Question # 1

Which of the following fluorides of xenon in impossible?

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XeF₂

XeF₃

XeF₄

XeF₆

The formula of calcium cyanamide is

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Ca(CN)₂

CaC₂N

CaNCN

CaCHNH₂

Water (H2O) is liquid while hydrogen sulphide (H₂S) is a gas because

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Water has higher molecular weight

Hydrogen sulphide is a weak acid

Sulphur has high electronegativity than oxygen

Water molecules associate through hydrogen bonding.

Natural fertilizer provides potassium in the form of K₂O (potash)

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1.5 kg

3 kg

4.5 kg

6.5 kg

The mass of the neutron is of the order of

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10^-23 kg

10^-24 kg

10^-26 kg

10^-27 kg

Sodium thiosulfate is used in photography because of its

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Oxidizing behaviour

Reducing behaviour

Complexing behaviour

Photochemical behaviour

The spectrum of helium is expected to be similar to that of

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H

Li⁺

Na

He⁺

Atmosphere of big/metropolitan cities is polluted most by

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Automobile exhausts

Pesticide residue

Household waste

Radio-active fall out

How many moles of Helium gas occupy 22.4 L at 0^oC at 1 atm.Pressure?

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0.11

0.90

1.0

1.11

The principle constituent of pyrex glass is

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Zn

B

Pb

CI

Ozone is not

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An allotrope

A powerful oxidizing agent

Paramagnetic

A bent molecule

Sea weeds are important source of

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Iron

Chlorine

Iodine

Bromine

The kinetic theory of gases predicts that total kinetic energy of a gaseous assembly depends on

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Pressure of the gas

Temperature of the gas

Volume of the gas

Pressure temperature and volume of the gas

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