Question # 1

Oxidation of secondary alcohol produces

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Aldehyde

Ketone

Alkyl halide

Ester

Which of the following is soluble in water?

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СН3ОН

CCL4

CHCI3

CS2

When a nitrogeneous base combine with a sugar it is called

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Ribose

Nucleotides

Nucleoside

None

Troposphere extends upto km:

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0-15 km

10-15 km

15-40 km

Aromatic carboxylic acids have corboxyl group attached to group:

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Alkyl group

Aryl group

Phenyl group

Benzyl group

alum or aluminium sulphate used as coagulant in alkaline medium change into precipitate of radicals of alumimium.

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sulphates

oxides

hydroxides

chlorides

Which is the following is true about galvanic cell:

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Reduction occurs at cathode

Reduction occurs at anode

Anode is negatively charged

Chathode is positively charged

Which ion has maximum number of unpaired electrons in 3d subshell and shows maximum paramagnetic behavior?

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Cr+3

Ni+2

Co+2

Fe+3

Which of the following is not an electrophilic substitutional reaction of benzene?

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Free radical chlorination of benzene

Friedel Craft alkylation

Sulphonation

Nitration

Coagulation in the purification of water is carried out by

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Alum

NiSO₄

BaSO₄

CuSO₄

A mixture of 1-chloropropane and 2-chloro-propane when treated with alcoholic KOH, gives

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Prop-2-ene

Isopropy lene

Propene

A mixture of prop-l-ene

Which of the following reacts with chloroform and base to form phenyl isocynaide?

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Nitrobenzene

Phenol

Chlorobenzene

Aniline

Organic compounds generally react at ______ rates

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Slow

Fast

Moderate

None of them

An electrophile may be

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Positive

Negative

Neutral

Both c and a

The order of distance between the various Bohr orbits is

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r₂- r₁> r₃- r₂> r₄- r₃> ......

r₁> r₂> r₂- r₃> r₄-r₃> .....

r₂-r₁= r₃- r₂= r₄- r₃> .....

r₂- r₁> r₃- r₂< r₄- r₃< ....

The bond length b/w atoms of hydrogen in the hydrogen molecules is:

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7.54 nm.

0.0754 nm.

0.754 nm.

0.00754 nm.

A solutiion of 0.5 mole camphor in 100 grmas chloroform (K_b= 0.322) has rise in boiling point than that of chloroform by

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0.81°C

1.61°C

1.81°C

0.61°C

The treatment of benzene with isobutene in the presence of sulphuric acid give

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isobutyl benzene

tert-Butyl benzene

n- Butyl benzene

no reaction

Which of the following will have the highest boiling point?

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Methanal

Ethanal

Propanal

2-Hexanone

Compounds X, Y and Z, all react with PCI₅to release hydrogen chloride, but only one of them reacts eith 2,4-dinitrophenylhydrazine reagent. Which one of the following combinations could be X, Y and Z

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The formula of ketone is

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None of these

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.

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