Grade 10 : Science - 3. Metals/Non-Metals (Set 1) | Concept of Maths

Question 1

Which of the following metallic elements is unique for existing as a liquid at standard room temperature ($25^\circ C$)?

Accepted Answer

B) Mercury (Hg)

Answer

A) Sodium (Na)

Answer

C) Gallium (Ga)

Answer

D) Silver (Ag)

Question 2

What is the chemical formula of the hydrated oxide layer formed during the rusting of Iron?

Accepted Answer

C) $Fe_2O_3 \cdot xH_2O$

Answer

A) $Fe_2O_3$

Answer

B) $Fe_3O_4$

Answer

D) FeO

Question 3

When non-metals like Carbon or Sulfur burn in oxygen, they form oxides. These non-metallic oxides are generally:

Accepted Answer

B) Acidic in nature

Answer

A) Basic in nature

Answer

C) Neutral in nature

Answer

D) Amphoteric in nature

Question 4

Although non-metals are typically poor conductors of electricity, which crystalline allotrope of Carbon is an exceptionally good conductor?

Accepted Answer

C) Graphite

Answer

A) Diamond

Answer

B) Fullerene

Answer

D) Coal

Question 5

Which highly reactive alkali metal is stored immersed in kerosene oil to prevent violent reactions with atmospheric moisture and air?

Accepted Answer

B) Sodium (Na)

Answer

A) Iron (Fe)

Answer

C) Gold (Au)

Answer

D) Copper (Cu)

Question 6

An amphoteric oxide is a metal oxide that reacts with:

Accepted Answer

C) Both acids and bases to produce salt and water

Answer

A) Only strong acids

Answer

B) Only strong bases

Answer

D) Neither acids nor bases

Question 7

Which of the following non-metals is a liquid at room temperature?

Accepted Answer

A) Bromine ($Br_2$)

Answer

B) Chlorine ($Cl_2$)

Answer

C) Iodine ($I_2$)

Answer

D) Oxygen ($O_2$)

Question 8

When a moderately reactive metal like Zinc (Zn) reacts with dilute Hydrochloric Acid (HCl), which gas is evolved?

Accepted Answer

C) Hydrogen ($H_2$)

Answer

A) Oxygen ($O_2$)

Answer

B) Carbon dioxide ($CO_2$)

Answer

D) Nitrogen ($N_2$)

Question 9

The physical property that allows metals to be beaten into extremely thin foils (such as gold or aluminum foils) is known as:

Accepted Answer

B) Malleability

Answer

A) Ductility

Answer

C) Sonority

Answer

D) Conductivity

Question 10

Which of the following least reactive metals does not react even with steam or boiling water?

Accepted Answer

D) Gold (Au)

Answer

A) Sodium (Na)

Answer

B) Calcium (Ca)

Answer

C) Iron (Fe)