Question # 1

To distinguish aldehyde from ketone which solution is used

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Alkaline solution

Fehling's solution

A solution containing K2Cr2O7

A solution containing acid only

According to Boyle's law at constant temperature, the product of pressure and volume of a given mass of gas is:

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a constant

fraction

whole number

a multiple

Succinic thiokinase is an enzyme of the type

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mutase

peroxidase

ligase

lyase

Which gas diffuses more rapidly?

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O₂

SO₃

NH₃

H₂

Example of essential aromatic amino acids

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Theronine

Alanine

Phenyl alanine

Glycine

Petroleum or crude oil is a complex mixture of compounds mainly:

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benzene

minerals

hydrocarbons

phenols

An acid that exists as a cyclic dimer in benzene and shows a molar mass of 120g/mol is

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СН3СOOH

HCOOH

CI2CHCOOH

Сl3CCOOH

chemist was able to measure the value of lattice energy of KCI to be 690 kj/mol.

From this experiment , he concluded that:

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lattice energy of KBr is 665 kj/mol and that of Ki is 630 kj/mol

lattice energy of KBr is 765 kj/mol and that of Kl 730 kj/mol

lattice energy of KBr is 730 kj/mol and that of Ki 765 kj/mol

lattice energy of KBr is 630 kj/mol and that of kL 665 KJ/mol

Which of the following shows group IIIB

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Zn, Cd. Hg

Cu. Ag. Au

Sc. Y. La

Ni. Pd. Pt

Liquid hydrocarbon is

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methane

propane

ethane

hexane

Macromolecules or polymers are large molecules built up from small molecules called monomers. This hypothesis put forward by

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schrodixger

standinger

Lewsi

newton

The rate of forward reaction is two times that of the reverse reaction at a given temperature and identical concentration, K equilibrium is

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0.5

1.5

2.5

2.0

At certain temperature, 50% of HI is dissociated into H₂and I₂the equilibrium constant is

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1.0

3.0

0.5

0.25

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With H₂/Ni CH₃(CH₂)₅CH₂OH

With H₂/Ni CH₃(CH₂)₅CH₃

With NaBH₄ CH₃(CH₂)₅CH₂OH

With NaBH₄ CH₃(CH₂)₅CHO

The percentage of which element in the organic compound is determined by the difference method

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Carbon

Hydrogen

Nitrogen

Oxygen

The order of reactivity for a given halogen in Grignard's reagent is:

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CH₃X > C₂H₅X > C₃H₄X > C₄H₄X

C₂H₅X > C₃H₇X > C₄H₅X > CH₄X

C₃H₇X > C₄H₇X > CH₃X > C₂H₅X

C₄H₄X > C₃H₇X > C₂H₅X > CH₄X

The number of moles of CO2which contain 8.0 g of oxygen

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0.25

0.50

1.0

1.50

Which of the following is an isomer of ethanol

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CH₃OCH₃

C₂H₅OC₂H₅

CH₃OH

C₂H₅OH

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Halogens on treating with silver salts of acids give

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Alcohol

Ester

Phenol

Alkyl halide

Which of the following fertilizers is useful for paddy rice

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Ammonium nitrate

Ammonium sulphate

Urea

Ammonium chloride

Which one of the following mixture shows positive deviation form Rault's law and forms an azetrope with minimum boiling point

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Methanol + CCI₄

Methanol + acetone

Ether + HCI

Acetone + chloroform

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