GATE Questions

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Many types of renewable energy resources such as wind and solar energy are constantly replenished and will never run out.

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

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.

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.

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.

Obsession is to compulsion as cognition is to behavior.

The given series is 1000, 1012, 988, 1024, 978

1000

1000 + 12 = 1012

1012 - 24 = 988

988 + 36 = 1024

1024 - 48 = 976 (Not 978)

The freezing point of water and melting point is 0 °C or 32 °F. The temperature may be lower if supercooling occurs.