Question # 1

What is the effect of polluted air on environment

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Ozone

Acid rain

Global warming

Smog

According to Lowery Bronsted concept, which of the following is considered as an acid?

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BF3

OH-

H3O+

Cl-

Ph of unpolluted rain water is

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07

Less than 6

5.6

Less than 5

H₂effuses through a porous pot at a rate of 500 cm³per minute at 0°C.The rate of diffusion of O₂through the same vessel at 0°C per minute is

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500 cm³

250 cm³

1 dm³

125 cm³

Which of the following substance has maximum critical temperature

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H₂O

N₂

SO₂

Ne

Thrombin is locally used to stop

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Heart disease

Bleeding

Blood

None of these

In crystal structure of sodium chloride,the arrangement of CI^- ions is

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Fcc

Both fcc and bcc

Bcc

None of these

Sulphate aerosols cause severe respiratory problems particularly among

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Infants

Women

Young people

Old people

Which one of the following is a water soluble vitamin?

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niacin

rioflavin

trypsin

ascorobic acid

Which isomer of C4H9Br will produce 2-methyl propane-2-ol on treatment with aqueous KOH

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n-butyI bromide

Sec-butyI bromide

Isobutyl halide

Tertiary butyl chloride

Which compound is not formed as a result of reaction between acetic acid & HI & red phosphorous

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Ethanol

Water

lodine

Ethane

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy

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10,000

20,000

100,000

50,000

The solution left after the formation of crystals is called :

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Residue.

Filtrate.

Mother liquor.

None of these.

Objects of the size of an atom can be observed in

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An electron microscope

An x-ray spectrum

Atomic absorption spectrum

A visible spectrum

The substance which is present in large quantity is called a :

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Solute

Solvent

solutiion

None of Above

First atomic theory was put forward by an English school teacher:

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Maxewell

Newton

Sanger

John Dalton

S-block elements consist of

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Alkali metals

Alkaline earth metals

Alkali and alkaline earth metals

None of these

The process in which solvent particles surround solute particles is called

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Hydrolysis

Hydration

Solvation

Dissolution

A solution of two component is called

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Binary solution

Dilute solution

Original solution

Standard solution

Proteins and amino acid can be separated by:

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Filtration

^Sublimation

Chromatography

Suction

Reduction or oxidation potential of standard hydrogen electrode is :

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0.0 Volt

0.8Volt

1.0Volt

1.8Volt

Acetic acid is miscible in:

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Water

Alcohol

Either

All of these

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