Le Chatelier's Principle for Del N Equals to 0

Q.

As temperature increases, the rate of reaction

1. increases
2. stays the same
3. decreases and increases
4. decreases

Q. $342\text{g}$ of 20% (by mass) of $Ba{\left(OH\right)}_2$ solution (specific gravity = 0.57) reacts with $1200\text{mL}$ of $2\text{M}$ $HN{O}_3$. If the resulting density is the same as pure water, then the molarity of the hydronium ions in the resulting solution is:

1. 0.25 M
2. 0.5 M
3. 0.888 M
4. None of these

Q. The yield of product in the reaction,
$A_2\left(g\right)+2B\left(g\right)\rightleftharpoons C\left(g\right)+QkJ$
would be higher at:

1. Low temperature and high pressure
2. High temperature and high pressure
3. Low temperature and low pressure
4. High temperature and low pressure

Q. Calculate solubility of $AgCl$ in $0.1MNaCl$ at ${25}^{o}C$ if its solubility product at same temperature is $2.0\times {10}^{-10}mo{l}^2{L}^{-2}$.

1. $2.0\times {10}^{-7}mol{L}^{-1}$
2. $2.0\times {10}^{-9}mol{L}^{-1}$
3. $2.5\times {10}^{-7}mol{L}^{-1}$
4. $3.0\times {10}^{-9}mol{L}^{-1}$

Q. For the gas phase reaction,
$C_2{H}_4\left(g\right)+H_2\left(g\right)\rightleftharpoons C_2{H}_6\left(g\right);△H^o=-136.8kJmo{l}^{-1}$
carried out in a vessel, the equilibrium concentration of $C_2{H}_4$ can be increased by:

1. Increasing the temperature
2. Decreasing the pressure
3. Removing some $H_2$
4. Adding some $C_2{H}_6$

Q. When dragons burn their victims, the following reaction takes place:

$2C+O_2⟶2C{O}_2$

The average rate of reaction could be expressed as?

1. 
2. All of the above
3. 
4. 

Q.

In an exothermic reaction $A\to B$, the activation energy of reverse reaction is twice that of forward reaction. If enthalpy of the reaction is -80 kJ $mo{l}^{-1}$, the activation energy of the reverse reaction is :

1. $80.0kJmo{l}^{-1}$

2. $60.0kJmo{l}^{-1}$

3. $40.0kJmo{l}^{-1}$

4. $160.0kJmo{l}^{-1}$

Q. A metal ore weighing 6.125 g was roasted in air to get 5.725 g of the oxide. The oxide was then put into sulfuric acid and dried. This gave us a white solid of mass 7.725 g. The final solid is a

1. Sulphate
2. Sulphite
3. None of the above
4. Sulphide

Q. The equilibrium reaction that is not influenced by volume change at constant temperature is:

1. $H_2\left(g\right)+I_2\left(g\right)\rightleftharpoons 2HI\left(g\right)$
2. $N_2\left(g\right)+3H_2\left(g\right)\rightleftharpoons 2N{H}_3\left(g\right)$
3. $N_2{O}_4\left(g\right)\rightleftharpoons 2N{O}_2\left(g\right)$
4. $2NO\left(g\right)+O_2\left(g\right)\rightleftharpoons 2N{O}_2\left(g\right)$

Q. For the gas phase reaction,
$C_2{H}_4\left(g\right)+H_2\left(g\right)\rightleftharpoons C_2{H}_6\left(g\right);△H^o=-136.8kJmo{l}^{-1}$
carried out in a vessel, the equilibrium concentration of $C_2{H}_4$ can be increased by:

1. Increasing the temperature
2. Decreasing the pressure
3. Removing some $H_2$
4. Adding some $C_2{H}_6$

Q.

Electra needs to answer this question to master this topic.
Help her calculate the equilibrium constant of the following reaction:
$Cu\left(s\right)+2A{g}^{+}\left(aq\right)\to C{u}^{2+}\left(aq\right)+2Ag\left(s\right)$
$E_{cell}^0=0.46V$

The options below are $logK$ values where $K$ is the equilibrium constant.

1. 15.45

2. 15.59
3. 15.93
4. 19.5

Q.

The effect of increasing the pressure on the equilibrium

$2A\left(g\right)+3B\left(g\right)\rightleftharpoons 3A\left(g\right)+2B\left(g\right)$ is

1. Forward reaction is favoured
2. Backward reaction is favoured
3. No effect
4. None of the above

Q.

For the reaction $CO\left(g\right)+H_{2}O\left(g\right)\rightleftharpoons C{O}_2\left(g\right)+H_2\left(g\right)$ at a given temperature, the equilibrium amount of $C{O}_2\left(g\right)$ can be increased by

1. Adding a suitable catalyst

2. Adding an inert gas

3. Decreasing the volume of the container

4. Increasing the amount of CO (g)