NDA 2018 Paper 1 | Chemistry Question 99 | General Science

General Science

Physics

Chemistry

Biology

NDA 2018 Paper 1

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following is not true for bleaching powder?

It is used as a reducing agent in chemical industries

it is used for bleaching wood pulp in paper factories

It is used for disinfecting drinking water

It is used for bleaching linen in textile industry

NDA 2018 Paper 1

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following is the number of water molecules that share with two formula unit of CaSO₄ in plaster of Paris?

One

Two

Five

Ten

NDA 2018 Paper 1

MCQ (Single Correct Answer)

+2.5

-0.83

How is carbon black obtained?

By heating wood at high temperature in absence of air

By heating coal at high temperature in absence of air

By burning hydrocarbons in a limited supply of air

By heating coal at high temperature in presence of air

NDA 2018 Paper 1

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following properties is not true for graphite?

Hybridisation of each carbon atom is sp³

Hybridisation of each carbon atom is sp²

Electrons are delocalised over the whole sheet of atoms

Each layer is composed of hexagonal rings

Questions Asked from Marks 2.5