Sulphides

Q.

Metallic sulphide reacting with hydrochloric acid forms salt and ___.

1. hydrogen gas.

2. carbon dioxide gas.

3. sulphur dioxide gas.

4. hydrogen sulphide gas.

Q.

Which of the following gas is evolved when sodium bisulphite reacts with sulphuric acid?

1. SO₂

2. SO₃

3. H₂S

4. CO₂

Q.

When sodium sulphite reacts with the dilute hydrochloric acid, salt X, water and gas Y is formed. Gas X decolourised pink potassium permanganate solution. Gas X is:

1. H₂

2. SO₂

3. CO₂

4. Cl₂

Q. Answer the question by selecting the appropriate option given below:

Assertion (A): The gas produced during the reaction of sodium carbonate with hydrochloric acid when passed through limewater, turns limewater milky.

Reason (R): Carbon dioxide reacts with limewater to form calcium hydrogen carbonate which forms a white precipitate.

[0.8 marks]

1. Both A and R are true, and R is the correct explanation of A.
2. Both A and R are true, and R is the correct explanation of A.
3. A is true, but R is false.
4. A is false, but R is true.

Q.

Complete the following chemical equation:
${Ca\left(HC{O}_3\right)}_2+HCl\to$

1. Conc. HCl

2. Conc.H₂SO₄

3. Aqua-regia

4. Conc. HNO₃

Q.

The product formed in the following reaction will be:

$2KHC{O}_3+H_{2}S{O}_4\to$

1. $K_{2}S{O}_4+C{O}_2$

2. $K_{2}S{O}_4+2H_{2}O+2C{O}_2$

3. $K_{2}S{O}_4+H_{2}O$

4. $K_{2}S{O}_4+H_{2}S+C{O}_2$

Q.

Fill in the blanks with the appropriate words.

An acid is a compound which when dissolved in water forms the (a)_______ ions as the only (b)__________ ions. (c) A base is a compound which if _______ in water contains (d)_______ ions. A base reacts with an acid to form a (e) _______ and water only. This type of reaction is known as (f) ________.

Q.

Which of the following will be the product(s) of the given reaction?

$SodiumThiosulphate+HydrochloricAcid\to$

1. $NaCl$

2. $S{O}_2$

3. $H_{2}O$

4. $S$

Q. Choose the correct option:
$Zn(OH{)}_2+$___$\to ZnS{O}_4+2H_{2}O$

1. Zn
2. HCl
3. $H_2$
4. $H_{2}S{O}_4$

Q. Identify X and Y in the reaction given below.
$NaHC{O}_3\left(s\right)+HCl\left(aq\right)\to NaCl\left(aq\right)+X+Y$

1. $X:H_{2}O;Y:C{O}_2$
2. $X:N{O}_2;Y:CO$
3. $X:H_{2}O;Y:CO$
4. $X:N_2;Y:C{O}_2$

Q. Answer the question by selecting the appropriate option given below:

Assertion (A): The gas produced during the reaction of sodium carbonate with hydrochloric acid when passed through limewater, turns limewater milky.

Reason (R): Carbon dioxide reacts with limewater to form calcium hydrogen carbonate which forms a white precipitate.

[0.8 marks]

1. Both A and R are true, and R is the correct explanation of A.
2. Both A and R are true, and R is the correct explanation of A.
3. A is true, but R is false.
4. A is false, but R is true.

Q.

Which of the following will be the product(s) of the given reaction?

$SodiumThiosulphate+HydrochloricAcid\to$

1. $NaCl$

2. $S{O}_2$

3. $H_{2}O$

4. $S$

Q.

Complete the reaction

$N{a}_{2}S+2HCl\to 2NaCl+$ ______

1. $H_{2}S$

2. $H_{2}S{O}_4$

3. $Na\left(s\right)+S_2$

4. $NaH$

Q.

Complete the reaction

$N{a}_{2}S+2HCl\to 2NaCl+$ ______

1. $H_{2}S{O}_4$

2. $H_{2}S$

3. $Na\left(s\right)+S_2$

4. $NaH$

Q. $2HCl+{Na}_2{S}_2{O}_x\to yNaCl+S{O}_2+S+H_{2}O$
Find the value of x and y.

1. $x=3,y=2$
2. $x=2,y=2$
3. $x=1,y=2$
4. $x=3,y=1$