Question # 1

The maximum hydrogen bonding is in:

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diethyl ether

ethanol

water

benzene

Chlorofluorocarbons and aerosols are inert in sphere:

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troposphere

stratosphere

lithosphere

hydrosphere

Diffusion of different species is due to difference of

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potential energy

temperature

density

all the above

Total number of possible chain and positional isomers of butyl alcohol among alcohols are

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Four

Five

Two

Six

Fe+2 is the co-factor for

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Chrome oxidase

Glucose-6-phosphatase

Carbonic anhydrase

Hydrolase

The distribution of energies among the molecules of gases was studied by:

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Maxwell

Coulomb

Newton

Boltzmann

In which of these processes are small organic molecules changed into macromolecules?

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the fractional distillation of crude oil

the cracking of petroleum fractions

the hydrolysis of proteins

the polymerization

A peptide having molecular mass of more than 10,000 is called as

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Fat

Vitamin

Carbohydrate

Proteins

Identify the compound, which give iodoform test

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Methanol

3- Hexanol

Methyl ketone

Propionaldehyde

Fine powder gypsum is mixed with clinker up to:

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4%

6%

5%

7%

The disposal of domestic refuse, commercial and industrial solid wastes are studied under the title

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Solid waste management

Waste management

Solid management

Semisolid management

The heat energy change during a chemical reaction at constant pressure and at a given temperature is called

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Change in internal energy

Enthaply change

Temperature change

Work done by the system

The total number of orbitals possible for the quantum number n is

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n

n²

2n

2n²

During the process of crystallization, the hot saturated solution:

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is cooled very slowly to get large size crystals

is cooled at a moderate rate to get medium sized crystals of the product

is evaporated to get the crystals of the products

is mixed with an immiscible liquid to get the pure crystals of the product.

Naphthalene, iodine and NH_{4 can :}

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Sublime.

Both (a) and (c).

Crystallize.

None of above.

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Proton donar

Dehydrating agent

Catalyst

Electrophile

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic

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It attaches to sulphur of the disulphide link

Hg is a heavy metal

Hg is liquid at room temperature

Hg is non reactive chemically

Isopropyl alcohol on oxidation gives

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Acetone

Ether

Ethylene

Acetaldehyde

Polyester resins have special use in:

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Clothing

Paints

Emulsion

Floor covering

According to the periodic law, the chemical properties of the elements are periodic functions of their

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Density

Atomic number

Atomic mass

Mass number

Which has highest 1st I.E.

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Br

Cl

F

l

The % of CO₂is the atmosphere is

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3.0%

0.03%

0.3%

0.5%

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