Rate of Reaction

Q. Calculate the oxidation number of O in ${\text{OF}}_2$ and ${\text{H}}_2\text{O}$.

Q. Consider the following statements

Statement - I: Process of intermixing of two gases is spontaneous process

Statement - II: Separation of gases from the mixture is a non-spontaneous process

Now, choose the correct option

1. 
   Only statement I is correct
2. 
   Only statement II is correct
3. 
   Both the statements are correct
4. 
   Both the statements are incorrect

Q. For the reaction $N_2+3H_2\to 2N{H}_{3}ifd\left[N{H}_3\right]/dt=2\times {10}^{-4}mol{L}^{-1}{s}^{-1}\text{the value of}-d\left[H_2\right]/dt$ would be

1. $1\times {10}^{-4}mol{L}^{-4}{s}^{-1}$
2. $3\times {10}^{-4}mol{L}^{-1}{s}^{-1}$
3. $4\times {10}^{-4}mol{L}^{-1}{s}^{-1}$
4. $6\times {10}^{-4}mol{L}^{-1}{s}^{-1}$

Q.

By giving example define the term Inhibitor or negative catalyst.

Q.

Is salt a catalyst?

Q. A negative catalyst the rate of a reaction.

1. increases
2. decreases
3. maintains

Q. As pressure increases, the rate of reaction decreases.

1. True
2. False

Q.

Identify the type of each of the following chemical reactions.

1. The reaction of the heating of ferrous sulphate to form a ferric oxide, sulphur dioxide and sulphur trioxide gas.

2. The reaction between zinc and hydrochloric acid to form zinc chloride.

3. The reaction between hydrogen and chlorine gases and forming hydrogen chloride.

Q.

Which of the following is an example of a decomposition reaction?

1. Splitting of water into hydrogen and oxygen

2. Carbon completely burnt in oxygen yields carbon dioxide

3. Calcium oxide combined with water gives calcium hydroxide.

4. Oxygen combines with carbon monoxide, and carbon dioxide is formed.

Q. 34. Are all the decomposition reactions endothermic and what are uses of decomposition reaction.

Q. ____________is the phenomenon in which the rate of any reaction is altered by the presence of a substance and remains unchanged chemically in the reaction.

1. Hydrogenation
2. Catalysis
3. Amalgamation
4. Sulphonation

Q.

10.State the use of manganese dioxide in the laboratory preparation of oxygen from potassium chlorate?

Q. Which among the given option(s) is/are characteristics of a positive catalyst?

1. It participates in the reaction.
2. It enhances the reaction rate.
3. It reduces the time required for attaining equilibrium.
4. It alters the path of the reaction.

Q. Which of the given statements about catalysts is incorrect?

1. They speed up a chemical reaction
2. They reduce the time taken to reach equilibrium
3. They have an effect on the position of equilibrium once it is reached
4. They have no effect on the position of equilibrium once it is reached

Q. As temperature increases, the rate of reaction also increases.

1. False
2. True

Q. As pressure increases, the rate of reaction decreases.

1. True
2. False

Q. A catalyst which increases the rate of reaction is called ______.

1. auto-catalyst
2. negative catalyst
3. positive catalyst
4. bio-catalyst

Q. In the formation of NO and $O_2$$\text{from}N{O}_2\{2N{O}_2\to 2NO+O_2\}$, the rate of production of

1. NO and $O_2$ are equal.
2. NO is double the rate of consumption of $N{O}_2$.
3. NO is twice the rate of production of $O_2$.
4. $O_2$ is twice the rate of production of NO.

Q. Which among these describes the process by which ammonia is produced by the reaction of nitrogen with hydrogen at 200 atm pressure and in the presence of a catalyst?

1. Contact process
2. Hydrogenation
3. Calcination
4. Haber process

Q. As temperature increases, the rate of reaction also increases.

1. False
2. True

Q. Which one of the following reactions is NOT a decomposition reaction?

1. ${\mathrm{CaCO}}_3\left(s\right)\to \mathrm{CaO}\left(s\right)+{\mathrm{CO}}_2\left(g\right)$
2. $2H_{2}O\left(l\right)\to 2H_2\left(g\right)+O_2\left(g\right)$
3. $2\mathrm{AgCl}\left(s\right)\to 2\mathrm{Ag}\left(s\right)+{\mathrm{Cl}}_2\left(g\right)$
4. $H_2\left(g\right)+{\mathrm{Cl}}_2\left(g\right)\to 2\mathrm{HCl}\left(g\right)$

Q. 2 mL each of concentrated $\text{HCl},{\text{HNO}}_3$ and a mixture of concentrated $\text{HCl}$ and concentrated ${\text{HNO}}_3$ in the ratio of 3 : 1 were taken in test tubes labelled as A, B and C. A small piece of gold was put in each test tube. No change occurred in test tubes A and B but the metal got dissolved in test tube C respectively. Answer the following question.

Give reason why this observation was made.

Q. Which among the given options will decrease the activity of a catalyst?

1. Catalytic poison
2. Positive catalyst
3. Negative catalyst
4. Catalytic promoter

Q. Zinc powder reacts much faster with dil. $H_2{\mathrm{SO}}_4$ than does granulated zinc of the same mass.

Q. The rate of reaction depends on the

1. temperature of the reaction
2. catalyst
3. concentration of the reactants
4. all of these