Question # 1

Potassium's atomic no. is :

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17

18

19

20

1 atm = ?

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1 pascal

760 mm of Hg

1 atm

1 Nm^-2

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

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catalyst

coolant

reactant

absorber

Gain of electrons in a reaction is called ____________reaction.

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Oxidation

Reduction

Both

Nil

Which one of the following will show negligible effect of temperature on its solubility?

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KCI

KNO³

NaNO³

NaCI

Alpha particles are double charged.

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Negative

Positive

Can be both

Nil

The atomic number is represented by ____________

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A

Y

X

Z

Free radical is a

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Extremely stable

Extremely reactive

Extremely inert

All of these

Which one of the following is heterogeneous mixture?

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milk

ink

milk of magnesia

sugar solution

The quantity of a matter in a body is called ____________

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Mass

Weight

Atom

Molecule

The mathematical formula of Charle's law is:

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PV = k

V/T = k

P = VT

T/V = k

Graphite is ___________

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Hard

Nil

Soft

Nil

Reduction means

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Removal of H2

Removal of electrons

Gain of electrons

Gain of O2

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