Question # 1

Which pair of molecules have debye force

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Ne and Ne

Argon and water

Na⁺ion and water

Water and water

Industrial effluents have toxic synthetic organic compounds as well as heavy metals like

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Pb

Cr

Hg

All of these

Which one of the following is a powerful electrophile used to attack on the electrons of benzene ring?

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FeCl2

Cl+

FeCl-4

Cl2

The pressure exerted by the vapours in equilibrium with its pure liquid at given temperature is called the

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equilibrium pressure

atmospheric pressure

vapour pressure

external pressure

A sing chlorine free radical can destroy how many ozone molecules:

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10

100

1000

10000

The pressure exerted by gas molecules is due to their

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collisions

densities

masses

kinetic energy

Per hydro cyclopentanone phenantherene is the basic structural of all the.

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Waxes

vitamins

proteins

steroids

Which of the following carbohydrates is used in silvering of mirrors

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Sucrose

Cellulose

Fructose

Glucose

Potable water is considered to be

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Safe for human consumption

The ground water

The surface water

Now safe for human consumption

When light is exposed to a typical transition element, then electrons jumps from low orbitals to higher orbitals in

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f-orbitals

s-orbitals

p-orbitals

d-orbitals

In a closed vessel a gas is heated from 300 K to 600K The kinetic energy becomes remains

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Double

Same

Half

Four times

Partial pressure of a solution component is directly proportional to its mole fraction. This statement is known as

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Henry's law

Raoult's law

Distribution law

Ostwald's dilution law

Solutions with same osmotic pressures are called

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Hypertonic

Hypotonic

Isotonic

Normal

The oxidation number of each element of group ll-A is

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0

+1

+2

-1

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Condensation

Electrophilic substitution

Free radical substitution

Nucleophilic substitution

Which of the following element is responsible for oxidation of water to O₂in biological process?

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Fe

Mn

Cu

Mo

The colour of transition metal complexes is due to

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d-d transitions of electrons

Para magnetic nature of transition elements

Ionization

Loss of s-electrons

The solubility product of Ca(OH)₂is 6.5 x 10^-6. The concentration of OH^-ions is

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1.175 x 10^-2

2.35 x 10^-2

3.25 x 10^-3

3.25 x 10^-4

In the manufacture of iron from haematitie,limestone is added to act as

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Flux

A reducing agent

Slag

An oxidizing agent

In which of these processes are smell organic molecules made into macromolecules?

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The cracking of petroleum fractions

The fractional distillation of crude oil

The polymerization of ethane

The hydrolysis of proteins

The reference electrode is made by using

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ZnCl₂

CuSO₄

HgCl₂

Hg₂Cl₂

Pauli's principle is applicable to

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Degenerate orbits

Two electrons in the same orbital

One electron

None

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