Question # 1

The colour of calcium metal flame is

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Golden yellow

Brilliant white

Brick red

Light green

____________ Is drawn in wires.

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Gold

Silver

Helium

Nil

Sodium is exterminate reactive metal, but it does not react with:

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Hydrogen

Nitrogen

Sulphur

Phosphorus

Silver is a ____________ metal.

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Pure

Noble

None

All

The core of the earth is ____________ than crust.

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LIghter

Heavier

Both

Nil

Which one of the following non-metal is lustrous?

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Sulphur

Phosphorus

Iodine

Carbon

Which one metal is least reactive?

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K

Fe

Cu

AI

Hydrogen is a ____________

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Metal

Non metal

Metalloids

Nil

Which one is moderate reactive metal?

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Pb

Na

Ca

Mg

Electropositive character depends upon:

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Atomic size

Nuclear charge

Ionization energy

Electron affinity

Gold can only be dissolved by:

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Acids

Bases

Aqua Regia

Nil

Metals lose their electrons easily because:

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They are electronegative

They have electron affinity

They are electropositive

Good conductors of heat

The core of the earth is mostly made from ____________

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Nickel

Iron

A % B

Copper

The earth is made up of ___________ % of iron.

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4

5

6

7

Which one is the following belongs no Noble Gases?

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O

F

Ne

Nil

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Chemistry 9th Class English Medium Unit 8 Online Test MCQs With Answers

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