Chemical Properties of Ammonia

Q.

${\mathrm{NH}}_4{\mathrm{NO}}_3$ on heating gives_______

Q.

Ammonia solution in water gives a blue precipitate when it combines with a solution of copper salt. The blue precipitate further dissolves in excess of ammonia solution to give an azure blue solution. Explain with equation.

Q.

Name two gases that combine to form a solid.

Q.

What do you observe when sugar crystals are added to hard glass test tube containing conc. sulphuric acid?

1. Oxygen gas is released.

2. Carbon monoxide gas is released.

3. Carbon dioxide gas is released.

4. A black spongy mass of carbon is obtained.

Q.

On heating ammonium dichromate, the gas evolved is?

Q.

You are provided with two reagent bottles marked A and B. One contains $N{H}_{4}OH$ solution and the other contains NaOH solution. How will you identify them by a chemical test ?

Q. Ammonia burns in an atmosphere of excess with a greenish-yellow flame.

1. nitrogen
2. oxygen
3. argon
4. hydrogen

Q.

Potassium oxide reacts with dilute nitric acid to form a soluble salt. Name this salt.

1. Potassium hydroxide

2. Potassium nitrite

3. Potassium hydride

4. Potassium nitrate

Q.

Give the balanced equation for the following reaction:

Lead chloride from lead nitrate solution and Sodium chloride solution.

Q.

______ $(\mathrm{AgCl}/{\mathrm{PbCl}}_2)$a white precipitate is soluble in excess of ${\mathrm{NH}}_4\mathrm{OH}$.

Q.

The aqeous solution of ammonia is:

1. acidic and act as weak base

2. alkaline and acts as weak alkaline

3. acidic and act as strong base

4. alkaline and act as strong base

Q. What effect does moist NH3 gas have on litmus paper?

Q.

Name a substance which, on heating, leaves no residue behind. Give the equation.

Q.

Write balanced equation for the action of warm water on magnesium nitride.

Q. Will the compound NH3 acts as an acid or a base. Justify your answer in line with the Bronsted-Lowry Theory

Q. What happens when a candle is burnt?

Q.

Sodium hydroxide reacts with dilute nitric acid to form a soluble salt. Name this salt.

1. Sodium hydroxide

2. Sodium nitrite

3. Sodium nitrate

4. Sodium hydride

Q. You are given three white powders-calcium carbonate, lead carbonate and zinc carbonate. Describe the tests you would carry out in solution, to identify the metal ion in each of the above compounds. Indicate clearly how you would prepare the solutions for the test.

Q.

Which of the following gas is used to flush the bags of chips ?

1. Carbon dioxide

2. Oxygen

3. Chlorine

4. Nitrogen

Q.

Write the equation for the action of heat on :

(a) Ammonium chloride, (b) Ammonium nitrate.

State whether each reacton is an example of thermal decomposition or thermal dissociation.

Q. State what would you observe when a piece of moist red litmus paper is placed in a gas jar of ammonia.

Q.

A gas 'A' reacts with another gas 'B' in the presence of a catalyst to give a colourless gas 'C'. The gas 'C' when comes in contact with air produces a brown gas 'D'. The solution of 'A' in water turns red litmus blue. Explain the observations.

Q.

Which theory is correct Arrhenius or Bronsted Lowry theory?

Q.

By what means other than heating can you dehydrate ${\mathrm{CuSO}}_4.5{\mathrm{H}}_2\mathrm{O}$ and obtain anhydrous copper sulphate.

Q.

Distinguish by adding ammonium hydroxide solution to calcium salt and lead salt.

Q.

Write the equation for the action of heat on potassium nitrate.

Q. Litmus is used to test either substance is

1. moist gas or dry gas
2. semi-solid or solid
3. acidic or alkaline
4. aqueous or pure liquid

Q.

What happen when acid and base are reacted with each other .give any two reaction example ?

Q.

Name a gas which turns:

Alkaline pyrogallol solution brown.

Q.

Oxygen can be obtained by the decomposition of hydrogen peroxide.

1. True
2. False