Question # 1

Lysine is ______ amino acid

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Acidic

Basic

Natural

None of these

Which of the following elements should be the least metallic in character

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Rb

ln

Te

l

The osmotic pressure of a dilute solution is directly proportional to the

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Diffusion rate of the solute

Ionic concentration

Elevation in boiling point

Flow of solvent from a concentrated to a dilute solution

Which of the followingα-Amino acids has basic R-group

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Proline

Glutamic acid

Histidine

Valine

Which element forms an iron with charge 3+?

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Berylium

Aluminium

Carbon

Silicon

Objects of the size of an atom can be observed in

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An electron microscope

An x-ray spectrum

Atomic absorption spectrum

A visible spectrum

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0.073

0.147

0.05

0.026

The ph of 10-3 mole dm-3 of an aqueous solution of H₂SO₄ is :

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3.0

2.7

2.0

1.5

In Antarctica ozone depletion is due to the formation of following compound

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Acrolein

Peroxy acetyl nitrate

SO₂and SO₃

Chlorine nitrate

Alkenes combine readily with electrophillic reagents such as halogens giving

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Haloalkanes

Gem-dihalides

Vicinal dihalides

Vinyl halides

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A primary alcohol

A secondary alcohol

An eher

A phenol

The coinage metals are

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Ni, Pd, Pt

Cu, Ag, Au

Zn, Al, Pb

Fe, Si, Sn

Sulphonation of benzoic acid produces mainly

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o-Sulphobenzoic acid

m-sulohobenzoic acid

p-Sulphobenzoic acid

o-and p-Sulphobenzoic acid

Dilatometric method is used for rate determination when

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Reactions involving change of optical

Reactions involving change of optical activity

Reactions involving small volume change

None of above

[Ti(H₂O)₆]⁺³ion absorbs colour:

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Blue

Yellow

Green

Red

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The value of K_pfalls with a rise in temperature

The value of K_pfalls with increasing pressure

Adding V₂O₅catalyst increase the equilibrium yield of sulphur trioxide equilibrium yield of sulphur trioxide

The value of K_pis equal to K_c

Basicity of orthoposphoric acid is

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2

3

4

5

Meta directing group decreased the ----------- of benzene ring

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Physical activity

Chemical reactivity

Density

None

The reaction of alcohol with SOCI₂in the presence of pyridine as catalyst gives

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Acids

Acid chloride

Alkyl halide

Benzene

If ketone reacts with Grignard's reagent, it also produces alcohol, But it will be a

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primary alcohol

Secondary alcohol

Tertiary alcohol

Aromatic alcohol

A double bond consists of:

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Two sigma bonds

One sigma and one pi bonds

One sigma and two pi bonds

Two pi bonds

Sodium hexametaphophate is known as

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Calgon

Permutite

Natalite

Nitrolim

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4-methyl pentene

2-methyle-1-butene

2-methyl propane

None of the above

Oxidation number of oxygen in OF₂is

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+1

-1

+2

-2

A white precipitate ofsilver chlorideimmediately formed on additionof :

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Silver nitrate solution to sodium chloride solution.

Silver chloride solution to sodium nitrate solution.

Silver nitrate solution to potassium chloride solution

Silver nitrate solution to hydrogen chloride solution.

In the atmosphere, CO₂is about

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0.01%

0.03%

0.05%

0.09%

Which of the following is weakly acidic in nature

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Alcohol

Phenol

Aidehyde

Amide

Carboxyl compounds have functional group:

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R-C-X

R-CH=O

RCOR

All

Clemensen's reduction of ketones is carried out in

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H₂with Pd catalyst

Glycol with KOH

LiAIH₄in water

Zn-Hg with conc. HCl

Wohler succeeded in obtaining, urea from

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Cyanogen

Ammonium cyanate

Ammonium hydroxide

None of these

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Shift reaction toward forward direction

Shift reaction backward

Lower the value of K_c

No change in reaction

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