Catalysis

Q.

What is the chemical equation between citric acid and potassium permanganate (write in words)?

Q.

Write balanced equation for the following reaction:

(c) Iron(III) chloride solution with sodium hydroxide solution.

Q.

What is Catalyst? What is the effect of catalyst on the rate of reaction?

Q.

Balance the following unbalanced equations:

${\mathrm{CaCO}}_3+{\mathrm{H}}_3{\mathrm{PO}}_4\to {\mathrm{Ca}}_3{\left({\mathrm{PO}}_4\right)}_2+{\mathrm{H}}_2\mathrm{O}+{\mathrm{CO}}_2$

Q. Reaction of carboxylic acid with amine

Q.

Write the balanced chemical equations for the following chemical reactions-

(i) Aqueous solution of sulfuric acid and sodium hydroxide react to form aqueous sodium sulfate and water.

(ii) Phosphorous burns in chlorine gas to form phosphorous pentachloride.

Q.

Write balanced equation for the following reaction:

(b) Copper sulfate solution is added to sodium hydroxide solution.

Q.

Balance each one of the following chemical equations:

${\mathrm{BaCl}}_2+{\mathrm{H}}_2{\mathrm{SO}}_4\to {\mathrm{BaSO}}_4+\mathrm{HCl}$

Q.

When diazonium salt solution is treated with KI, it forms:

1. Bromobenzene

2. Phenol

3. Acid

4. Iodobenzene

Q.

The slow rate of decomposition of fallen logs in nature is due to their?

1. Anaerobic environment around them

2. Poor nitrogen content

3. Low moisture content

4. Low cellulose content

Q.

In the presence of a catalyst, the heat evolved or absorbed during the reaction ..... .

(a) increases
(b) decreases
(c) reamins unchanged
(d) may increase or decrease

Q.

Complete and balance the equation

$\mathrm{CuO}+{\mathrm{H}}_2{\mathrm{SO}}_4\to$

Q. Write balanced equation for reaction between

A $N{a}_2{O}_2$ and water

B $K{O}_2$ and water

C $N{a}_{2}O$ and $C{O}_2$

Q.

Write a balanced equation for Aluminium is warmed for $\mathrm{NaOH}$ (Caustic soda) solution.

Q.

What is the difference between contact process and lead chamber process?

Q. when propene reacts with CL2 in light gives A . A reacts with chlorine water to give B. B eacts with NaOH to give C . C reacts with ethoxide ion to give D . identify A, B, C, D in the series of reaction

Q.

Complete and balance the following equation:

(c) ${\mathrm{CaSO}}_4+\mathrm{NaOH}\to \mathrm{\_\_\_\_\_\_\_\_\_\_}$

Q.

Write the balanced chemical equations for the following reactions:

(a) Sodium carbonate on reaction with hydrochloric acid in equal molar concentrations gives sodium chloride and sodium hydrogen carbonate.

(b) Sodium hydrogen carbonate on reaction with hydrochloric acid gives sodium chloride, water liberates carbon dioxide.

(c) Copper sulfate on treatment with potassium iodide precipitates cuprous iodide, liberates iodine gas, and also forms potassium sulfate.

Q.

The free energy change for the following cell reaction is given as :
2 Au ³⁺ (aq) + 3 Cu (s) → 2 Au (s) + 3 Cu ²⁺ (aq)

1. 3 FE^ocell

2. -6 FE^ocell

3. -2 FE^ocell

4. 6 FE^ocell

Q. Which of the following statements is/are correct about solid catalysts?

1. Same reactants may give different products by using different catalysts.
2. A catalyst does not change $\Delta H$ of a reaction.
3. A catalyst is required in large quantities to catalyse the reaction.
4. Catalytic activity of a solid catalyst does not depend upon the strength of chemisorption.

Q.

In a titration between oxalic acid and acidified potassium permanganate, the manganous salt is formed which catalyses the reaction. The manganous salt is

1. An auto catalyst

2. A positive catalyst

3. A promoter

4. Inhibitor

Q.

At 473 K, equilibrium constant K_cfor decomposition of phosphorus pentachloride, PCl₅ is 8.3 ×10^-3. If decomposition is depicted as,

_rH° = 124.0 kJmol^–1

a) Write an expression for K_c for the reaction.

b) What is the value of K_cfor the reverse reaction at the same temperature?

c) What would be the effect on K_c if (i) more PCl₅ is added (ii) pressure is increased? (iii) The temperature is increased?

Q. Explain fehlings solution and tollens reagent in detail and explain which type of compounds reduces these two reagents

Q.

Calculate the emf of the cell in which the following reaction takes place:

Given that = 1.05 V

Q.

Match List-1 with List-2:

Column 1	Column 2
Deacons process	ZSM-5
Contact process	${\mathrm{CuCl}}_2$
Cracking of hydrocarbons	Particles $\mathrm{Ni}$
Hydrogenation of vegetable oils	${\mathrm{V}}_2{\mathrm{O}}_5$

Q.

Write balanced chemical equations for the following:

Water is added to Sodium aluminate and heated

Q.

From the equation:

${\left({\mathrm{NH}}_4\right)}_2{\mathrm{Cr}}_2{\mathrm{O}}_7\to {\mathrm{Cr}}_2{\mathrm{O}}_3+4{\mathrm{H}}_2\mathrm{O}+{\mathrm{N}}_2$

Calculate the volume of nitrogen at STP evolved when $63\mathrm{g}$ of ammonium dichromate is heated.

Q.

Complete and balance the equation

$\mathrm{NaOH}+{\mathrm{NH}}_4\mathrm{Cl}\to$

Q.

Formalin (a solution of formaldehyde in water) is used for preserving biological specimens. Identify the incorrect statement:

1. Formaldehyde should be soluble in water.

2. Formaldehyde is expected to be a strong oxidizing agent.

3. Formaldehyde acts as an antioxidant.

4. Formalin preserves dead specimens from decay.

Q.

State what would you observe when: Washing soda crystals are exposed to atmosphere.