Question # 1

In beta elimination reaction

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carbon number changes

unsaturated compound is formed

hybridization. ofC remains same

pi bonds are decreased

Arginine, lysine and ornithine are

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Obtained by hydrolysis of proteins

Essential amino acids

Basic amino acids

Derived from butyric acid

If V₁= 5 litres, P₁= 2 atm, T₁= T₂= 273°C and V₂= in liter

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5

80

125

10

The eleventh concentration of metal cause clogs of gills in fish:

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Al

He

Pb

Ca

The pH of the rain water in areas where acid rain is the cause of pollution may be

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6.5

5.6

4.5

2.2

Equal volume of all gases at same temperature and pressure contain number of molecules

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different

multiples

equal

in fractions

Which one is correct about conjugate acid-base concept?

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Conjugate base of a very weak acid is relatively very strong

Conjugate base of a very weak acid is relatively very weak

Conjugate base of a very strong acid is relatively very weak

Both A and C

Large molecule formed by combination of smaller units these smaller units are called:

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Polymers

Macromolecule

Micromolecule

a & b

The lattice energy of NaCl is

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787 j/ mole

790 kj/mol

780 kJ/ mol

-787 kI / mole

Which of the following is electrophile for alkylation?

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NO+2

SO3

R+

Both a & b

When calcium formate and calcium acetate are dry heated they form

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НCOOH

C2H5OH

CH3CHO

HCHO

How many alcohol (including both structural isomers and stereoisomers) can have the molecular formula C₄H₁₀O

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3

4

5

6

Atmosphere of big/metropolitan cities is polluted most by

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Automobile exhausts

Pesticide residue

Household waste

Radio-active fall out

The higher molecular weight materials which yield on hydrolysis the amino acids is called:

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Carbohydrates

Lipids

Fatty acids

Proteins

Which is the derived lipid?

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Common fats

Vitamin-D

Common oils

Spinolipids

When acetic acid and ethanol react together an ester is formed which is called

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Ethyl ester

Ethanoic acid

Ethyl acetate

Content of carbon in steel is:

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0.12 to 0.25%

0.25% to 2.5%

3.0 to 3.5%

4.0 to 4.5%

Which of the following statements about acetic, anhydride is not correct

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It is immiscible with water but is hydrolysed to give acetic acid

It is prepared by the action of actyl chloride on the sodium salt of acetic acid

it reacts with ammonia to give acetamide

it is a strong acid

Which of the following brings about the conversion of starch into maltose

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Maltase

Zymase

Diatase

Invertase

The human body can synthesize ______ amino acids

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1

10

20

19

Sintered glass is porous material used for:

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Absorption

Decoration

Filtration

All of above

Which factor is helping to reduce the environmental pollution

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Rapid growth of population

Urbanization

Industrialization

Increase of plantation

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