Question # 1

Ecosystem is a smaller unit of

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Hydrosphere

Lithosphere

Biosphere

Atmosphere

Which of the following metal oxides is antiferromanetic in nature?

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MnO₂

TiO₂

NO₂

CrO₂

For the reaction H2(g) +I2 (g) <---------> 2Hl(g). The equilibrium constant changes with

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Total pressure

Catalyst

Concentration of H2 and I2

Temperature

Which fiber contains 85% acrylonitrile by weight:

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Acrylic fiber

Azlon fiber

Saran fiber

Rayon fiber

The movement of gas molecules from a region of high pressure to vacuum is called:

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Evaporation

Effusion

Conduction

Diffusion

According to kinetic theory of gases kinetic energy depends on

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Temperature

Collision

Pressure

Atomic number

The product of pressure and volume remains constant when temperature and quantity of gas is:

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Zero

Variable

Kept constant

None of above

The attractive forces which exist between ionic compounds and water molecules are

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dipole-dipole forces

ion diopole forces

istantaneous dipole-induced dipole forces

dipole-induced dipole forces

Which of the following decides the reactivity of alkyl halides?

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C-C bond strength

C-H bond strength

C-X bond strength

Electronegativity difference

The process of coagulation can remove suspended solids in raw water about

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50%

60%

Less than 40%

More than 80%

Sponification is the hydrolysis of fast or fats or4 oils with an/a:

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acid

alkali

enzyme

metallic ion

Which gasses are produced from landfills

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NH₃

H₂S

N₂

All of these

Enzymes, in the living systems

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Provide energy

Provide immunity

Transport oxygen

Catalyze biochemical processes

Which shows maximum catenation property?

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S

Se

Te

O

The volume occupied by 1.4 g of N₂at S.T.P is

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2.24 dm³

22.4 dm³

1.12 dm³

112 cm³

α-Amino acids are found in protein. Which of the following is anα-amino acid

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The order of reactivity of halogen acids for reaction with C₂H₅OH is

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HCl > HBr > HI

HI > HBr > HCl

HBr > HI > HCl

HBr > HCl > HI

Coal is obtained from dead remains of

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Plants

Animals

Both a and b

None

In the electronic configuration of Cr one electron from 4s sub-shell is transfered to 3d sub-shell because

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The 3rd orbital is of lower energy than 4s

The 4s orbital is of equal energy to 3d orbital

The half filled d-subshell is more stable than incomplete d-sub shell

6 unpaired electrons make Cr more paramagnetic

If an electrophile attacks then ______ bond breaks first

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C - H

O - H

C - O

None of these

The fibre which is obtained from naturally occurring proteins is called

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Saran

Azlon

Rayon

Nylon

The addition of unsymmetrical reagent to an unsymmetrical alkene is in accordance with

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Hund's rule

Markownikov's rule

Pauli's Exclusion principle

Auf ban principle

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