Chemistry - MOST IMPORTANT CDS Previous Year Questions

Which of the following statements about Prof. C. N. R. Rao is/are correct? 1. He is considered to be an international authority in solid-state and structural chemistry. 2. He is the first Indian to reach the H-index of 100, reflecting the economy of the body of his published research work. Select the correct answer using the code given below

Addition of ethylene di-bromide to petrol

Date of manufacture of food items fried in oil should be checked before buying because oils become rancid due to

Which method of water purification does not kill microorganism?

Iron sheet kept in moist air gets covered with rust. Rust is

Nitric oxide pollution can lead to all of the following, except

Which one of the following elements is present in green pigment of leaf?

Which one of the following gases is supporter of combustion?

Which of the following solutions will not change the colour of blue litmus paper to red? 1. Acid solution 2. Base solution 3. Common salt solution Select the correct answer using the code given below

Deficiency of which of the following elements is responsible for weakening of bones? 1. Calcium 2. Phosphorus 3. Nitrogen 4. Carbon Select the correct answer using the code given below

What causes dough (a mixture of flour, water, etc.) to rise when yeast is added to it?

Which of the following are the two main constituents of granite?

Two strands of DNA are held together by

Tungsten is used for the construction of filament in electric bulb because of its

Inactive Nitrogen and Argon gases are usually used in electric bulbs in order to

The distribution of electrons into different orbits of an atom, as suggested by Bohr, is

Carbon or Graphite rods are used in atomic reactors as moderators for sustained nuclear chain reaction through nuclear fission process. In this process

Which one of the following types of pesticides is convenient to control stored grain pests?

Bagasse, a by-product of sugar manufacturing industry, is used for the production of

The main constituent of Gobar gas is