set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Which one of the following metals does not form amalgam?

a) Iron

b) Magnesium

c) Zinc

d) Copper

Question : 2

Burning of Hydrogen produces

a) Water

b) Soil

c) Oxygen

d) Ash

Question : 3

What is the shape of sulphur hexafluoride molecule?

a) Octahedral

b) Planar

c) Trigonal pyramid

d) Tetrahedral

Question : 4

Consider these statements and choose the right answer from counterfeit.
Statement (A):
Normally it has been seen that iron goods covered with a brown powder called rust when they are unsheltered in the atmosphere.
Statement (R):
Rust or the brown powder is the result of deposition Tannin.
Code

a) (A) is false, but (R) is trues

b) (A) is true, but (R) is false

c) Both (A) and (R) are true and (R) is the correct explanation of (A)

d) Both (A) and (R) are true, but (R) is not the correct explanation of (A)

Question : 5

Which lubricant is used for heavy machines?

a) Silicon oil

b) Bauxite

c) Phosphorus

d) Graphite

Question : 6

Percentage amount (by volume) of which one of the following gas is lowest in the atmosphere?

a) Carbon dioxide

b) Nitrogen

c) Argon

d) Oxygen