Question # 1

Areal gas obeying Van der Waal's equation will resemble ideal gas ilf the:

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both a and b are large

both a and b are small

a is small and b is large

a is large and b is small

The enthalpy of formation of a compound is

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Positive

Either positive or negative

Negative

None

The molecular mass of a polymer is obtained by multiplying mass of the monomer unit with the degree of polymerization, The degree of polymerization of PVC is 1000.What is molecular mass?

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65000

63000

62000

60000

Which not a method for solid waste management>

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Landfill

Incinerating

Recycling

None of these

Which of spectral lines when atoms are subjected to strong electric field is called:

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Compton effect

Stark effect

Zeeman effect

Photoelectric effect

Pathogens in raw water are killed in step:

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aeration

coagulation

chlorination

treatment

The forces which are present between the ions and the water molecules are known as

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dipole-induced dipole forces

dipole-dipole forces

ion-dipole forces

London dispersion forces

Primary structure of proteins refers to

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Coiling and folding in form of specific structure

Number of amino acids in a chain

3d structure

Alpha and Beta sheets

The clotting time of blood is increased due to the deficiency of

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vitamin A

vitamin K

vitamin D

vitamin C

Which of the following is not a property of enzymes?

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extraordinary speciffcity

reversibility of reactions

high efficiency

minimum activity at optimum T

How many allotropic forms are present in carbon?

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Two

Four

Three

Five

Which carbon is more electronegative?

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sp³- hybridized carbon

sp-hybridized carbon

sp²-hybridized carbon

always same irrespective of its hybrid state

Oxalic acid oxidizes to:

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CO

CO₂

Oxalates

None of these

How much pesticides have been synthesized at present?

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Four thousands

Six thousands

Eight Thousands

Ten thousands

In which of the following reactions is the inorganic reagent acting as a nucleophile

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The uncertainty principle was stated only

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De Brogilie

Heinsenberg

Einstein

Schrodinger

Which of the following d-block elements can show the highest oxidation number in its compounds

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Chromium

Copper

Nickel

Manganese

When two hydrogen atoms approach to form a chemical bond

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The repulsive forces dominate the attractive forces

The attractive forces, dominate the repulsive forces

The energy of atoms increases

The two atoms start ionization

In the atomic emission spectrum the lines which appear bright, appear dark in absorption spectrum because

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The radiations emitted in emission spectrum are absorbed in absorption spectrum

Atomic emission spectrum is continuous

Atomic absorption spectrum is continuous

Distance between the lines increases

Saturated solution of a solid is prepared at a constant temperature. 100 cm³of this saturated solution is evaporated in a china dish. The mass of the residue is called

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Azetropic mixture

Solubility

Solubility product

Equilibrium constant

Which is not a component of environment

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Biosphere

Lithospahre

Hydrosphere

None of these

Esters have peculiar smell, which of the following is used as an essence of orange

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Isoamyl acetate

Iosamyl valerate

Octyl acetate

Methyl butyrate

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