Question # 1

The atomic number of potassium is:

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11

15

18

19

Alpha particles are double charged.

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Negative

Positive

Can be both

Nil

Who discovered the proton?

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Goldstein

J.J Thomson

Neil Bohr

Ruther Ford

The symbol of lead us

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As

Pb

Sb

Na

The most abundant element occurring in the oceans is:

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Oxygen

Hydrogen

Nitrogen

Silicon

Reduction means

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Removal of H2

Removal of electrons

Gain of electrons

Gain of O2

Which has metallic bond?

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H

Na

HCI

P

Hydrogen is a ____________

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Metal

Non metal

Metalloids

Nil

Oxidation means

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Gain of oxygen

Removal of oxygen

Gain of hydrogen

Gain of electrons

Which one is not a property of electrolytic cell?

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It consists of one complete cell

Anode has +ve charge

It converts electrical energy into chemical one

Anode has -ve charge

________________ orbital is more complex in shape.

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s

p

f

d

H° - H° has ________________ energy.

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Lower

Higher

Medium

Nil

The vapour pressure of a liquid increase with the:

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increase pressure

increase of temperature

increase of intermolecular forces

increase of polarity of molecules

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