Metals and Non-metals

Select the metal which exists in liquid state at room temperature.

• Mercury

• Sodium

• Bromine

• Gallium

Identify the given metal which melts on the palm of our hand

• Mercury

• Sodium

• Potassium

• Gallium

An element oxide, X undergoes the following reactions:

X + Acid -> Salt + Water

X + Base -> Salt + Water

Is the oxide X an amphoteric oxide?

• Yes

• No

Which of the following are examples of Amphoteric Oxides?

(Select all that apply)

• ZnO

• MgO

• Al₂O₃

• Na₂O

The Electronic Configuration of Sodium (Z=11) is ______

• 2, 9

• 2, 8, 1

• 2, 7, 2

• 2, 5, 4

Metals generally react with dilute acids to liberate hydrogen gas.

Except with an acid X, metals do not liberate hydrogen gas. Which is that acid?

• H₂SO₄

• HCl

• HNO₃

• H₂CO₃

A metal E is stored in kerosene. When a small piece of it is left in open in air, it catches fire. When the product formed is dissolved in water, it turns red litmus to blue.

A. Identify the metal

B. What is the product formed when the metal E is put in water?

(Select correct answers for A and B)

• A. Magnesium

• B. Magnesium Oxide

• A. Sodium

• B. Sodium Hydroxide

• B. Sodium Oxide

Name a metal which is a poor conductor of heat.

Cu is less reactive than sodium. Which of the following reactions will occur?

( Select 2 answers)

• A

• B

• C

• D

Which of the following is NOT a chemical property of a metal?

• Metals generally have basic oxides.

• Metals react with dilute acids to liberate hydrogen gas.

• Metals are electropositive in nature, i.e. they donate electrons

• Metals are electronegative in nature, i.e. they accept electrons.