Question # 1

Following are elements of 2nd period.Which atom is bigger in size?

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Li

Be

B

C

At ____________ °C water converts to ice.

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101°

100°

99°C

100.2°C

The base of modern periodic table is

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Atomic number (Z)

Mass number (A)

Avogadro's Number

Quantum Number

Which of the following compound is not directional in its bonding?

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CH⁴

KBr

CO²

H₂O

Which one is largest?

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Exo

Peta

Atto

Pico

Water is a ____________ covalent compound .

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Polar

Non polar

Ionic

Nil

CO2 the oxidation number of C =.

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+1

+2

+3

+4

________________ observed that formation of covalent bonds.

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Rutherford

G.N Lewis

Both a and b

Bohar's

Which is used for industrial manufacture of NaCI?

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Daniel cell

Down's cell

Nelson's cell

None of these

Which one is a solution?

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Carbonated drinks

Sugar

Benzene

Vineger

Non-metals do not reaction with

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Strong bases

Concentrated acids

Dilute acids

Salts

The component of solution in larger amount is .

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Solute

Solvent

A & B

nIL

The property of being polar in nature is called:

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Polarity

Chemistry

Both

Nil

Atoms as a whole is _________

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+

_

No

Neutral

The elements of group 17 are called:

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Carbon family

Noble gases

Alkaline earth metals

Halogen family

The value of Planck's constant is

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6.63 x 10-34 Js

6.63 x 10-32 Js

6.63 x 10-30 Js

6.63 x 10-28 Js

____________ of copper is done by electrolysis.

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Production

Refining

Both

Nil

Transition temperature of sulphur is ____________

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95.6

95

95.5

96

Electrolyte is ____________ solid form.

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in

Sometimes in

Never in

Always in

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