Ministry of Education and Science The Republic of Kazakhstan S. Seifullin Kazakh agrotechnical university Department of chemistry and physics
Bank of exam questions (300)
On discipline General Chemistry
for students of technical specialties: 5B080600
1. What is the equivalent weight of the compound Ca3(PO4)2 (g-eq/mol)? Name it
1) 310 (calcium phosphate)
2) 155 (calcium monophosphate)
3) 51,6 (calcium phosphate)
4) 103,3 (calcium phosphide)
5) 77,5 (calcium phosphite)
2. What is the equivalent weight of the compound Fe(OH)3 (g-eq/mol)? Name it
1) 35,6 (trihydroxide iron)
2) 107 (hydroxide iron)
3) 53,5 (dihydroxide iron)
4) 26,75 (hydroxide iron (II))
5) 36,5 (trioxide iron)
3. What is the equivalent weight of the compound PbO2 (g-eq/mol)? Name it
1) 239 (lead dioxide)
2) 119,5 (lead oxide)
3) 59,75 (lead dioxide)
4) 264 (lead oxide (II))
5) 79,6 (lead dihydoxide)
4. What is the equivalent weight of the compound H3PO4 (g-eq/mol)? Name it
1) 98
2) 24,5
3) 115
4) 49
5) 32,6
5. What is the equivalent weight of the compound Al2(SO4)3 (g-eq/mol)? Name it
1) 57 (dialuminium trisulfate)
2) 342 (dialuminium trisulfite)
3) 114 (dialuminium trisulfide)
4) 85,5 (trialuminium disulfite)
5) 68,4 (aluminium trihydroxide)
6. What is the equivalent weight of the compound Na2SiO3 (g-eq/mol)? Name it
1) 122 (disodium carbonate)
2) 61 (disodium silicate)
3) 40,6 (sodium sulfate)
4) 30,5 (sodium sulfide)
5) 20,3 (disodium oxide)
7. What is the equivalent weight of the compound MnO3 (g-eq/mol)? Name it
1) 103 (magnesium oxide)
2) 51,5 (manganese oxide)
3) 17,16 (manganese trioxide)
4) 34,3 (mangenese dioxide)
5) 25,75 (trimangenese oxide
8. What is the equivalent weight of the compound NH4ОН (g-eq/mol)? Name it
1) 35 (ammonium hydroxide)
2) 17,5 (ammonium sulfate)
3) 7 (ammonium carbonate)
4) 8,75 (ammonium hydroxide)
5) 11,6 (potassium hydroxide)
9. What is the eqiuvalen weight of compound Н2SO4 (g-eq/mol)? Name it
1) 49 (sulfuric acid)
2) 98 (Sulfuric acid)
3) 32,6 (sulfurous acid)
4) 24,5 (thiosulfuric acid)
5) нет правильного ответа
10. How many degrees the temperature of the system should be increased by increasing the reaction rate by 81 times, if the temperature coefficient is equal to γ = 3?
1) 100С
2) 200С
3) 300С
4) 400С
5) 800С
11. How many times does the chemical reaction rate change at the temperature rise from 25oC to 75oC if the temperature coefficient is equal 3?
1) increases in 15 times
2) decreases in 15 times
3) decreases in 243 times
4) Increases in 243 times
5) increases in 27 times
12. How many times does the chemical reaction rate change at the temperature fall from 40oC if the temperature coefficient 4?
1) Decreases in 256 times
2) increases in 64 times
3) decreases in 16 times
4) increases in 16 times
5) decreases in 64 times
13.
Write down the law of mass action for the given direct reaction:
1) V= [O2]
2) V= k[Na]4[O]2
3) V= [Na]4[O2]
4) V=k [Na]4 +[O2]
5) V= k[O2]
14. "When a system at equilibrium is subjected to change in concentration, temperature, volume, or pressure, then the system readjusts itself to (partially) counteract the effect of the applied change and a new equilibrium is established" This definition conforms to the law:
1) law of mass action
2) Vant-Hoff rule
3) Hess law
4) Le Châtelier's principle
5) Faraday law
15. Write down the law of mass action for the given direct reaction:
1) V= [SO2][CO]2
2) V= k[CO2]2
3) V= [S] [CO2]2
4) V= k[S] [CO2]2
5) V= [CO2]2
16.
When the pressure increases and the concentration of hydrogen in the
system:
, the equilibrim will be shifts to ............
1) with increasing concentration of [H2] - to right, and pressure - to left
2) with increasing concentration of [H2] - to left, and pressure - to right
3) To right
4) to left
5) the equilibrim does not shift
17.
When the temperature and the concentration of ammonium increases in
the system:
(∆H<O) , the equilibrim will be shifts to ............
1) To left
2) To right
3) the equilibrim does not shift
4) with increasing concentration of [NH3] - to left, and temperature - to right
5) with increasing concentration of [NH3] - to right, and temperature - to left
18. Heterogeneous reaction occurs between:
1) nitrogen and hydrogen
2) oxygen and hydrogen
3) Magnesium and oxygen
4) sulfur dioxide and oxygen
5) nitrogen dioxide and oxygen
19. Vant-Hoff rule is described by following equation:
1)
2)
3)
4)
5)
20.
What is the osmotic pressure, in kilopascal of 0,1M benzene
solution
at
Celsius?
1) 251,9kPa
2) 174,5kPa
3) 24,9kPa
4) 249,4kPa
5) 1055,6kPa
21.
What is the osmotic pressure, in atmospheres of 2M ethanol solution
at
Celsius
(R=0,082 L atm/mol K)?
1) 2,50 atm
2) 16,4 atm
3) 0,164 atm
4) 4539,4 kPa
5) 44,772 atm
22.
A 4 gram of sugar
dissolved
in 1000 ml of solution. What is the osmotic pressure, in kilopascal
of this solution at 20°С
Celsius?
1) 6,371 kPa
2) 1,94 kPa
3) 34,57 kPa
4) 28,49 kPa
5) 300,50 kPa
23. What is the boiling point elevation of 2m formalin aqueous solution (ЕН2О= 0,52˚C)?
1) -0,52˚С
2) 1,04˚С
3) -1,04˚С
4) 101,04˚С
5) 100,52˚С
24.
What
is the freezing point of 1m glycerol
aqueous solution (КН2О=1,86˚)?
1) -1,00˚С
2) -1,86˚С
3) - 3,72˚С
4) +1,86˚С
5) - 2,79˚С
25. 0,5 moles of sugar (C12H22O11) dissolved in 500 g of water. What is the freezing point of this solution (КН2О=1,86˚)?
1) 0˚С
2) -1,86˚С
3) -3,72˚С
4) -0,93˚С
5) +1,86˚С
26.
What is the heat of reaction:
:
-264,45
0 0 -393,5
1) +922,4 кДж/моль
2) +135,4 кДж/моль
3) -135,4 кДж/моль
4) -129,05 кДж/моль
5) -922,4 кДж/моль
27.
What is the enthalpy change of the reaction:
+763 0 0 -786
1) -23,0 кДж/моль
2) +2335,0 кДж/моль
3) -809,0 кДж/моль
4) +809,0 кДж/моль
5) -2335,0 кДж/моль
28.
What is the entropy change of the reaction (J/mol*K):
6
131 33
131
1) -27,0 Дж/моль*град
2) +22,0 Дж/моль*град
3) -825,0 Дж/моль*град
4) +825,0 Дж/моль*град
5) +27,0 Дж/моль*град
29.
What is the change in Gibbs energy of reaction: 
DG298 kL/mol -244,30 -137,15 0 -393,37
1) +11,92 кДж/моль
2) -11,92 кДж/моль
3) +286,22 кДж/моль
4) -286,22 кДж/моль
5) -123,18 кДж/моль
30. Choose substances that form aqueous solution with acidic medium (pH<7):
1) KBr
2) Na2SiO3
3) CuSO4
4) KNO3
5) KI
31. Which salt is hydrolyzed by cation?
1) ZnCl2
2) Na3PO4
3) Na2SiO3
4) Fe(CH3COO)2
5) KCl
32. The reaction of the salt with water, whereby the salt is dissociated and decomposed to form a weak electrolyte (weak acid or weak base) is called ...
1) Electrolysis
2) Hydrolysis
3) Corrosion
4) Osmosis
5) Dissosiation
33. What salt is not hydrolyzed?
1) Na2CO3
2) K2S
3) BaCl2
4) Pb(NO3)2
5) K3PO4
34. What salt aqueous solution will have alkaline medium (pH>7)?
1) MgSO4
2) FeSO4
3) Pb(NO3)2
4) К2S
5) Ag2SO4
35. Which salt is hydrolyzed by anion?
1) BaCl2
2) AgNO3
3) FeCl3
4) Pb(NO3)2
5) CH3COONa
36. Where does the acid base indicator - litmus gain of red colour?
1) Na3PO4
2) CuCl2
3) KNO3
4) KCl
5) Ba(NO3)2
37. Where does the acid base indicator phenolphthalein gain of crimson (purple) colour?
1) SnCl2
2) MgSO4
3) AgNO3
4) KI
5) Na2СO3
38. Weak basis and weak acid that form salt XA, if such ionic - molecular equation X+ + A- + H2O = XOH + HA correspond to its hydroysis. What salt is it?
1) NaNO3
2) BaCl2
3) AlCl3
4) CrCl3
5) NH4NO2
39.
For an aqueous solution with pH=10,
hydroxide
ions concentration will be equal to....
(mol/L):
1) 10-10
2) 10-2
3) 10-9
4) 10-5
5) 10-4
40. For 0,01М sodium hydroxide aqueous solution (NaOH) its рH value will be equal:
1) 2
2) 12
3) 4
4) 10
5) 8
41. For an aqueous solution with pOH=5, hydrogen (H+) ions concentration will be equal to.... (mol/L):
1) 10-9
2) 10-5
3) 10-4
4) 10-2
5) 10-1
42. What is the pH value of the solution, with a content of [OH-] = 10-3 mol /L?
1) 3
2) 11
3) 5
4) 8
5) 9
43. What is the pOH of the solution, with a content of [H+] = 10-4 mol /L?
1) 9
2) 8
3) 6
4) 10
5) 4
44. What kind of water is obtained by passing the natural water through a system of cation and anion exchangers:
1) hardness
2) moderately hardness water
3) soft water