In the periodic table, metalloids are found: MCQ with Answer and Explanation

In the periodic table, metalloids are found:
A. Only in group 18
B. Along the zigzag line separating metals and non-metals
C. Only in the f-block
D. In the s-block
Answer: Option B
Solution (By JKExamLibrary)
Metalloids (B, Si, Ge, As, Sb, Te) are located along the staircase line on the right side of the p-block, dividing metals from non-metals. They exhibit intermediate properties: semiconductors, brittle, can form alloys. They are in groups 13-17. The s-block contains reactive metals. Group 18 contains noble gases. f-block contains lanthanides and actinides.

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More chemistry Questions

Question #1
The hydrocarbon C₄H₁₀ is named:
A. Butane
B. Propane
C. Ethane
D. Pentane

Correct Answer: Option A


Explanation:
C₄H₁₀ is butane (n-butane or isobutane). Methane (CH₄), ethane (C₂H₆), propane (C₃H₈). It is used as LPG component.

This question belongs to: Science chemistry
Question #2
Which of the following gases is responsible for the formation of photochemical smog?
A. Carbon dioxide
B. Ammonia
C. Methane
D. Ozone and PAN

Correct Answer: Option D


Explanation:
Photochemical smog is formed in sunny, dry cities due to the reaction of sunlight with nitrogen oxides and volatile organic compounds (from vehicle exhaust). This produces secondary pollutants like ozone (O₃), peroxyacetyl nitrate (PAN), and aldehydes, which make up the harmful smog.

This question belongs to: Science chemistry
Question #3
The main component of cement that is responsible for the initial setting is:
A. Tetracalcium aluminoferrite
B. Tricalcium silicate
C. Tricalcium aluminate
D. Dicalcium silicate

Correct Answer: Option C


Explanation:
Tricalcium aluminate (C₃A) reacts quickly with water and is responsible for the flash setting of cement. Gypsum is added to control the rate of this initial set. Tricalcium silicate (C₃S) provides early strength. Dicalcium silicate (C₂S) gives later strength. Tetracalcium aluminoferrite (C₄AF) contributes to color and hardness. Cement composition is abbreviated in cement chemistry notation.

This question belongs to: Science chemistry