Question # 1

The transition temperature of sulphur is:

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96 °C

250 °C

18 °C

218 °C

Which one of the following is liquid in solid solution?

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sugar in water

butter

opal

fog

The mathematical formula of Boyle's law is:

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PV = k

PT = k

V = kT

T = Vk

The number of isotopes of carbon are

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1

2

3

5

Potassium's atomic no. is :

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17

18

19

20

_________ which occupies space and have mass.

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Matter

Atom

Molecule

All of above

..................... is property of metals.

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Gases

Lustrous

Solids

Nil

Which is a polar molecule?

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HCI

H₂

CI₂

O₂

In a discharge tube, the pressure of a gas is kept at

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10-2 atm

10-4 atm

10-6 atm

10-8 atm

D-block consists of:

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4th,5th & 6th periods

2nd, 3rd & 4th periods

1st, 2nd, & 3rd periods

Along the period which one of the following decrease:

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Atomic radius

ionization energy

electron affinity

electronegative

Pure alkali metals can be cut simply by knife but iron cannot because of alkali metals have:

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Strong metallic bonding.

Weak metallic bonding

Non- metallic bonding

Moderate metallic bonding

The mixture of two component is called .

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Homogeneous mixture

Binary solution

Both a & b

Nil

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