Question # 1

Non-formation of menisus by Hg in presence of O₃is due to the formation of

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Mercuric oxide

Mercurous oxide

Mercuric chloride

Mercurous chloride

Which of the following compounds does not react with NaHSO₃?

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C₆H₅CHO

Acetophenone

Acetone

Acetaldehyde

The ionic product of H⁺ions and OH^-in water is called ionization constant of water Kw. The value of Kw at 25°C is

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0.11 x 10^-14

0.30 x 10^-14

1.0 x 10^-14

3 x 10^-14

Aldehydes and ketones are carbonyl compounds. Which of them react both with NaBH₄and with Tollen's reagent

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Both aldehydes and ketones

Aldehydes only

Ketones only

Neither aldehydes nor ketones

Source of organic compounds primarily is:

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Plants

Animals

Minerals

A & B

Benzene hexachloride is used as

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Dye

Antimaterial drug

Antibiotic

Insecticide

When carbon dioxide is passed through the R - Mg - X is produced

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Any carboxylic acid

Propanoic acid

Propanedioic acid

None of these

Similarity in properties of different organic compounds give rise to the under standing of ______

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Polymerization

Non-polar nature

Homologous series

Isomerism

In a lime kiln, to get higher yield of CO₂, the measure that can be taken is

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To main high temperature

To pump out CO₂

To remove Cao

To add more CaCO₃

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Moles^-2dm⁺⁶

No units

Mole dm^-3

Mole^-1dm^-3

The method used only for the production of symmetrical alkanes

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Kolb's method

Clemmenen

Cannizzaro

Wolf kishner

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

In physical and chemical properties, transition elements show

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Similarities

Dissimilarities

Both of these

Somestimes similarities, sometimes dissimilarities

Vinyl acetylene combines with HCl to form:

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Polyacetylene

Benzene

Chloroprene

Divinyl acetylene

Amides on treatment with Br₂and KOH are converted into amines, the reaction is known as

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Hoffmann's bromamide reaction

Hoffmann's methylation

Gabriel phthalimide reaction

H.V.Z reaction

E₁mechanism is generally shown by

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1° - RX

2° - RX

3° - RX

None of these

XeF₄has shape of

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Sphere

Trigonal bipyramidal

Tetrahedral

Square planar

Elimination bimolecular reactions usually obey

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First order kinetics

Second order kinetics

Third order kinetics

Zero order kinetics

In electrolysis of NaCl when Pt electrode is taken then H₂is liberated at cathode while with Hg cathode it forms sodium amalgam

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Hg is more inert than Pt

More voltage is required to deduce H⁺at Hg than Pt

Na is dissolved in Hg while it does not dissolve in Pt

Conc. of H⁺ions is larger when Pt electrode is taken

Which one of the following is a water soluble vitamin

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D

K

A

Ascorbic acid (Vic C)

Which behaves as insulator for animals body?

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Carbohydrates

Proteins

Fats

Skin

Alkyl halides are reactive :

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High

Medium

Less

Least

Which reaction produces a free radical

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SN reaction

Homelytic fission reaction

Heterolytic fission reaction

Addition reaction

It is common observation that rates of chemical reactions differ :

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Greatly.

A little bit.

Moderately.

CnH_2nis the general formula of

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Alkanes

alkynes

None of above

Ozone hole refers to

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Hole in ozone layers

Reduction in thickness of ozone layer in stratosphere

Reduction of thickness of ozone in troposphere

Increase concentration of ozone

Which of the following reactions occur at moderate rate :

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Rusting of iron

Chemical weathering of stone work of buildings by acidic gases in atmosphere.

Hydrolysis of an ester

Fermentation of sugars

Monosaccharides belong to the group

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Lipids

Fats

Proteins

Carbohydrates

The widely used nitrogen fertilizer that contains about 46% nitrogen is

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Ammonia

Ammonium nitrate

Ammonium sulphate

Urea

Standard reduction of Zn = -0.76 V and that of Ni is -0.25 V. On coupling them by a salt bridge which of these will act as anode

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Salt bridge will act as anode

Zn will act as anode

Ni will act as anode

None of these

Which is used for the reduction of aldehydes and ketones

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NaBH₄

Pt/Pd

Ni

All of these

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