Question # 1

Which isomer of C4H9Br will produce 2-methyl propane-2-ol on treatment with aqueous KOH

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n-butyI bromide

Sec-butyI bromide

Isobutyl halide

Tertiary butyl chloride

Amino acid produce α-hydroxy carboxylic acid when treated with

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KNO₃/HBr

Zn/HCI

NaNO₂/HCI

Pd/BaSO₄

Ecosystem is a smaller unity of

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Nydosphere

Biosphere

Lithosphere

Attmosphere

BOD is the oxygen demand with in day(s):

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Four

Two

Three

Five

Which of these has at least one d electron

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Sc+3

Mn+7

Ti+4

Cr+3

In which of these processes are small organic molecules made into macro-molecules?

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The cracking of petroleum fractions

The fractional distillation of crude oil

The polymerization of ethane

The hydrolysis of proteins

In which of these processes are small organic molecules changed into macromolecules?

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the fractional distillation of crude oil

the cracking of petroleum fractions

the hydrolysis of proteins

the polymerization

Styrene has empirical formula CH, and there is 92.2%C and 7.75% hydrogen. If molar mass is 104g mol¯, what will be integral multiple (n) to get molecular formula:

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2

4

6

8

Ozone in most of the tropical regions acts as a pollutant and cause

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damages to eyes

aggravates asthma

chest discomfort

all of these

Nihydrin reacts with amino acid to give product of

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Bluish color

Violet color

Bluish violet color

No color

A teacher told his student that air is a mixture. This is due to the reason that suddenly a student raised his hand and said:

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it has different properties from its constituents

oxygen can be removed from it

it is colourless

its composition is different at different altitudes.

Metallic conduction is due to the

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Movement of electrons

Movement of ions

Both a and b

None of these

When CO₂is made to react with ethyl megnesium iodine, followed by hydrolysis, the product formed is:

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Propane

Propanoic acid

Propanal

Propanol

The empirical formula of a liquid compound is known to be C₂H₄O. What other information is needed to work out its molecular formula?

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The percentage composition of the compound

The relative molecular mass of the compound

The density of the compound

The volume occupied by one mole of the compound

Alkyl halides in which a halogen atom is bonded to that carbon atom which directly bonded with one hydrogen atom is called

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Primary alkyl halides

Secondary alkyl halides

Tertiary alkyl halides

Quaternary alkyl halides

Aromatic hydrocarbons are the derivatives of

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Normal series of paraffins

Alkene

Benzene

Cyclohexane

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Increase in concentration of 1

Decrease in concentration of I₂

Increase in temperature

Increase in total pressure

The sp²hybird orbitals are oriented in space at one angle

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180°

109.5°

100°

120°

The empirical formula of benzene is determined by

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IR spectra

U.V

Elemental analysis

NMR spectra

Aromatic aldehydes undergo disproportionation in presence of sodium or potassium hydroxide to give corresponding alcohol and acid. The reaction is known as

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Wurtz reaction

Cannizzaro reaction

Friedel Craft reaction

Claisen reaction

Which of the following compounds contains the highest percentage by mass of nitrogen?

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Ammonia, NH₃

Ammonium carbamate, NH₂CO₂NH₄

Ammonium carbonate, (NH₄)₂CO₃

Hydrazine, N₂H₄

Thre rate of S_N2 reaction depends upon the

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Concentration of alkyl halides

Concentration of nucleophile

Concentration of alkyl halides and nucleophile

None of the above

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