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Chemical Equilibrium

Authored by Lazzy Masunda

Chemistry

12th Grade

Used 52+ times

Chemical Equilibrium
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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 2 pts

The reaction 2ICl(s) ⇌ I2I_2 (s) + Cl2Cl_2 (g) is at equilibrium. Which change will increase the yield of Cl2Cl_2

removing some of the I2I_2 (s)

adding more ICl(s)

removing the Cl2Cl_2 as it is formed

decreasing the volume of the container

2.

MULTIPLE CHOICE QUESTION

1 min • 2 pts

Consider the equilibrium: 2 NO2NO_2 (g) ⇌ N2O4N_2O_4 (g) + energy. The equilibrium will shift to the left as a result of

adding a catalyst

increasing the volume

removing some N2O4N_2O_4

decreasing the temperature

3.

MULTIPLE CHOICE QUESTION

1 min • 2 pts

An indication that an equilibrium system favours the products is a …

large KcK_c

positive ΔH

very small value for KcK_c

low activation energy

4.

MULTIPLE CHOICE QUESTION

1 min • 2 pts

The reaction CO(g) + 2 H2H_2 (g) ⇌ CH3OHCH_3OH (g) + energy produces methanol. What will maximize the equilibrium yield of CH3OHCH_3OH ?

low temperature and low pressure

high temperature and low pressure

low temperature and high pressure

high temperature and high pressure

5.

MULTIPLE CHOICE QUESTION

1 min • 2 pts

Consider the equilibrium: PCl5PCl_5 (g) ⇌ PCl3PCl_3 (g) + Cl2Cl_2 (g).  A 1 L flask contains 0,02 mol PCl5PCl_5 , 0,05 mol PCl3PCl_3 and 0,05 mol Cl2Cl_2 at equilibrium. The value of KcK_c is …

0,125

2,50

5,00

8,00

6.

MULTIPLE CHOICE QUESTION

1 min • 2 pts

Media Image

Consider the equilibrium:

CH3COOHCH_3COOH (aq) + H2OH_2O (l) ⇌ CH3COO−CH_3COO^- (aq) + H3O+H_3O^+ (aq) + heat

A stress was applied at time t1 and the data was plotted …

The stress is the result of …

the addition of  HCl

decreasing the temperature

the addition of NaCH3OONaCH_3OO

increasing the volume of the container

7.

MULTIPLE CHOICE QUESTION

1 min • 2 pts

Consider the equilibrium:  C(s) + 2 H2H_2 (g) ⇌ CH4CH_4 (g).  The addition of H2H_2 will cause the equilibrium to shift to the …

left and [CH4]\left[CH_4\right] will increase

left and [CH4]\left[CH_4\right] will decrease

right and [CH4]\left[CH_4\right] will increase

right and [CH4]\left[CH_4\right] will decrease

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