Question # 1

A large hole in the ozone layer over antarctica region was discovered in:

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1960s

1970s

1980s

1990s

Vapour pressure of a liquid is more if

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the intermolecular forces between the molecules of the liquid are strong

the intermolecular forces between the molecules of the liquid are weak

more liquid is present in a container

liquid has more surface area to evaporate

Which of the following is a pseudo solid?

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CaF₂

glass

NaCl

all these

The average kinetic energy of an ideal gas per molecule is SI units at 25°C will be

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6.17 x 10^-21 KJ

6.17 x 10^-21 J

6.17 x 10^-20 J

7.16 x 10^-20 J

Stronger the oxidizing agent, higher is

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Redox potential

Standard reduction potential

Reduction potential

_{Oxidation potemial}

Under which condition CO has the maximum molar volume.

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high T and P

Low T and High p

high T and low pressure

Low T and low P

Caseinogen is

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Simple protein

Derived protein

Phosphoprotein

Rich in sulfur containing amino acids

Which noble gas is used in mixture used for breathing by divers?

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Ge

Ar

Kr

He

A molecule of polysaccharide on hydrolysis produces _________ molecules of monosacharides:

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many

Few

2-10

100

Which of the following is a steroid?

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vitamin A

vitamin B

vitamin C

vitamin D

Cellulose is the polymer of

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α-D-glucose

β-D-glucose

Fructose

None

With increases in temperature of 10 K of the reacting gases the rate of reaction is doubled because

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Increase in number of collisions

Number of molecules having energy more than Ea is doubled

Increase in order of reaction

Increase in surface area

The number of paper industries in Pakistan are

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30

25

35

20

Hemoglobin is 68000 times heavier than:

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Oxygen atom

Nitrogen atom

Carbon atom

Hydrogen atom

Born-Haber cycle is an application of

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First of thermodynamics

Second law of thermodynamics

First law of thermodynamics

Hess's law

Coal is used to bake bricks in lime kiln:

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40%

60%

80%

None of these

Stainless steel contains Cr upto

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12%

18%

10%

5%

f-Block elements are also called

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Non typical transition elements

Outer transition elements

Normal transition elements

Inner transition elements

Iodoform test is given by:

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Formaldehyde and Higher ketones

Formaldehyde

Acetaldehyde and methyl ketones

Acetaldehyde

H-bonding is not present in

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Glycerine

Water

Hydrogen sulphide

Hydrogen fluride

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Diastase

Lipase

Inverters

Zymase

Benzene reacts with chlorine to form benzene hexachloride in presence of

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Nickel

AlCl₃

Bright sunlight

Zinc

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