Question # 1

There are _________ types of solids

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1

2

3

4

What is correct about heat of combustion

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It is applicable to gaseous substances only

It is always negative

It is always positive

It is positive in some cases while negative in other

Which of the following is a steroid?

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vitamin A

vitamin B

vitamin C

vitamin D

New3spapers can be recycled again and again by how many times?

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5

3

2

4

Which one of the following elements is the strongest reducing agent?

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Chlorine

Sodium

Magnesium

Aluminium

Matter having no definite shape and volume is called:

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gas

liquid

solid

plasma

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will not cause water pollution

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live stock waste

agricultural pesticides

oil beaks and spills

all of the above

The cell which converts electrical energy to chemical energy is called

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Electrochemical cell

Voltaic cell

Galvanic cell

Down's cell

Which of the following category of enzyme catalyze addition of Ammonia

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Ligases

Lyases

Isomerases

Pepsinogen

Which of the following laws study the pressure-volume relationship of a gas at constant temperature,we get

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a straight line

a curve with different peaks

straight line parallel to x-axis

a curve called isotherm

Volume of O₂gas at 0°C is 273 cm³, then volume of O₂gas at -10°C is

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263 cm³

163 cm³

173 cm³

73 cm³

Ozone depletion in stratosphere shall result in

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Forest fires

Increased incidence of skin cancer

Global warming

None of the above

The rate equation for a reaction is Rate =k[A]. what are unit of K ?

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Mole-1 dm³ S^-1

Mole dm³ S^-1

Moledm³

S^-1

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Primary alkyl halide

Secondary alkyl halide

Tertiary alkyl halide

None of these

Corrosion of iron can be prevented by coating the surface with

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Zn

Sn

Ni

Any of the above

Which of the following species has unpaired electrons in antibonding molecular orbitals

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Which element does not belong to 3d transition series

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Ti

V

Mn

Te

Which salt is used for the treatment of hyperacidity in stomach

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NaCl

KCl

NaHCO₃

Na₂CO₃

Dow's process is used for the preparation of

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Ester

Ethers

Alcohols

Phenols

Benzene is obtained from benzene sulphonic acid by treating with

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HCl

NaOH

H₂O

NaHCO₃

Which of the following elements is most electronegative?

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Oxygen

Chlorine

Nitrogen

Fluorine

When 3p orbital is complete, the entering electron goes into

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4s

3d

4p

4f

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