Question # 1

The net heat change in a chemical reaction is the same whether it is brought about in two or more different ways in one or several steps.it is known as

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Henry's law

Hess's law

joule's law

Law of conservation of energy

All of the following are primary aminoacids except

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Cysteine

Cystine

Alanine

Arginine

In diamond, which hybridization is there?

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sp2

dsp2

sp3

sp

Potable water is considered to be:

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safe for human consumption

the ground water

the Surface water

now water is due to the salt of:

The substance upon which an enzyme acts is known as its

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domain

field

substrate

reactant

The pH of neutral water is 6.8 then the temperature of H2O is

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25°C

More than 25°C

less than 25 C°

Not predicted

Which order of vapour pressure in the following liquids is correct

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water > ethanol > acetone > ether

ether > acetone > ethanol > water

ether > ethanol > acetone > water

water > ether > acetone > ethanol

Which of the following has isomorphous structure with MgO

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NaF

S

Sn

N

Which of the following gas will have lowest rate of diffusion

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CH₄

N₂

NH₃

CO₂

Which of the following wast material is not recycled for use again?

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glasses

paper

plastic toys

hides of animals

One of the following metals is the most reactive and form super oxide. Indicate that

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Mg

K

Be

Li

Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water

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Low value

Higher value

Both values

None of these

Charge on electron was discovered by:

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Millikan.

Crook.

Neil Bohr.

Rutherford.

The relative lowering of vapour pressure is equal to the mole fraction of the solute, This law is called

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Henry's law

Raoult's law

Ostwald's law

Arrhenius law

The addition of HBr is easiest with

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CH2 = CHCl

CICH = CHCl

CH3 - CH = CH2

(CH3)2 C = CH2

Which element forms an iron with charge 3+?

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Berylium

Aluminium

Carbon

Silicon

Ecology is a science of environment and deals specially with

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Stratosphere

Biosphere

Lithosphere

Hydrosphere

1-Chlorobutane on reaction with alcoholic potash gives

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But 1-ene

Butan-1-ol

But-2-ene

Butan-2-ol

Potassium chromate has formula

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KClO₃

K₂CO₃

K₂CrO₄

K₂Cr₂O₇

Reason of pollution are:

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Population and Urbanization

Transportation

Urbanization industrialization

All of these

Hydrocarbons are divided into aliphatic, alicyclic and aromatic which structure among the following show an alicyclic hydrocarbon

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Two or more similar monomers combine to form:

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Homopolymer

Copolymer

Ter Polymer

Thermoplastic polymers

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