General Knowledge Mock Test - 3 - CDS MCQ

Eight of the water-soluble vitamins are known as the vitamin B-complex group: thiamin (vitamin B1), riboflavin (vitamin B2), niacin (vitamin B3), vitamin B6 (pyridoxine), folate (folic acid), vitamin B12, biotin and pantothenic acid. The B vitamins are widely distributed in foods, and their influence is felt in many parts of the body.

Red Data Book is related with a complete list of all endangered species.

Bat is mammal not a bird.

White blood cells (WBC) bring out the function of body defence.

Beri-Beri is not insect borne disease. It is caused by the deficiency of vitamin- B₁ or thiamine.

Methane (CH₄) is produced in rice fields in the most prominent quantities. Because when organic matter decomposes without O₂ in the water logged rice paddies, bacteria in the water produce methane.

The carcinogen is any substance causing cancer. Benzene (C₆ H₆) is casue of bone marrow failure.

Somatotrophin is produced by the anterior pituitary. It is a peptide hormone that induces growth, cell reproduction and regeneration.

Total internal reflection is responsible for mirage formation in deserts.

Transformer is based on the principle of mutual induction.

Curvature of the earth does not allow the television signals to be received beyond a particular distance.

Velocity of raindrop increases until it reaches the terminal velocity.

X-rays cannot be deflected by magnetic field as they consists of no charge.

The permissible level is 50 dB.

Infrared rays helps in reading an old written material.

An Earthquake is the result of a sudden release of energy in the Earth’s crust that creates seismic waves.

A laser is a device that emits coherent light through a process called stimulated emission.

The correct answer is C good absorber and a good radiator.
Key Points

• A perfectly black body: A body that absorbs the entire radiation incident on it is called a perfectly black body.
  • The ratio of heat absorbed (radiation) to total incident radiation for a body is called absorptive power (a) of the body. It has no unit.
  • White colour is a bad absorber and good reflectors of heat radiation while black colour is good absorbers and bad reflectors of heat.
  • The ratio of emissive power and absorptive power of a body is always the same.
  • ​​It is equal to the emissive power of a black body. This is known as Kirchhoff’s law.

An α-particle is identical with helium nuclei. It consists of 2 protons and 2 neutrons and represented by ₂He⁴ .

Rayon is made from naturally occurring cellulose. Rayon is also called artificial silk.

The metals copper, silver gold and platinum are less reactive than hydrogen and they do not replace hydrogen from water or acid.

Nitric acid is used in the production of fertilizers. The principal chemical produced form nitric acids ammonium nitrate, sulphuric acid is used in the production of explosives like TNT, nitroglycerine, gun cotton, etc.

Baking soda has sodium bicarbonate as the chief constituent. It decomposes on heating giving carbon dioxide. This causes dough, cakes, biscuits etc. to expand and become light.

Amnesty International is a non-governmental organisation focused on human rights. It was founded in London in 1961 by the lawyer Peter Benenson. It draws attention to human rights abuses and campaigns for compliance with international laws and standards.

A very fine powder of ferric oxide is known as “jeweler’s rouge”, “red rouge”, or simply rouge. It is used to put the final polish on metallic jewellery and lenses, and historically as a cosmetic.

‘Misch metal’ alloyed with iron is used in the cigarettes lighters. Misch metal is an alloy of cerium (50%), lanthanum (25%), neodymium (18%), praseodymium (5%) and other rare metals.

Pure water is neutral in nature hence; the pH value of pure water is 7.

1. The Apatani-are a tribal group of people living in the Zero valley in the Lower Subansiri district of Arunachal Pradesh.

2. Bhutia people live particularly in Sikkim.

3. Gond people are a Dravidian people of central India spread over the states of Madhya Pradesh, eastern Maharashtra (Vidarbha), Chhattisgarh, Uttar Pradesh, Telangana and Western Odisha.

4. The Meetei people are an ethnic group of Kangleipak (Manipur).