Laboratory Preparation of Ammonia

Q. 1) What is Valence Bond Theory (VBT) and Molecular Orbit Theory (MOT)?
2) What are polar and non polar compounds?
3) What is pulverisation?

Q.

Explain the formation of the ammonia molecules.

Q.

Is HCl a Hydrogen Bond?

Q. Valence Bond Theory cannot explain paramagnetic nature of oxygen molecule.

1. True

2. False

Q.

Name the substance used for drying ammonia

1. Concentrated sulphuric acid
2. Calcium chloride
3. Calcium oxide
4. Phosphorous pentoxide

Q. During the laboratory preparation, how is ammonia dried and collected?

Q.

How many Chlorine atoms are required by carbon atom to complete its octet configuration?

1. Four

2. One

3. three

4. Two

Q.

What is the role that calcium oxide in the preparation of ammonia gas?

1. It is used as a reactant in the production of ammonia

2. It is used as a catalyst in the production of ammonia

3. It is used as a drying agent in the production of ammonia

4. It is used as a reactant and drying agent in the production of ammonia

Q. Explain in detail about each:
1) Valence Bond Theory (VBT)
2) Molecular Orbital Theory (MOT)

Q.

Why is higher ratio of calcium hydroxide is taken (with ammonium chloride) in labrotary preparation of ammonia

Q.

The drying agents like $P_2{O}_5$ and CaO cannot be used to dry hydrogen chloride gas because:

1. P₂O₅ is volatile

2. CaO is not a drying agent

3. Both P₂O₅ and CaO react with hydrogen chloride

4. P₂O₅ is not a drying agent

Q. is used as a drying agent during the production of ammonia.

1. Sulphuric acid
2. Calcium oxide
3. Calcium chloride

Q.

Which oxide of phosphorus is used extensively as a drying agent?

Q.

Calcium oxide and phosphorus pentoxide are very good drying agents but they are not used to dry HCl gas. Give reasons for each.

Q.

Complete the reaction. Sulphur dioxide $\mathrm{A}>$ Sodium sulphite.

Q.

A covalent bond is formed by____.

1. One sided sharing of electron.

2. Complete transfer of electrons.

3. Mutual sharing of electron.

4. By donating a lone pair of electron.

Q.

calculate the bond order of He₂⁺

Q.

Write an equation to illustrate the reducing nature of ammonia.

1. 

2. 

3. 

4. 

Q.

If reaction between nitrogen and hydrogen to form ammonia is exothermic, then it will be accompanied by:

1. Change in state

2. Evolution of heat

3. Formation of precipitate

4. Change in colour

Q. Write the equations for the following reactions, which result in the formation of ammonia:
(i) a mixture of ammonium chloride and slaked lime is heated.
(ii) aluminium nitride and water.

Q.

Write the chemical equation when a mixture of Ammonium chloride and slaked lime is heated.

Q.

Name the salt referred to as sal volatile.

1. Potassium nitrate

2. Sodium nitrate

3. Ammonium carbonate

4. Calcium nitrate

Q.

In order to get dry ammonia, the gas is passed through______.

1. calcium chloride

2. hydrogen chloride

3. quick lime

4. sulphuric acid

Q. Bond order for 1. No2+ 2.No3- 3.No2 4.No2-

Q. Write the equation for:
(i) The preparation of ammonia from ammonium chloride and calcium hydroxide.
(ii) The reaction of hydrogen chloride with ammonia.

Q. The molecule containing a triple covalent bond is :

1. ammonia
2. methane
3. nitrogen
4. water

Q. Covalent bond is formed by sharing of electrons between the atoms.

1. True
2. False

Q. In the Haber process for the synthesis of ammonia, the use of catalyst:

1. increases the amount of ammonia formed without changing the rate of formation
2. increases the rate of formation and amount of ammonia formed
3. increases the rate of formation of ammonia without changing the amount of ammonia formed
4. increases the rate of formation but decreases the amount of ammonia formed

Q. Draw an electron dot diagram to show the formation of ammonium ion [Atomic number: $N=7$ and $H=1$].

Q. Covalent bond is formed by sharing of electrons between the atoms.

1. False
2. True