Reactivity Series of Metals

Q.

You are provided with two containers made up of Copper and Aluminum. You are also provided with a solution of dil. $\mathrm{HCl}$, dil. ${\mathrm{HNO}}_3$, and ${\mathrm{H}}_2\mathrm{O}$. In which of the above containers, these solutions can be kept?

Q.

Zinc liberates hydrogen gas when reacted with dilute hydrochloric acid, whereas copper does not. Explain why?

Q.

Which of the following metals can be used for liberating hydrogen from dilute hydrochloric acid? Write reactions as well.

1. Zinc
2. Copper
3. Iron
4. Silver
5. Magnesium

Q. Arrange the following elements in an ascending order of their reactivities
(Ag , Na , Fe , Ca)

1. Ca < Fe < Na < Ag
2. Ag < Na < Fe < Ca
3. Ag < Fe <Ca < Na
4. Ca < Fe < Ag < Na

Q. Among the given metals, the metal which will get displaced from its salt solution by other three metals is:

1. Magnesium
2. Zinc
3. Copper
4. Silver

Q.

The figure represents the reactivity of metals. Which of the following statements are correct?

(i) Sodium is more reactive than magnesium.

(ii) Magnesium and aluminium can displace lead.

(iii) Magnesium and aluminium can displace calcium.

(iv) Iron and tin can displace magnesium.

(v) Most reactive metal is sodium.

(vi) Gold is least reactive.

(vii) Calcium and zinc can displace iron.

1. (ii), (v), (vi), and (vii)
2. (ii), (iii), (vi), and (vii)
3. (i), (ii), (v), and (vi)
4. (i), (ii), (vi), and (vii)

Q.

Action of dilute acids on metals

(b) Fe + H₂SO₄ 🡪

Q.

245. Action of dilute acids on metals

(c) $\mathrm{Cu}+{\mathrm{H}}_2{\mathrm{SO}}_4\to$

Q. Which of the following metals exist in its native state on Earth?

1. Fe
2. Au
3. Al
4. Cu

Q. Silver occur in native state on the earth surface.

1. True
2. False

Q. Iron is less reactive than _____.

1. Hydrogen
2. Magnesium
3. Gold
4. Copper

Q.

Which of the following is incorrect with respect to metals?

1. The metals high up in the reactivity series are very reactive.

2. Metals above hydrogen in the activity series cannot displace hydrogen from dilute acids.

3. If one of the metals is mercury, then the alloy is known as an amalgam.

4. Metals reacts with dilute acid to form its salt and hydrogen gas.

Q. Beakers A, B, and C contain zinc sulphate, silver sulphate, and ferrous sulphate solutions respectively. Copper filings are added to each beaker. Blue colour will appear in which of the following beakers?

1. Beaker A
2. Beaker B
3. All the beakers
4. Beaker C

Q.

Which among the following metals will get corroded at the fastest rate on exposure to air and water is?

1. Iron

2. Copper

3. Gold

4. Zinc

Q. Which among the following is the least reactive metal?

1. Aluminium
2. Copper
3. Zinc
4. Iron

Q. The metals that are found in free state are generally present _______ of the activity series.

1. at the top
2. at the bottom
3. in the middle
4. above hydrogen

Q. When metal Z is added to dilute HCl solution, there is no evolution of gas. Metal 'Z' is:

1. potassium
2. sodium
3. silver
4. zinc

Q.

${\mathrm{Fe}}_2{O}_3\left(s\right)+\mathrm{Al}\left(s\right)\to \mathrm{Fe}\left(l\right)+{\mathrm{Al}}_2{O}_3\left(s\right)$
It can be inferred from the chemical equation given above that aluminium is more reactive than iron.

1. True
2. False

Q. Choose the correct pair of elements based on their reactivity.

1. Calcium
2. Silver
3. Tin
4. High Reactive
5. Medium Reactive
6. Less Reactive

Q.

• Which among $\mathrm{Cu}$, $\mathrm{Fe}$, $\mathrm{Mg}$, $\mathrm{Na}$ and $\mathrm{Zn}$ does not react with a dilute $\mathrm{HCl}$ solution?