Question # 1

For every reaction occurring in the body three is at least one type of

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enzyme

vitamin

protein

reactant

Phosphorous is very useful in growth of:

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Leave

Root

Stem

Seed

Dehydrohalogenation of alkyl halides happens in the presence of

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Pd

Ni

Zn

KOH/alcohol

2,5-dimethyl-1-hexene has

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Two sp2 hybridized carbons

Six sp2 hybrid carbons

Two double bonds

Four pi electrons

Which of the following is exact relationship between °F and C°

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°F= 5/9[°C-32]

°C = 5/9 [°F]+32

°F = 9/5°C+32

All

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg Toxic.

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It attaches to sulphur of the disulphide link

Hg is a heavy metal

Hg is liquid at room temperature

Hg is non reactive chemically

what is the exact value of angle in BF3

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90

104.51

119.5

120°

Most of the reactions which give stable products are

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Endothermic

Exothermic

Isothermal

Non of these

Coagulation removes suspended particles in ran water:

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60%

70%

80%

90%

Ethyl and methyl groups are equidistant in a chain, the preference is given to?

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Ethyl

methyl

both ethyl and methyl

methyl mostly

The motion imparted to the gas molecules by gravity is

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very small

very large

negligible

appreciable

K_bfor NH₄OH is 1.81 x 10^-5, then K_avalue of its conjugate base is

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1.81 x 10⁺⁵

1.81 x 10^-9

5.5 x 10^-9

5.5 x 10^-10

What element is not essential the growth of plants and is not required in the fertilizers

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Nitrogen

Potassium

Phosphorus

Barium

Hydrogenation of vegetable oils is accelerated by Ni catalyst. The catalytic activity of Bi is increased by a promoter of activator which is

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Na and K

Na and Hg

Hg and Zn

Cu and Te

A carboxylic acid contains:

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A hydroxyl group

A carboxyl group

A hydroxyle & carboxyl group

A carboxyl &aldehyde group

The number of amino acids found in proteins that a human body can synthesize is

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20

10

5

14

Ether show the phenomenon of :

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Position isomerism

Functional group isomerism

Metamerism

Cis-trans isomerism

Hydrolysis of an ester gives a carboxylic acid which on Kolbe's electrolysis yields ethane. the easter is

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Ethyl methonoate

Methyl ethanoate

Propylamine

Ethylamine

Which three elements are needed for the healthy growth of plants?

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N,S,P

N,Ca, P

N,P,K

N,K,C

From the difference between expected bond energies for the normal covalent bond and experimentally determined values Pauling calculated the values of

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Ionization potential of elements

Electron affinity of elements

Electronegativity of elements

Bond length

Schrodinger wave equation describes electron completely because

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It describes a set of four quantum number

It describes the particle nature of electron

It measures wavelength of electron

It describes electron moving in specific orbit

Substances that render enzymes catalytically inactive are called

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Conenzymes

Substrates

Inhibitors

Apoezymes

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