Question # 1

Non-metals are generally soft, but which one of the following is extremely hard?

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Graphite

Phosphorus

Iodine

Diamond

The core of the earth is ____________ than crust.

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LIghter

Heavier

Both

Nil

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

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Phosphorous

Sulphur

Graphite

Iodine

Which one is the following belongs no Noble Gases?

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O

F

Ne

Nil

Which of the following is less malleable?

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Sodium

Iron

Gold

Sliver

Which one of the following metals burns with a brick red flame?

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Sodium

Magnesium

Iron

Calcium

Non-metals do not reaction with

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Strong bases

Concentrated acids

Dilute acids

Salts

Which one of the following is brittle?

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Sodium

Aluminum

Selenium

Magnesium

Metals lose their electrons easily because:

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They are electronegative

They have electron affinity

They are electropositive

Good conductors of heat

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

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catalyst

coolant

reactant

absorber

Oxygen is ___________

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Metals

Non-metals

Gas

b & c

Metal can form ions carrying charges:

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Uni-positive

Di-positive

Tri-Positive

All of them

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9th Class Chemistry Chapter 8 Chemical Reactivity English Medium KPK Boards Online Mcqs MCQs With Answers

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