Question # 1

Amino acids are bifunctional organic compounds what are the two function groups

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Carboxylic acid and alcohol

Acohol and aldehyde

Carboxylic acids and ketone

Amino group and carboxylic acid

The main source of natural fibre is

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animal fibres

vegetables fibres

mineral fibres

all of the above

Which of the following statements about amorphous solids is incorrect?

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They melt over a range of temperature

They are anisotropic

There is no orderly arrangement of particles

They are rigid and icompressible

Based on the physico-chemical properties, proteins may be classified into the following types

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Simple proteins

Compound proteins

Derived proteins

All of the above

Fungicides re the pesticides which:

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kill plants

kill herbs

kill insects

control the growth of fungus

The number paper industries in Pakistan are:

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30

25

35

20

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

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Urease

Maltase

Zymase

Lypase

SO₂produced by volcanoes is about

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75%

67%

69%

70%

Amount of product formed increases with time, this statement is true for reactions-------with kinetics

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1s order

3rd order

zero order

Any order

Which of the following is an example of diffusion?

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Spreading of smell of flowers in garden

Steam condensing on a cold window

Bubbles rising in a beaker of boiling water

All of above

What is the formula of silica?

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Si2O3

SiO2

Si3O4

SiO-

Formic acid is given names from Latin word a "formic" which means:

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Red out

Vinegar

butter

Milk

Which of the following is commonly called polyamide

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Nylon

Rayon

Terylene

Oridon

Which is not a method for solid waste management

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Landfill

Incinerating

Recycling

None of these

The boiling point of an a zeotropic mixture of water and ethye alcohol is less than that of water and alcohol. The mixture shows

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That solution is highly saturated

No deviation from Raoult's law

Positive deviation from Raoult's law

Negative deviation from Raoult's law

What is the nature of SO₂

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Basic

Strongly acidic

Weakly acidic

Amphoteric

Which of the following pairs are chemically dissimilar?

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Na and K

Ba and Sr

Zr and Hf

Ca and Zn

The next homologue of C₁₀H₂₂will be

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C₉H₂₀

C₁₂H₂₆

C₁₁H₂₄

C₁₃H₂₈

96500 C electricity is passed through CuSO₄. The amount of copper precipitated is

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0.25 mole

0.5 mole

1.0 mole

2.00 mole

The avtive mass of 64 g of HI in a two litre flask would be

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2

1

5

0.25

The oxyacids of phosphorus in which phosphorus has the lowest oxidiation state is

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Hypophosphorus acid

Orthophosphorus acid

Pyrophosphorus acid

Metaphosphorus acid

A reaction in which heat is given out is

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An endothermic reaction

An exothermic reaction

A thermochemical reaction

An energetic reaction

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