Question # 1

Deep sea divers take oxygen with:

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A heavy gas

A lighter gas

An inert gas

All of above

All of the following are primary aminoacids except

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Cysteine

Cystine

Alanine

Arginine

Which one of the following statements about glucose and sucrose is incorrect

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Both are soluble in water

Both are naturally occurring

Both are carbohydrates

Both are disacharides

Eleven elements made part of earth mass:

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97.5%

98.5%

99.5%

100%

Lind's ,method for liquefaction of gases is based on the principle of:

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Graham's law of diffusion

Joule Thomson effect

Avogadro's hypothesis

Dalton's law of partial pressure

By increasing pressure two times and decreasing temp. two times the volume of gas

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Volume increases 4 times

Volume decreases 4 times

Volume increases 2 times

Volume decreases 2 times

Elements of group ll-A are called

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f-block elements

s-block elements

p-block elements

d-block elements

The element which shows highest binding energy

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V

T

So

Cr

Which compound gives carbon when heated with conc. H2SO4.

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Starch

Ethyl alcohol

Oxalic acid

Formic acid

If the distance between Na⁺ and CI^- ions in sodium chloride crystal is X pm,the length of the edge of the unit cell is

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4X om

X/4 pm

X/2 pm

2X pm

Which is not present as heteroatom in heteroeyclie compounds?

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Sulphur

Nitrogen

Oxygen

Chlorine

Which of the following solution have zero pH

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1 M HCI

MH₂SO₄

0.1 M HNO₃

1 M CH₃COOH

The rate of reaction determined at a given time is called

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Average rate

Instantaneous rate

Specific rate

Overall rate

Which of the following will be good conductor of electricity

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Pure distilled water

Molten NaCl

Dilute solution of glucose

Chloroform

The oxidation state of an element is zero when

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It forms an oxide

It forms hydride

It is in free state

Only for noble gases

If an electrophile attacks then ______ bond breaks first

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C - H

O - H

C - O

None of these

Which of the following is not an air

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N₂

N₂O

NO

CO

Sulphuric acid reacts with PCl₅to give

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Thionyl chloride

Sulphur monochloride

Sulphuryl chloride

Sulphur tetrachloride

Metal tend to lose electrons, becoming:

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Metals

Positively charged

Negatively charged

(a)And (c)

Prevention of corrosion of iron by Zn coating is called

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Galvanization

Cathodic protection

Electrolysis

Photoelectrolysis

Which of the following is weakly acidic in nature

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Alcohol

Phenol

Aidehyde

Amide

Newspaper can be recycled again and again by how many times?

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2

3

4

5

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