Question # 1

Nitrogen in the atmosphere is:

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78%

21%

0.9%

0.03%

Solids in which atoms, ions or molecules are not regularly arranged are

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crystalline solid

amorphous solids

liquid crystals

low melting points

Dehydrogenase is an erample of

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Transferase

Hydrolase

Lyase

Oxido-reductase

Density of a gas is usually expressed in

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Kg m³

Kg dm³

g dm^-3

g cm^-3

Naphthalene has two fused aromatic ring of carbon atom the molecular formula

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C10H8

C10H14

C10H10

C12H12

The number of atoms or molecules whose concentrations determines the rate of a chemical reaction is called the

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Molecularity of the reaction

specific activity of the reaction

Order of the reaction

rate constant of the reaction

The formation of ester from acetic aciad in presence of acid and ethanol is a

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Nucleophilic substitution reaction

Nucleophilic addition reaction

Electrophilic substituion reaction

Electrophilic addition reaction

Which of the following is not a macromolecule?

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diamond

graphite

iodine

silica

Which of the following gases have lowest density at room temperature

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CO

N₂

Ne

NH₃

Amino acids which contain two amino groups are called

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Acidic amino acids

Basic amino acids

Neutral amino acids

Amphoteric amino acids

Which of the following molecules have a permanent dipole

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CH₄

CHCl₃

CCl₄

CO₂

Acetamide and NaOBr/OH^-produce

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Ethanamine

Methanamide

CH₃CN

NH₃

Without proper suction,filtration is:

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Rapid process

Fague process

Slow process

Useless process

The colour of transition metal complexes is due to:

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d-d transitions of electorns

Paramagnetic nature of transition

Ionization

Loss of s-electrons

The element with atomic number 26 will be found in group

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2

8

6

10

The structure of complex hydrides is

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Tetrahedal

Trigonal

Octahedral

Square planar

Which of the following metals is sometimes found in native state in nature?

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Al

Cu

Fe

Mg

When benzene is burnt in free supply of air, it is completely oxidized to

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CO

CO₂₊H₂O

H₂CO₃

None

If Grignard reagent is allowed to react with another alkyl halide the main product is

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An alkane

Cyclo alkane

Alkyne

An alkene

Which gas is produced by treating CaC₂with water

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Methane

Ethane

Acetylene

HCI

The malt-sugar in the presence of yeast or invertase gives

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Fructose

Glucose

Lignin

Alcohol

Buffers having pH less than 7 are made

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Mixture of weak acid + salt of it with strong base

Mixture of weak acid + salt of it with weak base

Mixture of weak base + salt of it with strong acid

Mixture of weak base + salt of it with weak base

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