Question # 1

Whcih of the following atoms willnot form cation or anion.

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Atomic no. 16

Atomic no. 18

Atomic no. 17

Atomic No. 19

Which of the following cannot be classified as Arrhenius acid

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CO2

HNO3

H2CO3

H2SO4

When molten copper and olten zinc are mixed together , they give rise to a new substnce called brass. Predict what type of bond is formed between copper and zinc.

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Ionic bond

Coordinate Covalent bond

Metallic bond

Covalent Bond

Mass Number is repreented by

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Z

S

A

M

Metals can form ions carrying carges.

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Uni positive

Di positive

Tri postive

All of these

A bond formed between two non metals is expected to be

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Ionic

Coordinate covalent

Metallic

Covalent

Carbon -14 is used for the

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Growth of bones

Diagonosis of goiter

Age determination of old objects

All of these

The elements of group 3 to 12 are clled.

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Normal elements

Halogens

Noble gases

Transition elements

When new bonds ae formed, the energy is

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Consume

Remain same

Release

None of these

The mass of one molecule of water is.

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18 g

18 mg

18 kg

18 amu

The enthalpy of reaction C+O2 ------ CO2

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-571.6 kJ

-393.5 kJ

+53.8 kJ

-110.5 kJ

How many electrons can nitrogen accept in its outermost shell.

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2

3

4

5

Which is used to manufacture soap?

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NH4OH

Ca(OH)2

NaOH

Mg(OH)2

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