group of salts by their electrolyze of solution on cathode obtained only metal?
A) AgNO3,Hg(NO3) 2
B) Na3PO4,AuCl3
C) AlCl3,KNO3
D) ZnCl2,Ca(NO3) 2
E) Mg(NO3) 2,CuSO4
143. By the electrolyze of solution which consist of 16 gr CuSO4how many Cu will obtained on cathode?Mr(CuSO4) =160
A) 6,4
B) 12
C) 8
D) 64
E) 32
144. In which group by electrolyze of water solution of compounds decomposed water?
A) KNO3,KF,Ca(NO3)2
B) NaNO3,H2SO4,KCl
C) NaCl,NaNO3,H2SO4
D) CuCl2,ZnSO4,KOH
E) NaNO3,ZnCl2,H2SO4
145. By electrolyze of solution of CaCl2 which substances will obtain in solution?
A) Ca(OH) 2
B) CaO
C) HCl
D) CaCl2
E) Ca
146. By interaction of Fe with which metal it corrodes more?
A) Ag
B) Mg
C) Al
D) Zn
E) Ca
147. By electrolyze of 4 mole solution of NaCl how many liters of chlorine formed?
A) 44,8
B) 33,6
C) 11,2
D) 22,4
E) 5. 6
148. By interaction with what metal,Fe is not corrode?
A) Zn
B) Ag
C) Hg
D) Pb
E) Cu
149. By electrolyze of 6 mole solution of NaCl how many liters of chlorine formed?
A) 67,2
B) 33,6
C) 11,2
D) 22,4
E) 5. 6
150. What formula is determine the rate of corrosion?
A) v=∆m/s∆t
B) v=S/m∆t
C) v=S∆t/m
D) v=m-1/S∆t
E) v=m/∆t
151. Show the anode cover protection of metals from electrochemical corrosion?
A) Tin covered by Zn
B) Al covered by Fe
C) Mg covered by tin
D) Al covered by tin
E)Mg covered by Zn
152. Show the reaction which occur in charging of lead accumulators?
A) 2PbSO4+2H2O→Pb+PbO2+2H2SO4
B) PbSO4 -2e-+2H2O→ PbO2+4H++SO4-2
C) PbSO4+2e-→Pb+SO4-2
D) Pb+PbO2+2H2SO4→2PbSO4+2H2O
E) PbSO4→Pb+2+SO4-2
153. Show the anode cover protection of metals from electrochemical corrosion?
A) Tin covered by Zn
B) Mg covered by Zn
C) Al covered by Fe
D) Mg covered by tin
E) Fe covered by Ni
154. Which reaction shows the industrial production of Ca?
A) CaCl2 (electrolyze) →
B) CaO+H2→
C) CaO+C→
D) CaCl2+H2O(electr) →
E) Ca(NO3) 2→
155. Which compounds are used in the production of cement?
I. Al2O3∙2SiO2∙2H2OII. CaCO3III. Na2CO3
A) I,II
B) I,III
C) I,II,III
D) I
E) II
156. What reaction show the production of salt which called “water glass”?
A) SiO2+2NaOH→
B) SiO2+CaCO3→
C) SiO2+CaO→
D) Na2SiO3+H2O+CO2→
E) Na2SiO3+CaCl2
157. Which substance is monomer of organic glass?
A) methyl methacrylate
B) ethyl acrylate
C) methyl acrylate
D) acryl acid
E) methacrylate acid
158. Which ions are source of temporary and permanent hardness of water?
A) Mg+2,Ca+2,HCO3-,SO4-2
B) Mg+2,Ca+2,SO4-2 ,CO3-2
C) Mg+2,Ca+2,HCO3-,CO3-2
D) K+,Ca+2,HCO3-,CO3- 2
E) Na+,Ca+2,HCO3-,SO4-2
159. Show the formula of crystal glass?
A) K2O∙PbO∙6SiO2
B) K2O∙CaO ∙6SiO2
C)SiO2
D) Na2O∙CaO ∙6SiO2
E)Na2O∙6SiO2
160. The hydrogen which obtained by the reaction of Ca hydride with water,isburned. In this burning obtained 18 gr of water. Find the mass of CaH2 which used in this experiment? Mr(CaH2) =42
A) 21
B) 10,5
C) 42
D) 11,5
E) 16
161. What is the source for preparation of aluminate cement?
I. Al2O3∙nH2O∙CaCO3II. Al2O3∙SiO2III. Al2O3∙Fe2O3
A) I
B) II
C) I,III
D) III
E) II,III
162. Which substances are used for production of refractory glass?
I. Na2CO3II. K2CO3III. CaCO3IV. SiO2
A) II,III,IV
B) III,IV
C) I,II
D) I,III
E) II,III
163. Which ions are form the temporary hardness of water?
A) Mg+2,Ca+2,HCO3-
B) Mg+2,Na+, SO4-2
C)K+,Ca+2,Cl-
D) K+,Ca+2, HCO3-
E) Mg+2,Ca+2,PO4-3
164. Which formula show the mathematical definition of hardness of water?
A) C=m/EV
B) C=m/V
C) C=V/m
D) C=m/E
E) C=m/MV
165. Determine X,Y,Z?
X NaOH+H2O→Na2SiO3 CO2+H2O→Y SiO2,t→Z
XYZ
A) SiNa2CO3Na2SiO3
B) SiH2SiO3Na2SiO3
C) SiNa2CO3CO
D) SiO2H2SiO3Si
E) SiO2H2SiO3Na2SiO3
166. In the reaction of silicon dioxide with 1,5 mole of carbon how many grams of silicon was obtained?
A) 21
B) 10,5
C) 42
D) 23
E) 20
167. Which step shows the reaction of hydration of lime?
CaCl21→CaCO3 2→CaO 3→Ca(OH) 24→CaCO35→Ca(NO3) 2
A) 3
B) 4
C) 5
D) 2
E) 1
168. How many gram of alabaster could obtained from 688 kg of natural gypsum by 80% yield?
A) 464
B) 580
C) 232
D) 704
E) 240
169. Show the products of the reaction of calcium carbide with water?
A) C2H2,Ca(OH)2
B) CO2,Ca(HCO3)2
C) CH4,CH2O
D) C2H6,CaO
E) CH4,Ca(OH)2
170. Silicon react with?
A) F2,NaOH
B) H2SO4,Cl2
C) P2O5,NaOH
D) Br2,H3PO4
E) HF,HNO3
171. The solution of which substance is called silicate glue?
A) Na2SO3
B) CaSiO3
C) NaHSiO3
D) H2SiO3
E) Mg2SiO4
172. Crystal glass formed by the melting of…
A) K2CO3,PbO,SiO2
B) Na2CO3,K2CO3,SiO2
C) Na2CO3,PbO,SiO2
D) K2CO3,CaCO3,SiO2
E)Na2CO3,CaCO3,SiO2
173. Show the formula of windowpane(ordinary glass) ?
A) Na2O∙CaO∙6SiO2
B) Na2O∙K2O ∙SiO2
C) Na2O∙CaO∙4H2O
D) K2O∙PbO∙6SiO2
E) Na2O∙K2O ∙4SiO2
174. Show the reaction of removal of temporary hardness of water?
1-Ca(HCO3) 2t→
2-Ca(HCO3) 2+HCl→
3-Mg(HCO3) 2+Na2CO3
4-Ca(HCO3) 2+NaHCO3→
5-Ca(HCO3) 2+Ca(OH) 2
A) 1,3,5
B) 1,3
C) only 1
D) 3,4,5
E) 1,2
175. Show the production method of colloid solution?
A) solving
B) dispersion
C) precipitation
D) sublimation
E) vaporization
176. Which compounds are forming the permanent hardness of water?
A) CaSO4,MgCl2
B) Ca(HCO3) 2,Mg(HCO3) 2
C) Ca(HCO3) 2,Mg(NO3) 2
D) CaCl2,NaHCO3
E) Na2SO4,MgCl2
177. Show the step of production of silicate glue?
SiO2+KOH1→K2SiO3+HCl2→H2SiO3t3→SiO3+HF4→SiF4+HF5→H2[SiF6]
A) 1
B) 2
C) 3
D) 4
E) 5
178. Determine the size of particles in colloid solutions (in nm) ?
A) 1-100
B) >1
C) <100
D) <150
E) >0,1
179. Which compounds are formed the temporary hardness of water?
A) Ca(HCO3)2,Mg(HCO3)2
B) CaCl2,NaHCO3
C) CaSO4,MgCl2
D) CaCl2,NaHCO3
E) Na2SO4,MgCl2
180. 200 gram of CaCO3 react with 100 gram 36,5% HCl. How many liters CO2 is formed in normal conditions?Mr(CaCO3) =100,Mr(HCl) =36,5
A) 11,2
B) 5,6
C) 22,4
D) 33,6
E) 44,8
181. Show the formula of whitening lime?
A) CaCl(ClO)
B) Ca(ClO2) 2
C) MgCl(ClO)
D) Mg(ClO) 2
E) Ca(HCO3) 2
182. Show natural minerals of silicon?
I. SiO2II. H2SiO3III. Al2O3∙2SiO2∙2H2OIV. K2O∙Al2O3∙6SiO2
A) I,III,IV
B) I,II
C) II,IV
D) III,IV
E) II,III
183. Production of Si in laboratory and industry?
I. 2C+SiO2t→II. Cu+SiO2t→III. Mg+SiO2t→IV. CaO+SiO2→
A) I,III
B) I,IV
C) II,IV
D) III,IV
E) II,III
184. 84 gram of CaH2 react with water. How many liters of gas is produced in normal condition?Mr(CaH2) =42
A) 8,96
B) 11,2
C) 0,896
D) 22,4
E) 4,48
185. Which substance is taken more than others in production of windowpane(ordinary glass) ?
A) SiO2
B) CaCO3
C) CaSiO3
D) Na2CO3
E) K2CO3
186. Show the consisting of following glasses:ordinary,crystal,quartz?
I. SiO2
II. Na2O∙Al2O3∙2SiO2
III. K2O∙CaO∙6SiO2
IV. K2O∙PbO∙6SiO2
V. Na2O∙CaO∙6SiO2
A) I,IV,V
B) I,II,III,IV
C) V,II,IV,I
D) II,III,IV
E) I,II,IV
187. The measurement of water hardness?
A) mg-ekv/l
B) mg/lC
C) ekv/l
D) kg/l
E) mg-ekv/mol
188. How many grams of Si will produced in the reaction of 2,5 mole of carbon with SiO2?Mr(Si) =28
A) 35
B) 25
C) 11,2
D) 23
E) 31
189. In which produced the alabaster?
A) 2(CaSO4∙2H2O) t→(CaSO4) 2∙H2O+3H2O
B) (CaSO4) 2∙H2O+3H2Ot→2(CaSO4∙2H2O)
C) CaSO4+2H2O→CaSO4∙2H2O
D) CaSO4∙2H2O→CaSO4+2H2O
E) CaSO4∙2H2O→CaSO4∙H2O+H2O
190. If the homologue of benzene has 12 atoms of hydrogen, determine the number of carbon molecules?
A) 7
B) 10
C) 9
D) 8
E) 11
191. In which reaction the product is alkene?
A) C4H10t→
B)C4H8+H2→
C) C2H5Cl+Na→
D) C2H5NH2+HCl→
E) C2H5OH+HCl→
192. Determinethe average molecular weight of polyethylene if the degree of polymerization is 2000?Mr(C2H4) =28
A) 56000
B) 20000
C) 56
D) 30000
E) 560
193. Show the mathematical definition of equivalent law?
A) m1/m2=m’ekv/m’’ekv
B) E=hv
C) E=E2-E1
D) N=2n2
E) λ=h/mv
194. 0,36 gr of metal is burned with oxygen and produced 0,68 gr of oxide ,then find the equivalent mass of metal?
A) 9
B) 5
C) 10
D) 8
E) 3
195. In the reaction of Al with 0,98 gr acid in normal conditions produced 224 ml hydrogen gas. Find the equivalent mass of acid?
A) 49
B) 98
C) 36
D) 63
E) 17
196. In the reaction of Fe with S produced 132 gr FeS. How many atoms of Fe participated in reaction?Mr(FeS) =88
A) 9,03×1023
B) 6,02×1023
C) 1,204×1024
D) 1,204×1023
E) 1,806×1024
197. The mass of the 2,24 l gas is 4,4 gr,the find the relative density of gas by hydrogen?
A) 22
B) 16
C) 20
D) 25
E) 44
198. Find the equivalent mass of H3PO4 in the reaction ?Mr(H3PO4) =98
H3PO4+2NaOH→Na2HPO4+2H2O
A) 49
B) 98
C) 60
D) 50
E) 9,8
199. In the following redox reaction find the equivalent mass of KMnO4?Mr(KMnO4) =158
2KMnO4+16HCl→2KCl+5Cl2+2MnCl2+8H2O
A) 158/5
B) 158/7
C) 158/2
D) 158/3
E) 158/6
200.Which compounds contains only ionic bond?
A) KBr, NaF, BaCl2, ZnCl2
B) NaCl, NH3, H2, BaCl2
C) SO2, MgCl2, CaO, NO
D) H2S, NaF, CO2, KBr
E) N2, CaS, HCl, CO
201. What kind of bonds contains NaNO3?
A) Ionic və polar covalent
B) Ionic
C) Covalent
D) Nonpolar covalent
E) Metallic
202. Show correct van’t-Hoff equation.
A)
B)
C)
D)
E)
203. What is the kinetic equation for the A2+B2 =2AB reaction?
A) v = K[A2][B2]
B) v = K[A]2
C) v = K[A2]2[B2]2
D) v = K[A2]2[B]
E) v = K[A2]3[B2]2
204. Colloidal solution is. . . .
A) Particles have a diameter of between approximately 1 and 100 nanometers
B) Particles have a diameter of between approximately 0. 1 and 1 nanometers
C) Particles have a diameter more than 100 nm
D) Particles have a diameter less than 100 nm
E) Particles have a diameter of between approximately 1 and 1000 nanometers
205. True solution is. . . .
A) Particles have a diameter less than 1 nm
B) Particles have a diameter of between approximately 1 and 100 nanometers
C) Particles have a diameter less than 100 nm
D) Particles have a diameter of between approximately 0. 1 and 1 nanometers
E) Particles have a diameter more than 100 nm
206. When increasing temperature solubility of salts are…
A) Increase
B) Decrease
C) Not change
D) Decomposes
E) Increases then decreases
207. Solubility coefficient is the….
A) Amount of solute dissolved in 1000 ml solvent
B) Amount of solute dissolved in 1000 g solvent
C) Amount of solute dissolved in 100 ml solvent
D) Amount of solute dissolved in 1 l solvent
E) Amount of solute dissolved in 100 g solvent
208. Show correct products of Cu(NO3) 2 solution electrolysis.
A) Cu + O2 +HNO3
B) Cu+H2 +HNO3
C) H2+ O2 +HNO3
D) Cu(OH) 2+H2 +HNO3
E) Cu + O2 +NO2
209. Which equations show Normality of solutions?
A) C=
B) C=
C) Cn =
D) Cn =
E) Cn =
210. Which equations show Molarity of solutions?
A) CM=
B) CM =
C) CM=
D) CM=
E) CM =
211. Which equations show Molality of solutions?
A) =
B) =
C) =
D) =
E) =
212. Which equation is the correct definition of Faraday’s second rule?
A) m =
B) m =
C) m =
D) m =
E) m = KIt
213. Show correct products obtained on cathode of FeSO4 solution electrolysis.
A) Fe+H2
B) Fe(OH) 2
C) O2
D) O2 + H2SO4
E) Fe
214. Show the correct salt which products of its solutions are only water
A) Na2SO4
B) NiCI2
C) MgCI2
D) CuSO4
E) Cu(NO3) 2
215. Which acid reacts with SiO2?
A) HF
B) H2SO4(conc. )
C) H3PO4(conc. )
D) HNO3
E) HBr
216. Show only weak electrolytes.
A) CH3COOH, H2SiO3, H2SO3
B) H2CO3, HNO3, H2SO4
C) NH4OH, CH3COOH, HCl
D) HNO3, H2SO4, H3PO4
E) H2CO3, CH3COOH, H2S
217. Which factor doesn’t affect to Dissociation degree?
A) Pressure
B) Temperature
C) Nature of solvent
D) Concentration of solution
E) Amount of solvent
218. Which reaction doesn’t finished?
A) KNO3 + NaCl → KCl + NaNO3
B) CuCl2 + 2KOH → Cu(OH) 2 + 2KCl
C) K2CO3 + NaCl → 2KCl + CO2 + H2O
D) AgNO3 + NaCl → AgCl + NaNO3
E) Zn + 2HCl → ZnCl2 → H2
219. Which statement is incorrect?
A) Chemical energy transform into to electricity at electrolysis
B) Electricity transform into to chemical energy at electrolysis
C) Electrolysis is the oxidation-reduction process
D) Reduction occurs on cathode and oxidation occurs on anod
E) Electrolysis used for production salts
220. Find oxidation coefficient of oxidizing agent inNaCrO2+PbO2+NaOH+H2ONa2CrO4+Na2[Pb(OH) 4
A) 3
B) 2
C) 5
D) 8
E) 12
221. What is the product electrolysis process of solution of Na2SO4 və KNO3
A) H2, O2
B) Na, K, H2
C) H2, NO2
D) Na, O2, SO2
E) SO2, Na, K
222. Which compounds are obtained from solution of CuSO4at electrolysis?
A) Cu və O2
B) H2 və O2
C) H2 və SO3
D) Cu və SO2
E) H2 və Cu
223. Where electrolysis doesn’t use?
A) In steel production
B) In production of active metals
C) Coatings of metals
D) Cleaning of metals
E) Production of H2 and O2 gases
224. How many molecules have in 160 g NaOH.
A) 4 g/mol
B) 3 g/mol
C) 0. 5 g/mol
D) 1 g/mol
E) 7 g/mol
225. What compounds mass is corresponds to Avogadro’s number?
A) 17g NH3
B) 36 g H2O
C) 32 g SO2
D) 49 g H2SO4
E) 31 g H3PO4
226. Which reactions are oxidation-reduction reactions?
1-MnO2 + 4HCI MnCI2+ CI2
2-2Pb(NO3) 2 2PbO +2NO2+ O2
3-AgNO3 + NaCI AgCI +NaNO3
4-(NH4) 2Cr2O7 Cr2O3+ N2 + 4H2O
A) 1,2,4
B) 2,4
C) 1,2
D) 1,4
E) 4
227. Which reactions are correct?
A) Cr2O3+ NaOH NaCrO2+ H2O
B) AI2O3+ NaOH AI(OH) 3+ Na2O
C) Fe(OH) 3+ NaOH NaFeO3+ H2O
D) AI + 6NaOH + H2O AI(OH) 3+ 3Na2O + H2O
E) Cr2O3+ 4NaOH 2Na2CrO4 + 2H2O
228. Which elements maximum oxidation state less than group number?
A) O2 və F2
B) N2 və Cu
C) H2 və CI2
D)Br və Ar
E) N2 və P
229. Find coefficient of oxidizing agent in
FeSO4 + K2Cr2O7+ H2SO4K2SO4+ Cr2(SO4) 3 +Fe2(SO4) 3+ H2O.
A) 1
B) 4
C) 5
D) 8
E) 2
230. How produced Si from SiO2
A) Reduction with C in electric furnace
B) By Zn
C) By Mg
D) With H2 at high temperature
E) By CO2
231. Which reaction used for production of pure Si?
A) SiH4 Si+2H2
B) SiO2 + 2H2 Si + 2H2O
C) SiO2 + 2Mg Si + 2MgO
D) Si + 2MgO
E) SiO2 + C Si + CO
232. What is the composition of window glass?
A) Na2O, CaO, SiO2
B) Na2O,PbO SiO2
C) CaO ,PbO, SiO2
D) B2O3, CaO, SiO2
E) CaO, AI2O3, SiO2
233. Show correct products of Si+KOH reaction
A) K2SiO3 + H2
B) H2SiO3 + K2O
C) K4Si + H2SiO3
D) H4SiO4 + KOH
E) SiH4+ KOH
234. Which of them doesn’t react with HCl?
A) Ag
B) Zn
C) AI
D) Ca
E) Mg
235. Which compounds are contains ionic bond?
1- NaCI2. SiF43. CaS4. HCI
A) 1,3
B) only 2
C) 2,3
D) 1,4
E) 1,2
236. Where carbon is reducing agent?
1- CaO + C2. CuO + C3. Ca + C4. HNO3 + C5. H2SO4 + C
A) 2,4,5
B) 2,3,4
C) 1,4,5
D) 1,2,4,5
E) 3,4,5
237. Which salts of Ca and Mg are found in permanently hardness?
A) Chlorides and sulfates
B) Nitrates and fosfates
C) Chlorides and nitrates
D) Sulfates və fosfates
E) Fosfates və nitrates
238. Which salt one of component of temporary hardness?
A) Ca(HCO3)2
B) CaCO3
C) MgCO3,
D) KHCO3
E) CaSO4
239. Which elements oxidize in Cr2S3 + KNO3 + Na2CO3 K2CrO4 + NO + CO2 + Na2SO4?
A) S, Cr
B) N, S
C) Cr, C, N
D) Cr, N
E) O, N
240. Which element most spreading in solar system?
A) H2
B) O2
C) He
D) C
E) Ar
241. Where correct shown of oxidation and valence of oxygen?H3O+Na2O2CO
A) III; -2II; -1III; -2
B) II; -2II; -2II; -2
C) III; -2II; -2II; -2
D) II; -2II; -1III; -2
E) III; -2I; -1III; -2
242. Which elements oxidize in 2KNO3 + S + 3C → K2S + 3CO2 + N2
A) only C
B) S, N2
C) only S
D) only N2
E) N2, C
243. Find coefficient of reducing agent and water
Al + KClO4 + H2SO4 → Al2(SO4) 3 + KCl + H2O
A) 20
B) 11
C) 16
D) 12
E) 7
244. Which reaction doesn’t belong to oxidation-reduction?
A) 2NH3 + CO2 + H2O → (NH4) 2CO3
B) 2FeCl2 + Cl2 → FeCl3
C) 4NO2 + O2 + 2H2O → 4HNO3
D) 2Fe(OH) 2 + H2O2→ 2Fe(OH) 3
E) 2CO + O2 → 2CO2
245. Molyality is the…. .
A) Mol number in the 1000 g solution
B) Mol number in the 100 g solution
C) Equivalent amount of solute dissolved in 100 ml solvent
D) Mass of solute dissolved in 1000 g solution
E) Mass of solute dissolved in 1l solution
246. Show the compounds that solubility of them increase when temperature increase.
A) KNO3, KClO3, Na2CO3
B) SO3, NO2, P2O3
C) CH4, N2, O2
D) FeCl3, Cu(NO3) , C6H6
E) NaOH, CaCO3, C3H8
247. Show the compounds that contains hydrogen bond.
A) CH3NH2,H2O,HF
B) CO2,NH3, H2SO4
C) HCI,NaON,HF
D) KCI, H2O ,H2S
E) HF, H2O,SiO2
248. How changes properties from left to right in the Be, Mg, Ca, Sr, Ba raw?
A) Metallic properties increase
B) Metallic properties decrease
C) Non-metallic properties increase
D) Electronegativity increase
E) Atomic radius decrease
249. Find the coefficient of the oxidant in the reaction: Fe(CrO2)2+Na2CO3+O2→Fe2O3+Na2CrO4+CO2
A) 3
B) 6
C) 4
D) 7
E) 5
250. Find the sum of the coefficients of reducing agent and water in the following reaction:
Al+KClO4+H2SO4→Al2(SO4) 3+KCl+H2O