Question # 1

Which Isotopes is commonly used to irradiate cancer cells.

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Cobalt -60

Iodine-23

Carbon -14

Iodine-131

Which group of the periodic table has the tendency to gain electrons.

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Group -1

Group -17

Group-2

Group -18

The unit of ionization energy is

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nm and pm

kJ mol-1

Pascal

Newton

The percentage of ²³⁸ U ₉₂ found in nature.

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97%

0.72%

98%

1.5%

Whcih compound contains both covalent and ionic bonds.

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MgCl₂

PCl5

NH₄Cl

CaO

The colour of hydrated copper (II) sulphate solid is.

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Black

Pink

White

Blue

The branch of chemistry that is concerned with the large scale production of chemical substances is.

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Environemantal chemistry

Inorganic chemistry

Physical Chemistry

Industrial chemistry

What is the mass of AI in 204 g of aluminium oxide Al₂O₃

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26 g

54 g

108 g

27 g

A sub sheel that cna accommodate 6 electrons is

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b

s

f

p

Which compound is used a thinner is paint industry?

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H2O

C2H3OH

CH3COOC2H5

CH3COOH

The amoutn of energy given out when an electron is added to an eatom is called.

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Electron affinity

Lattice energy

Ionization energy

Electronegativity

Number of peiod in the periodic table are.

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7

8

5

16

When a chemical reaction is carried out with a substancZ; a gas is produced which turns red litmus paper blue. What is the reaction?

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Reaction of an acid with a meal carbonate

Reactin of an alkali with ammonium salt

Reaction of an acid with ammonium salt

None of these

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