Question # 1

Which element of group V-A and VII-A does not use d-orbital?

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Nitrogen

Sulphur

Arsenic

Chlorine

Sea gets polluted bu accidental oil spills and

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Atmospheric pressure

Nitrogen gas

Cargo oil tankers

Aero plane

Which one of following statement about three about three states of matter is incorrect?

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in solids the particles vibrate about fixed positions

energy is released when a gas turns back to a liquid

particles in gases move in a random manner

the closer particles are together, smaller the force of attraction between them

The words smog is a combination of smoke and:

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fog

foke

fork

fizzy

Correct order for the reactivity ofalkyl halide in S, reactions

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R-I>R-F>R-CI

R-F>R-CI>R-I

R-I>R-CI>R-F

R-CI>R-I>R-F

The gas which obey's the gas laws at all conditions of temperature and pressure is called:

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Perfect gas

Super gas

Ideal gas

Real gas

The maximum possible number of hydrogen bonds in which a H₂O molecule can participate is

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1

2

3

4

Which of the following statements is false?

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Avogadro number = 6.02 x 10²¹

The relationship between average velocity (v) and root mean square velocity (u) is v = 0.9213 u

The mean kinetic energy of an ideal gas is independent of the pressure of the gas

The root mean square velocity of the gas can be calculated by the formula (3RT/M)^1/2

One of the following can produce greater number of moles of ethyl chloride on reacting with escess of ethanol

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PCI5

PCI3

HCI/ZnCl2

SOCI2

The factor responsible for lower mercury level in a capillary tube is

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High density

Surface tension

Liquid state

Metallic Colour

Acetic acid is obtained from:

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Red out

Vinegar

Butter

Milk

Which of these polymers is a synthetic polymer?

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Animal fat

Starch

Cellulose

Polyester

The rate of E₁reaction depends upon:

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The concentration of substrate

The concentration of nucleophile

The concentration of substrate as well as nucleophile

None of these

Vinegar is dilute solution of:

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Acitic acid

Formic acid

Butyric acid

Propionic acid

Spontaneous reaction is such in which the system decreases its ______

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Energy

Free energy

Entropy

All

One mole of C₂H₅OH contains the number of H-atoms

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6.02 x 10²³

3.61 x 10²⁴

1.81 x 10²⁴

6.02 x 10²⁴

Gypsum is a common mineral of

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Magnesium

Strontium

Calcium

Barium

The effective activity of a metal catalyst is increased if it is in

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Solid form

Liquid state

Gaseous state

Finely divided form

On adding sodium nitroprusside ketones give

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Red

Wine red

White

Orange

Which one of the following enzymes brings about the hydrolysis of fats

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Urease

Maltase

Zymase

Lypase

The bond order O₂molecule is

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1

2

3

Zero

Which is the derived lipid?

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Common fats

Vitamin-D

Common oils

Spinolipids

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