Question # 1

Nihydrin reacts with amino acid to give product of

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Bluish color

Violet color

Bluish violet color

No color

Which one of the following is an aromatic compound?

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Benzene

Thiophene

Furan

All of them

Joule is a unit of energy which is defied as

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Kgm^-2s^-2

Kgm²s^-1

Kgms^-2

Kgm²s^-2

Contaminated soil can be cleaned by various methods. Which method is not used to clean the soil

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diffusion

convection

electrophoresis

chromatography

Amino acid which synthesized many hormones is

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Valine

Phenylalanine

Alanine

Histidine

The structure normally associated with ionic bonding is:

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a giant lattice

a simple molecule

a giant molecule

a regular arrangement of ions surrounded by a sea , or cloud, of electrons

Which fiber contains 85% acrylonitrile by weight:

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Acrylic fiber

Azlon fiber

Saran fiber

Rayon fiber

The layer of gases around the earth are called?

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Atmosphere

Hydrosphere

Lithosphere

All of these

Potassium fertilizers are especially useful for:

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Tobacco

Potato

Coffee

All of these

During thunderstorms, water dissolves

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Dust particles

HCl

Nitric acid

Clouds

Which of the following is a non-typical transition element?

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Cr

Zn

Mn

Fe

strength of an acid can be determined by

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P^ka

P^kp

P^oH

P^kw

Which of the statement is contrary to the first law of thermodynamics

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Energy can neither be created nor destroyed

One form of energy can be transferred into an equivalent amount of other kinds of energy

In an adiabatic process the work done is independent of its path

Continuous production of mechanical work without supplying an equivalent amount of heat is possible

The percentage of carbon in different types of iron products is in the order of

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Cast iron > wrought iron > steel

Wrought iron > steel > cast iron

Cast iron > steel > wrought iron

Cast iron = steel > wrought iron

White phosphorus is

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A mono atomic gas

P₄, a tetrahedral solid

P₈, a crown

A linear diatomic molecule

Acetic acid is also named.

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Methanoic acid

Ethanoic acid

Propanic acid

Butanoic acid

What happens when CCl₄is treated with AgNO₃solution?

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NO₂will be evolved

A white ppt. of AgCl will form

CCl₄will dissolve in AgNO₃solution

Nothing will happen

Alkyl halides are considered to be very reactive compounds towards nucleophiles, because:

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They have an electrophilic carbon

They have an electrophilic carbon and good living gorup

They have an electrophilic carbon and bad living group

They have an nucleophilic carbon and good living gorup

Which is a component of macronutrient?

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Zn

N

Mo

Cl

When ammonia is heated with cupric oxide, a molecule of ammonia will

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Gain 3 electrons

Lose 3 electrons

Gain 2 electrons

Lose 2 electrons

The self linking of carbon atoms is called

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Chelation

Isomerism

Catenation

None of the above

Which of the following is not the reactions of lithium

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