How Do Metal React with Solution of Other Metal Salts

Q. In the following reaction, identify the substance, ‘X’ from the given options.
$Fe+CuS{O}_4\to X+Cu$

1. $FeS{O}_4$
2. Fe-Cu
3. FeS
4. CuS

Q. Which of the following metals should be chosen to react with $CuS{O}_4$ solution to make its colour change from blue to green?

1. Copper (Cu)
2. Iron (Fe)
3. Gold (Au)
4. Lead (Pb)

Q. Statement 1: Metal $\text{A}$ displaces metal $\text{B}$ from its salt solution.
Statement 2: Metal $\text{A}$ is above metal $\text{B}$ in the reactivity series.

Choose the correct option from the following.

1. Both statements are correct. Statement 2 is not the correct explanation for statement 1.
2. Both statements are correct. Statement 2 is the correct explanation for statement 1.
3. Only Statement 1 is correct
4. Only statement 2 is correct

Q.

An electric lamp rated 250V, 50W. Calculate the resistance of the filament.

1. 12Ω

2. 1250 Ω

3. 122 Ω

4. 500 Ω

Q. State whether the following reaction is True or False.
Statement: Metal A + Salt solution of Metal B $\to$ Salt solution of Metal A + Metal B
(Assume Metal A is higher in the reactivity series than B).

1. True
2. False

Q. In the given reaction, $M_A$ is a metal A and $M_B$ is a metal B. Choose the correct options regarding the reactivities of $M_A$ and $M_B$.
$M_A+Saltof{M}_B$
$\to M_B+Saltof{M}_A$

1. $M_B$ is more active than $M_A$
2. $M_A$ is more active than $M_B$
3. $M_A$ and $M_B$ are equally active
4. There is not enough information to determine which metal is more active

Q.

Mercury + sulphuric acid $\to$ No reaction. This is because of :-

1. Mercury is below hydrogen in reactivity series.

2. Mercury is above hydrogen in reactivity series.

3. Mercury is a liquid.

4. Sulphuric acid is a weak acid.

Q.

Among the following, the rate of formation of bubbles, when it is reacted with acid, is fastest in case of _________.

1. Mg

2. Al

3. Fe

4. Zn

Q.

Zinc + _______ $\to$ Zinc oxide.

1. Cold water

2. Hot water

3. Steam

4. Chlorine gas.

Q. Sodium is less reactive than copper.

1. True
2. False