Preparation of Chlorine

Q. On electrolysis of Brine solution, is produced at anode and , at cathode.

1. $C{l}_2$
2. $H_2$
3. $O_2$
4. $Na$

Q.

How is carbon dioxide prepared in the laboratory?

Q.

Name a gas that cannot be collected over water

Q.

Mention the conditions required to maximise the yield of ammonia.

Q.

What is the action of chlorine on excess ${\mathrm{NH}}_3$?

Q.

Which of these will not react with Acetylene?

1. $\mathrm{Na}$

2. $\mathrm{HCl}$

3. $\mathrm{NaOH}$

4. Ammonical ${\mathrm{AgNO}}_3$

Q. Which of the following is/are used as a bleaching agent(s)?

1. $C{l}_2$
2. $H_2{O}_2$
3. $S{O}_2$
4. $Cl{O}_2$

Q. During electrolysis of solution of brine (Concentrated solution of NaCl) chlorine gas is liberated at

1. Anode
2. Cathode
3. Partly at anode and cathode
4. In between the electrodes

Q.

(a) The gases hydrogen and chlorine dont react with each other, even if kept together for a long time. However, in the presence of sunlight, they readily combine. What actually happens?
(b) A water-insoluble substance X on reacting with dilute H₂SO₄ released a colorless and odorless gas accompanied by brisk effervescence. $\left({\mathrm{CO}}_2\right)$ When the gas was passed through water, the solution obtained turned blue litmus red. On bubbling the gas through lime water, it initially became milky and the milkiness disappeared when the gas was passed in excess. Identify the substance X and write the chemical equations of the reactions involved.

Q. Drop wise addition of concentrated sulfuric acid to a mixture of sodium chloride and manganese dioxide gives

1. Hydrogen gas and chlorine gas
2. Hydrogen chloride gas
3. Solution of chlorine
4. Chlorine gas

Q.

which gas is evolved at cathode during electolysis of an aqueus solution of Nacl?

Q.

Name the gas which cannot be dried by passing through concentrated sulfuric acid.

Q.

How can you prepare $C{l}_2$ from HCl and HCl from $C{l}_2$ ? Write equation only.

Q.

What happens at the anode during electrolysis?

Q.

Reaction of ammonia with excess Cl₂ gives:

1. ${\mathrm{NH}}_4\mathrm{Cl}\mathrm{and}{\mathrm{N}}_2$

2. ${\mathrm{NH}}_4\mathrm{Cl}\mathrm{and}\mathrm{HCl}$

3. ${\mathrm{NCl}}_3\mathrm{and}\mathrm{HCl}$

4. ${\mathrm{NCl}}_3\mathrm{and}{\mathrm{NH}}_4\mathrm{Cl}$

Q.

Why is it necessary to remove CO when ammonia is obtained by Haber’s process?

Q.

What is the action of chlorine on excess NH₃?

Q.

State the observation at the anode and at the cathode during the electrolysis of
Fused Lead bromide using graphite electrodes.

Q. What is the net reaction in Hall-Heroult process?

1. $2A{l}_2{O}_3+3C\to 4Al+3C{O}_2$
2. $4A{l}_2{O}_3+3C\to 4Al+6C{O}_2$
3. $F{e}_2{O}_3+A{l}_2{O}_3\to Al+F{e}_2{O}_3$
4. $N{a}_{3}Al{F}_6\to Al{F}_3+3NaF$

Q.

A compound that liberates reddish-brown gas around the anode during electrolysis in its molten state

1. Sodium chloride

2. Copper(II) oxide

3. Copper(II) sulphate

4. Lead(II) bromide

Q.

Discuss and give chemical reaction of Lassaigne Test for

1. Nitrogen in the organic compound.

2. Nitrogen and Sulphur, both in the organic compound.

Q. Salicylic acid on treatment with nitrating mixture produces

Q. Nitrogen can be purified from the impurities of oxides of nitrogen and ammonia by passing through?

Q. Let hydrolysis constant (Kh) of NH4+ be y. Then equilibrium constant (Ka) for conjugate acid of NH3 at 25°C is : (1) 1 x 10-14 y ( 1 by y into 10 to the power - 14) (2) 10–14 (3) y (4) y × 10–14

Q.

Oxygen can be obtained from bleaching powder by:

1. Action of dilute acids

2. Action of alkalies

3. Heating it with lime

4. Heating it with a cobalt salt

Q.

Name the proceses from which chlorine is obtained as a by product. What will happen if an aqueous solution of NaCl is subjected to elefctrolysis?

Q. How many compounds or elements with $PC{l}_5\text{give}POC{l}_3$ as a minor, major or intermediate product?

$Ag,Sn,H_{2}O,C_2{H}_{5}OH,C{H}_{3}COOH$

Q. $Br{O}_3^{-}$ changes into $B{r}_2$ in an acidic medium of a unbalanced equation. How many electron should be present in the balanced equation?

1. 3 electrons in right
2. 10 electrons in left
3. 3 electrons in left
4. 6 electrons in left

Q.

Identify the following substance that is underlined: The Catalyst used to oxidize ammonia.

Q.

The Chemical Reaction Either Caused Or Accompanied By the Passage of an Electric Current Are Called __________Reactions