Question # 1

The beaker contains slurry of ice and water, the three thermometers Fahrenheit, Kelvin and centigrade placed init. the thermometers are represented as A, B and C respectively, On which thermometer the lowest reading will be?

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B

A

C

both A and B

Which one of the following is not an alicyclic compound?

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Cyclohexene

Cyclohexane

Benzene

Cyclopentane

Which of the following gas will have lowest rate of diffusion

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CH₄

N₂

NH₃

CO₂

The addition compound obtained by reacting acetaldelyde and HCN, when Iydrolyzed gives

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Ethyl alcohol

Methyl cyanide

2-Hydroxy propanoic acid

Ethyl cyanide

Nihydrin reacts with amino acid to give product of

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Bluish color

Violet color

Bluish violet color

No color

Depletion of ozone is more during the month:

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Jan-March

April-Jun

July-Aug

Sept-Nov

If a salt bridge is removed from two half cells the emf is

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Increased

Decreased

Dropped to zero

Electrodes will be reversed

Zinc reacts with dilute acids to liberate hydrogen. This is because:

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Zn2+ ion is a powertul osidising agent than H' ion

H+ ion is a powerful oxidising agent than Zn ion

Zn2+ ion is a powerful reducing agent than H' ion

H+' ion is a powerful reducing agent than Zn- ian

Which of the following liquid has higher boiling point?

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HCl

HBr

H₂O

Br₂

Molar volume of CO₂ is maximum at

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NTP

0°C and 2.0 atm

127°C and 1 atm

273°C and 2.0 atm

Absolute temperature of a gas is proportional to:

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Rotational Kinetic energy

Translational Kinetic energy

Vibrational Kinetic energy

Potential energy

During the mechanism of aldol condensation a/an ______ is formed

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Oxide

Alkali

Alkoxide ion

None of these

Boric acid cannot be used:

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An antiseptic in medicine

For washing eyes

In soda bottles

For enamels and glazes

Generally electron affinities for elements in a period from left to right

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Decreases

Increases

Remain same

Increases alternatively

The Zwitter ion is also called

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International salt

Internal salt

No salt

None of these

Which of the following is an isomer of ethanol

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CH₃OCH₃

C₂H₅OC₂H₅

CH₃OH

C₂H₅OH

If 5.85 g of NaCl are dissolved in 90 g of water, the mole fraction of NaCl is

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0.1

0.01

0.2

0.0196

Plastics are pollution problem because many plastics:

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Are made from petroleleum

Are very inflammable

Burn to produce toxic funes

Decompose to produce toxic products

Surfactants are organic compounds, used in detergents which reduce the

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Viscosity of water

Surface tension of water

Boiling point of water

Wetting ability of water

Micro-nutrients are required in quantity ranging from

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4g-40g

6g-200g

6Kg-200Kg

4Kg-40Kg

Benzene does not undergo

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Substitution reaction

Addition reaction

Oxidation reaction

Elimination reaction

The oxide of beryllium is

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Acidic

Amphoteric

Superoxide

Basic

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