Metals Reaction with Acid

Q.

What do you observe when

(a) dilute sulphuric acid is added to granulated zinc ?

(b) a few pieces of iron are dropped in a blute solution of sodium chloride ?

(c) silver nitrate is added to a solution to a of sodium chloride ?

(d) ferrous sulphate solution is added to an aqueous solution of sodium hydroxide.

(e) solid lead nitrate is heated ?

(f) when dilute sulphuric acid is added to barium chloride solution ?

Q. What happens when​
(a) Dilute sulphuric acid is poured on a copper plate?​
Write word equations of the reactions involved.​
(b) Iron nails are placed in copper sulphate solution?​
Write word equations of the reactions involved.​

​

Q.

Mn + dil.HNO₃ → Salt + ?

1. Nitrate

2. Hydrogen

3. Oxygen

4. Nitrogen oxide

Q.

On the electrolysis of aqueous solution of sodium sulphate, on cathode we get

1. Na

2. H₂

3. SO₂

4. SO₃

Q.

Name the method used for the preparation of the given salt.

Zinc sulphate

1. Double decomposition

2. Direct synthesis

3. Simple displacement

4. Neutralization

5. Decomposition by acid

Q.

Name the metals which displace hydrogen from acids.

Q.

Name the metals which do not displace hydrogen from acids

Q.

Out of the following, which metal cannot displace hydrogen gas from dil $HCl$ or dil $H_{2}S{O}_4$?

1. Zn

2. Al

3. Cu

4. Mg

Q. In a reaction between a metal and an acid, why are bubbles formed?

1. Formation of metal salt
2. Formation of an acid
3. Formation of $H_2$ gas
4. Formation of $O_2$ gas

Q. A metal reacts with acid and liberates gas which burns with a pop sound when brought in contact with a flame.

1. nitrogen
2. carbon monoxide
3. hydrogen
4. carbon dioxide
5. oxygen

Q.

Al + HCl $\to$ ? + ?

1. Aluminum chloride + hydrogen

2. Aluminum + Chlorine

3. Aluminum hydride + Chlorine

4. Aluminium chloride + water

Q. Select an option with a set of two noble metals.

1. Gold (Au); Platinum (Pt)
2. Silver (Ag); Potassium (K)
3. Gold (Au); Iron (Fe)
4. Gold (Au); Sodium (Na)

Q. Which of the following metal on reaction with hydrochloric acid does not form bubbles in the solution?

1. Zinc (Zn)
2. Iron (Fe)
3. Aluminium (Al)
4. Gold (Au)

Q. Ms Deepika conducted a few experiments to explain the properties of metals and non-metals. She set up the experiments as shown in the given figure.

She noted the observation as:
(I) No reaction will take place in beakers (iv) and (v).
(II) Hydrogen gas will be evolved in beakers in (i), (ii) and (iii).
(III) A vigorous reaction will take place in beaker (i) while no reaction will occur in beaker II.
(IV) Two different gases will be evolved in beaker (iv).
The correct observations are:

1. II, III and IV only
2. I and III only
3. II and III only
4. II and IV only

Q. Aqua-regia was so named by alchemists because it can dissolve noble metals like gold and platinum. Can you identify the proper composition of Aqua-regia from the given options?

1. $1HN{O}_3+3HCl$
2. $1HCl+3HN{O}_3$
3. $1HCl+1HN{O}_3$
4. $1HN{O}_3+2HCl$

Q. What is the first thing a chemistry student do if flames start coming out of the bottom of a Bunsen Burner?

1. Adjust the collar.
2. Adjust the flow rate of the gas.
3. Notify the instructor.
4. Find the fire extinguisher.
5. Turn off the gas supply.

Q. Identify the gas which is liberated when a reactive metal reacts with an acid.

1. Oxygen
2. Hydrogen
3. Carbon dioxide
4. Carbon monoxide

Q. What is the volume ratio of nitric acid to hydrochloric acid in Aqua-regia?

1. $1HCl+1HN{O}_3$
2. $1HCl+3HN{O}_3$
3. $1HN{O}_3+3HCl$
4. $1HN{O}_3+2HCl$

Q. Aqueous $ZnO$ can neutralise $HCl$ as wll as $NaOH$ solution. Thus, $ZnO$ is an

1. acidic oxide
2. basic oxide
3. amphoteric oxide
4. amphiprotic oxide