Reaction with Metal Salts

Q.

State what would you observe when: Copper carbonate is heated.

Q.

Which of the following is not a thermal decomposition reaction?

1. $2H_{2}O\to 2H_2+O_2$

2. $2FeS{O}_4\to F{e}_2{O}_3+S{O}_2+S{O}_3$

3. $ZnC{O}_3\to ZnO+C{O}_2$

4. $2KCl{O}_3\to 2KCl+3O_2$

Q.

What happens when Ammonium chloride is heated. (write balanced chemical eqaution)

Q.

What happens when sodium nitrate is heated? (write balanced chemical equation)

Q.

Complete the following equation:$\mathrm{Ca}{\left({\mathrm{NO}}_3\right)}_2\stackrel{∆}{\to }$

Q.

Write balanced chemical equation for the following

When lead nitrate is heated

Q.

What is observed when excess of ammonia is passed through an aqueous solution of lead nitrate.

1. A brown precipitate formed which is soluble in excess of ammonia.

2. A brown precipitate formed which is insoluble in excess of ammonia.

3. A white precipitate formed which is insoluble in excess of ammonia.

4. A white precipitate formed which is soluble in excess of ammonia.

Q.

What do you mean by liquor ammonia?

Q.

State what would you observe when: Sodium carbonate solution is mixed with calcium chloride solution.

Q.

Select the correct answer from A, B , C and D.

A. Nitroso Iron[II] Sulphate

B. Iron [III] Chloride

C. Lead[II] Chloride

D. Sodium Chloride

Q1. A compound soluble in hot water but insoluble in cold water.

Q2. A compound which in the aq. soln. state, is neutral in nature.

Q.

Write a balanced chemical equation which represents thermal decomposition of ferrous sulphate.

Q.

Why is the ratio of 2:3 of ammonium chloride and calcium hydroxide taken in lab preparation of ammonia gas

Q.

A crystalline pale green compound $\mathrm{A}$ when heated, gives the characteristic odour of burning sulphur and another residue $\mathrm{B}$ is obtained which is brown in colour. Write a balanced equation for the reaction and identify $\mathrm{A}$ and $\mathrm{B}$.

Q.

Identify the substances based on the information given below and choose the correct option:

The white crystalline solid Q is soluble in water. It liberates a pungent smelling gas when heated with sodium hydroxide solution.

1. Ferric chloride

2. Magnesium chloride

3. Ammonium chloride

4. Barium chloride

5. Zinc chloride

Q.

State what would you observe when: Lead nitrate is heated.

Q.

What happens when (write balanced chemical equations):

A mixture of methane and oxygen (in the volume ratio 9:1) is passed through a copper tube at $200°\mathrm{C}$ and $100\mathrm{atm}$.

Q.

When ammonium hydroxide is added to iron sulphate, a green precipitate appears. The green precipitate is of:

1. Ammonium salt (ammonium sulphate)

2. Iron (II) hydroxide

3. Both a and b

4. None of the above

Q.

The salt which in solution gives a pale green precipitate with sodium hydroxide solution and a white precipitate with barium chloride solution is:

1. Iron(III) sulphate

2. Iron(II) sulphate

3. Iron(II) chloride

4. Iron (III) chloride

Q.

Name the gas evolved when the following mixtures are heated:
(i) Calcium hydroxide and ammonium chloride
(ii) Sodium nitrate and ammonia chloride

Q.

Name the chloride of a metal which is soluble in excess of ammonium hydroxide. Write equation for the same.

Q.

Give one example for thermal decomposition reaction.

Q.

Which of the following is not a decomposition reaction?

1. $CaC{O}_3\stackrel{∆}{\to }CaO+C{O}_2$

2. $2KCl{O}_3\stackrel{∆}{\to }2KCl+3O_2$

3. Digestion of food in body

4. $H_2+C{l}_2\to 2HCl$

Q.

Why is ammonia gas not collected over water?

Q.

What is analysis? To which kind of chemical reaction belongs analysis? Explain it with a suitable example.

Q.

A compound which is insoluble in cold water but soluble in a solution of excess ammonia.

1. Silver chloride

2. Sulphur

3. Hydrogen chloride

4. Copper (II) sulphate

Q.

The following reactions are carried out :

A : Nitrogen + metal $\to$ compound X.

B : X +water $\to$ ammonia +another compound.

C : Ammonia + metal oxide $\to$ metal+ water +$N_2$.

One metal that can be used for reaction A is magnesium.

(a) Write the formula of the compound X formed.

(b) Write the correctly balanced equation for reaction B where X is the compound formed.

(c) What property of ammonia is demonstrated by reaction C ?

Q.

Splitting up of water molecule into hydrogen and oxygen, on passing electric current, is a ________ reaction.

Q. Sulphuric acid is soluble in water.

1. True
2. False

Q.

When Anupreeta heated ferrous sulfate crystals in a test tube, she observed

(i) green color changes to yellow

(ii) green color changes to reddish-brown

(iii) blue color changes to brownish color

(iv) smell of burning sulfur is obtained

1. (i) and (iv)

2. (ii) and (iv)

3. (ii) and (iii)

4. (i) and (iii)

Q.

What happens when Lead nitrate is heated in a dry test tube? (write balance chemical equation)