question bank

General Science & Ability

300

questions

217.

Why is water often called a universal solvent?

Because it dissolves more substances than any other liquid

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218.

What is the chemical formula of water?

H2O

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219.

What is a chemical element?

A substance that cannot be decomposed into simpler substances by ordinary chemical processes

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220.

Which type of lens is thinner at the centre than at the edges?

Concave lens

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221.

Which type of lens is thicker at the centre than at the edges?

Convex lens

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222.

What happens when opposite magnetic poles are brought together?

They attract each other

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223.

What happens when two like magnetic poles are brought together?

They repel each other

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224.

Which two poles does a magnet have?

North and south poles

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225.

What simple machine is a sloping surface used to raise or lower loads?

Inclined plane

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226.

What is the fixed pivot point of a lever called?

Fulcrum

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227.

What simple machine consists of a rigid bar that pivots around a fixed point?

Lever

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228.

What is convection?

Transfer of heat by the bulk movement of a fluid such as a liquid or gas

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