GATE Questions and Answers with Explanation

Q:

In a race of 200 m, A can beat B by 31 m and C by 18 m. In a race of 350 m, C will beat B by ?

A) 25 m	B) 21 m
C) 22 m	D) 19 m

Answer & Explanation Answer: A) 25 m

Explanation:

A:B = 200 : 169
A:C = 200 : 182
$\frac{C}{B} = \frac{C}{A} \times \frac{A}{B}$

$\frac{182}{200} \times \frac{200}{169}$

=> 182:169

When C covers 182 m , B Covers 169 m
When C covers 350 m , B Covers $\frac{169}{182} \times 350$
=> 325 m

So C beats B by (350 - 325) = 25 m.

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Filed Under: Time and Distance
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Q:

Which of the following is not a pure substance?

A) Oxygen	B) Carbon dioxide
C) Water	D) Milk

Answer & Explanation Answer: D) Milk

Explanation:

Milk is not a pure substance since it has so many constituents that can be separated physically.

Compounds are pure substances formed from elements unlike mixtures.

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Filed Under: Chemistry
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Q:

Conductivity in a metal results from the metal atoms having

A) highly mobile electrons in the valence shell	B) high electronegativity
C) high ionization energy	D) highly mobile protons in the nucleus

Answer & Explanation Answer: A) highly mobile electrons in the valence shell

Explanation:

The outer most electrons that are free to move are called valency electrons that are responsible for the conductivity in the metal atoms.

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Filed Under: Chemistry
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Q:

Covalent bonds hold atoms together because they

A) fill shells without giving atoms much charge	B) bring electrons closer to protons
C) Both A & B	D) use forces between nuclei as well as forces between electrons

Answer & Explanation Answer: C) Both A & B

Explanation:

Covalent bonds hold atoms together because the attraction between the positively charged nuclei and the negatively charged shared electrons is greater than the repulsions between the nuclei themselves.

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Filed Under: Chemistry
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Q:

I go around and in the house but never touches the house. What am I?

Answer

Te Sun.

From the time rising it goes around the house upto sunset, but never touches the house.

Workspace

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Q:

What place is designated as 0 degrees longitude?

A) Greenwich	B) Prime meridian
C) Tibet	D) Norway

Answer & Explanation Answer: A) Greenwich

Explanation:

The place which is designated as 0 degrees longitude is Greenwich, England.

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Filed Under: World Geography
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Q:

Which of the following is a characteristic of all minerals?

A) Crystalline solids	B) Minerals are inorganic
C) All minerals are formed in a natural process	D) All the above

Answer & Explanation Answer: D) All the above

Explanation:

Common properties of Minerals are :

1. All minerals are formed in a natural process.

2. Minerals are inorganic

3. Minerals are crystalline solids.

4. Every mineral is an element or compound with a definite chemical composition.

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Filed Under: General Science
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Q:

Obsession is to compulsion as cognition is to

A) behavior	B) emotion
C) Compulsion	D) None of the above

Answer & Explanation Answer: A) behavior

Explanation:

Obsession is to compulsion as cognition is to behavior.

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Filed Under: Analogy
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