Question # 1

The colour of calcium metal flame is

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Golden yellow

Brilliant white

Brick red

Light green

Sodium - potassium alloy is used in nuclear reactor as a:

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catalyst

coolant

reactant

absorber

Which one is moderate reactive metal?

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Pb

Na

Ca

Mg

Which of the following is less malleable?

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Sodium

Iron

Gold

Sliver

Non-metals do not reaction with

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Strong bases

Concentrated acids

Dilute acids

Salts

Which one metal can be cut with a knife?

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Na

Mg

AI

Ca

Which one of the following non-metal is lustrous?

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Sulphur

Phosphorus

Iodine

Carbon

All are noble metals except:

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Silver

Gold

Hydrogen

Platinum

All non-metals are non-conductor of heat and electricity except it

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Phosphorous

Sulphur

Graphite

Iodine

Silver is a ____________ metal.

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Pure

Noble

None

All

The core of the earth is mostly made from ____________

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Nickel

Iron

A % B

Copper

Metals lose their electrons easily because:

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They are electronegative

They have electron affinity

They are electropositive

Good conductors of heat

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