Question # 1

The formation of ester from acetic aciad in presence of acid and ethanol is a

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Nucleophilic substitution reaction

Nucleophilic addition reaction

Electrophilic substituion reaction

Electrophilic addition reaction

The process of effusion is best understood by law

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Grahams

Boyle s

Charles s

Avogadro s

Diffusion of different species is due to difference of

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potential energy

temperature

density

all the above

Lattice energy is also termed as

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ionization

crystal energy

dissociation

bond energy

Liquids have definite volume due to

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Negligible spaces

Intermolecular force

Motion

Both a and b

Reason of pollution are:

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Population and urbanization

Transportation

Industrialization

All of these

Dipole-dipole forces are present between:

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non-polar molecules

polar molecules

both polar and non-polar

none pf above

Chloroform (CHCl3) is?

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Primary alkyl halide

Secondary alkyl halide

Tertiary alkyl halide

a liquid

In an electrochemical series, elements are arranged on the basis of

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pH scale

pKa scale

pOH scale

Hydrogen scale

Which of the following is the unit for pressure of a gas in system international

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Nm^-2

mm of Hg

atmosphere

torrr

Pyridine is an example af

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Homocyclic compound

Heterocyclic compound

Carbocyclic compound

Aliphatic compound

Cyanohydrin of which of the following forms lactic acid

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HCHO

CH₃COCH₃

CH₃CHO

CH₃CH₂CH₂CHO

Which quantum number is sufficient to describe the electron is hydrogen atom?

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l

n

m

s

Which one of the following properties is not correct for ozone?

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It oxidizes lead sulphides

It oxidizes potassium iodide

It oxidizes mercury

It cannot act as a bleaching agent

A solution of two component is called

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Binary solution

Dilute solution

Original solution

Standard solution

Action of Zn with alkyl halides in the presence of an inert solvent forms higher alkanes. This reaction is known as

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Wurtz reaction

Frankland's reaction

Cannizaro reaction

Kalobe's reaction

In a period, melting points of elements

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Increases

Decreases

Remain constant

First increases then decreases

The divisibility of atom was shown by

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Stoney

J.J. Thomson

Millikan

Rutherford

Mustard gas is a

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Gas

High boiling speed

High melting liquid

Steam

Mottling of teeth is due to presence of an element in drinking water

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Mercury

Fluorine

Boron

Chlorine

With increases of 10°C temperature the rate of reactiondoubles. This increase in rate of reactionis due to :

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Decrease in activation energy or reaction.

Decrease in number of collisions between reactant molecules.

Increase in activation energy of reactants.

Increase in number of effective collisions

Reaction takes place at anode is

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Ionization

Reduction

Oxidation

Hydrolysis

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