Question # 1

Nucleic acid contain elements like N,H,O,C and

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Ca

S

P

F

How many allotropic forms are present in carbon?

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Two

Four

Three

Five

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

suppose that an ocean of mercury replaced all the air of the air of the earth . How deep would this ocean have to be to exert the same pressure as the air:

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77cm

76cm

79cm

78cm

DDT is a:

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Fungicide

Insecticide

Herbicide

All

Reaction kinetics is important to discover the---under which reaction will proceed most economically:

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rate constant

Conditions

volume

equilibrium point

Which of the following liquids have low vapour pressure at 25°C

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Water

Ethyl alcohol

Acetone

Diethyl ether

A molecule which contains two lone pairs and two bond pairs of electrons in valence shell of central atom, geometrical shape of molecules will be

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Tetrahedral

Trigonal pyramidal

Angular

Linear

Lactic acid is buffered by

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L. Carnosine

Glutathione

Casenogin

Dopa

Glycerin boil at 290°C under normal atmospheric pressure. If the pressure is reduced to 50 mm of Hg, it will boil

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above the given temperature

below the given temperature

at the same temperature

at 25°C

In MgCl2, the oxidation state ofCI is

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Zero

-2

+2

-1

The electrolytic cell used for the production of metallic sodium is known as

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Down's cell

Solvary's cell

Haber's cell

None of these

A limiting reactant is one which according to the stoichiometric equation

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Has excess mass

Has least mass

Has excess number of moles

Has least number of moles

Rate of chemical reaction depends upon :

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The number of total collisions per second.

Number of molecules taking part in a chemical reaction.

Number of fruitful collisions per second

Number of fruitless collisions per second.

The destructive distillation of coal gives three products. What is not the product of destructive distillation of coal

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Coal gas

Carbon dioxide

Coal tar

Coke

The amount of heat evolved or absorbed in a process in the same whether the process takes place in one or several steps is the statement of

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First law of thermodynamics

Hess's law

Coulomb's law

Phase law

Which acid is used in the manufacture of synthetic fibre?

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Formic acid

Oxalic acid

Carbonic acid

Acetic acid

The reaction of sodium with ethanol gives

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CH₃OH

NaH

H₂O

H₂

The process of electrical coating of one metal on another to protect, decorate or to have greater resistance to corrosion is called

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Electroplating

Electrolysis

Conduction

Induction

Which of the following compounds gives trichoromethane on distilling with bleaching power?

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Methanal

Phenol

Ethanol

methanol

1-butene an 2-butene are an example of

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Chian isomerism

Positional isomerism

Metamerism

Functional group isomerism

CH₃CH₂COOH is also named as:

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Propionic acid

Propanoic acid

Acetic Acid

Both (a) and (b)

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