Question # 1

Pressure remain constant at which temperature the volume of gas becomes twice of what it is at 0°C

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546 °C

546K

200°C

273K

Plaster of Paris is obtained from

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marble

bauxite

gypsum

limestone

Which of the following is a macronutrient?

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Boron

Iron

Copper

Carbon

Denaturation of protein means the structure of protein is disrupted indicate which factor does not denature protein

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oxidizing agent

heat protein

keeping pH 7.35

pH changes

Glycogen on hydrolysis give

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Glucose

Lactose

Fructose

None

Type of polymer formed by teh polymerization of single type of monomer is:

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Homopolymer

Copolymer

terpolymer

All of these

Formic acid is obtained from red out by:

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Distillation

Crystallization

Filtration

Sublimation

Which alkaline earth metal makes peroxide?

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Ba

Be

Mg

Ca

Substituted phenyl group are called

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Arene groups

Alkyl groups

Aryl groups

Acyl groups

The process of effusion is best understood by law

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Grahams

Boyle s

Charles s

Avogadro s

Which of the following is pure substance

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Distilled water

, Sea water

, NaCl (aq)

Brass

K_bvalue of NH₄OH is 1.81 x 10^-5and its conjugate acid has K_a= 5.7 x 10^-10pKb of the base is 4.74, pKa of its conjugate acid is

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-4.74

4.74

10

9.26

Which property is not present in Al?

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Reacts with acid

Reacts with bases

Changes litmus paper

Changes methyle orange colour

The bibre which is composed of at least 85% by weight of acrylonitrile is known as

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Royan fibre

Azlon fibre

Saran binre

Acrylic fibre

Which one of the following has highest density

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Zn

Os

Ni

Cu

Which is the formula of tetra-ammine chloro-nitro platinum (IV) sulphate

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[Pt(NH₃)₄(NO₂)] SO₄

[Pt NO₂CI(NH₃)₄] SO₄

[Pt CI(NO₂) (NH₃)₄] SO₄

[Pt (NH₃)₄(NO₂) CI] SO₄

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

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Fe

Mn

Cu

Mo

Which of the following is not an ortho-para directing group

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What is not true about DNA

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It preserve genetic information

To relicates

Synthesized protein

It has a linear structure

Fe⁺³and Mn²⁺are strong paramagnetic because the number of unpaired electrons in each is

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4

5

6

7

Caroxyl group has functional in it.

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one

two

three

four

Transition elements are called so because:

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Form interstital sompounds

have high m.p

In between 's' and' 'p' block elements

All of these

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