set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Which of the following is not an ore?

a) Zinc blende

b) Bauxite

c) Malachite

d) Pig iron

Question : 2

Bauxite is the ore of

a) Aluminium

b) Copper

c) Iron

d) Gold

Question : 3

These days yellow lamps are frequently used as street light. Which one of the following is used in these lamps?

a) Neon

b) Hydrogen

c) Sodium

d) Nitrogen

Question : 4

Which of the following statement regarding non-metals is true?

a) Non-metals are non-lustrous with dull apppearence. Graphite, an allotrope of carbon and iodine have shining lustrous surfaces.

b) Non-metals are of two types only solids and gases.

c) Non-metals reacts with oxygen to form basic oxides generally.

d) Non-metals replace hydrogen from acids.

Question : 5

Which of the following have low melting and boiling points?

a) Iron

b) Phosphorus

c) Sodium

d) Both (b) and (c)

Question : 6

Pure gold is –

a) 20 carats

b) 24 carats

c) 22 carats

d) 18 carats