Question # 1

Carboxylic acids having carboxyl group one is called:

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Mono carboxylic acid

Di-carboboxylic acid

Tri carboxilic acid

Tetra carboxylic acid

Essentialα-amino acids are those which are necessary in the diet

Which one is an essentialα-amino acids

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Alanine

Aspartic acid

Glycine

Tryptophan

Three sp²hybrid are co-planar at an angle of

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104.5°

109.5°

107°

120°

Electron affinity of sulphur is

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More than O and Se

More than O but less than Se

Less than O but more than Se

Equal to O and Se

The weight of pure NaOH required to prepare 250 cm³of 0.1 N solution is

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4 g

1 g

2 g

5 g

K_spvalue for PbSO₄= 1.8 x 10^-8mole²dm^-6. The maximum concentration of Pb⁺⁺ions is

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1.34 x 10^-4mole dm^-3

1.8 x 10^-4

3.6 x 10^-16mole dm^-3

1.0 x 10^-8mole dm^-3

When two hydrogen atoms approach each other.

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Forces of attraction operate.

Forces of repulsion operate.

Forces of attraction and repulsion operate simultaneously.

Nothing happens.

Matter is defined as any thing which occupies space and:

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Molecules

Mass

Compound

Molecules

Which of the following is a member of -block

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Zn

Al

B

Br

Consider the ground state of Cr atom (Z=24). The numbers of electrons with the azimuthal quantum numbers l = 1 and l = 2 are respectively

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12 and 4

16 and 5

16 and 4

12 and 5

The hydrocarbon which is used as an illuminating agent

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Methane

Methene

Methyne

B & C

The normal amount of overhead ozone is about

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250 Du

300 DU

350 DU

400 DU

The distillation of coal at high temperature and in absence of air is called

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Vacuum distillation

Normal distillation

Fractional distillation

Destructive distillation

Which of the following sets of atomic numbers belong to that of the alkali metals?

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1,12,30,4,62

37,19,3,55

9,17,35,53

12,20,56,88

Kolb's method is not useful for the production of

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Methane

Ethane

Propane

Butane

The reaction-method that does not give an alkane is

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Catalytic hydrogenation of alkanes

Wurtz reaction

Hydrolysis of alkyl magnesium bromide

Dehydrohalogenation of an alkyl halide

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

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

The boiling points of alcohols are higher than the corresponding alkanes, This is because

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Of hydrogen bonding existing between molecules of alcohols

Alkanes are dipolar compounds

Alcohols are sweet in taste

Alcohols are soluble in water

The specific conductance of a 0.1 N KCl solution at 23°C is 0.012 ohm^-1cm^-1. The resistance of cell containing the solution at the same temperature was found to be 55 ohm. The cell constant will be

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0.142 cm^-1

0.66 cm^-1

0.916 cm^-1

1.12 cm^-1

Among the elements given below, the one with highest electropositivity is

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Cu

Cs

Cr

Ba

A large value of K_cmeans that at equilibrium :

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Less reactant and more products.

Reactants and product in same amounts.

More reactants and less products.

None of above.

Which of the following derivative cannot be prepared directly from acetic acid?

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Acetamide

Acetyl chloride

Ethyl acetate

Acetic acid

The alkali metals form

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Ionic bond

Covalent bond

Co-ordinate bond

H-bond

Baking powder has which one of the following formula

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Na₂CO₃

Na₂SO₄

NaHCO₃

K₂CO₃

Wolf-kishner reduction is used for the reduction of

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Nitro compounds

Carboxylic acids

Carbonyl compounds

Olefins

The positive ion is always smaller than the neutral atom while the negative ion is always bigger than the neutral atom. The atomic and ionic radii of Na, F, Na⁺, F^-are in ppm

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Na F Na⁺ F^-

157 72 95 136

Na F Na⁺ F^-

157 95 172 136

Na F Na⁺ F^-

72 95 136 157

Na F Na⁺ F^-

157 136 95 72

The fibre which is made from vinylidine chloride polymer is called

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Rayon fibre

Azlon fibre

Acetate fibre

Saran fibre

The total number of orbitals possible for the quantum number n is

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n

n²

2n

2n²

Naphthalene, iodine and NH_{4 can :}

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Sublime.

Both (a) and (c).

Crystallize.

None of above.

Which is the transition element among the following

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B

Al

Cu

Cs

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