NDA 2019 Paper 2 | Chemistry Question 108 | General Science

General Science

Physics

Chemistry

Biology

NDA 2019 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following compounds does not exhibit a different oxidation number of the same element?

Pb₃O₄

Fe₃O₄

Fe₂O₃

Mn₃O₄

NDA 2019 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following statements about glass is not correct?

Glass is often said to be a supercooled liquid.

Glass has no definite melting point.

Soda glass is harder than pyrex glass.

Boron is present in pyrex glass.

NDA 2019 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following statements is correct?

Both boiling and evaporation are surface phenomena.

Boiling is a surface phenomenon, but evaporation is a bulk phenomenon.

Both boiling and evaporation are bulk phenomena.

Boiling is a bulk phenomenon, but evaporation is a surface phenomenon.

NDA 2019 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following statements about diamond and graphite is not correct?

Diamond has a tetrahedral structure, whereas graphite has a hexagonal planar structure.

Both physical and chemical properties of diamond and graphite are different.

Graphite is soft, but diamond is hard.

Graphite is a good conductor of electricity, while diamond is not.

Questions Asked from Marks 2.5