Question # 1

To become a carbohydrate a compound must contain

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2-carbon

3-carbon

4-carbon

5-carbon

Which of the following are thermoplastic materials?

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PVC (poly vinyl chloride)

polystryences

polyethylene

all above

Keeping in view different factors which affect the melting point of a substance.the compound having melting point among the following is:

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LiCl

NaCl

CsCl

RbCl

Which one of the following is a water soluble vitamin?

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niacin

riboflavin

tyrosine

ascorbic acid

Which of the following is not the required condition for the formation of smog

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Sufficient NO

Sunlight

Less movement of air

Winds

Albumin is

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Insoluble in water

Heat coagulable protein

A plant protein

A protein of low biological value

Which of the following reagents reaet in same manner with HCHO, CH3CHO andCH3COCH3

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HCN

Cu2(OH)2/ NaOH

Ammonical AgNO3

Cu(OH)2 only

The Cl- ion present at the corner of the unit cell is NaCl crystal, contributes

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1/8 th

1/4 th

1/2 th

1

The amount of heat required to vaporize one mole of liquid at its boiling point without change in temperature is called

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molar heat of vaporization

molar heat of sublimation

molar heat of fusion

none of these

Choose an addition polymer among the following:

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terylone

nylon 6,6

polystyrene

epoxy resin

There are 20 amino acids found in protein which is not the property of these amino acids

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They are all alpha-amino acids

They are all optically active

They have high decomposition point

They are water soluble

Which of the following is a polar molecules

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Carbon dioxide

Carbon tetrachloride

Methanol

Ethane

Which is used to remove air bubbles form metals?

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B

Be

Mg

Al

Among O, C, F, Cl, Br, the correct order of increasing radii is

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F O C Cl Br

F C O Cl Br

F Cl Br O C

C O F Cl Br

Vegetables oil are:

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Unsaturated fatty acids

Glycerides of saturated fatty acids

Essential oils obtained from plants

None of these

Which of the following alkyl halides is used as a mathylating agent

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CH₂H₅l

CH₃l

C₂H₅Pr

C₂H₅Cl

In the electrolysis of aqueous solution of sodium nitrate, the ions which are reduced at the cathode are

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H₃O⁺

Na⁺

OH^-

NO^3-

On heating acetaldehyde with ammonical silver nitrate solution, we get

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CH₃OH

Silver acetate

HCHO

Silver mirror

Which of the following chlorocompounds is heat easily hydrolysed by hydorxide ion to give the product indicated

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From which of the following tertiary butyl alcohol is obtained by the action of methyl magnesium iodide?

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HCHO

CH₃CHO

CH₃COCH₃

CO₂

Which element has 4 unpaired electrons in 3d-orbital

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Chromium - 24

Manganese - 25

Iron - 26

Cobalt - 27

Lactic acid on oxidation by alkaline potassium permanganate gives

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Tartaric acid

Pyruvic acid

Cinnamic acid

Propionic acid

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