Question # 1

The degree of dissociation of weak acid increases with.

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Decreasing pressure

Increasing pressure

Increasing concentration

Decreasing concentration

In the electronic structure of acetic acid,the total number of shared and unshaped pair of electrons are respectively.

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16 ,8

8 ,4

12 ,8

8 ,12

Which of the following is atmospheric pollutant.

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CO2

CO

O2

N2

Linear molecules have ____________ axis of rotation

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C1

C2

C

C3

Ozone layer of upper atmosphere is being destroyed by

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chlorofluorocarbons

SO2

Photochemical oxidants O2 and CO2

Smog

Which of the following reactions does not take place with light radiation.

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Oxidation

Reduction

Polymerization

Double displacement

The simplest formula of a compound containing 50% of element X

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XY2

XY

X2Y

None of the abvoe

The unequal sharing of bonded pair of electrons between the two atoms in a molecule causes.

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Dipole

Radical formation

Decomposition of found

Covalent found

Which among the following is least soluble in water.

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NaF

LiF

KF

CsF

The normality of 2.3 M H2SO4 solution is.

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0.46 N

0.23 N

2.3 N

4.6 N

Which of the following is not an ore of iron.

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Haematite

Magnetite

Siderite

Monazite

A chemical reaction resulting in a change in the electric charge on the reacting particles may be called as.

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Add ion reaction

Redox reaction

Elimination reaction

Chain reaction

DDT is

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Biodegradable pollutant

Nodegradable contaminant

Air pollutant

An antibiotic

In a system of designating wrought aluminum alloys a sour digit number is used what does the first digit indicate.

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The purity of aluminum

The identity of the alloy

The alloy group

All of above

Which of the following materials is not suitable as adsorbent for chromatography.

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Silica gel

Activated charocal

Alumina

Calciu7m chloride

Which of the following bonds between carbon -carbon is teh strongest.

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Sigma bond

Pi bond

Double bond

Triple bond

What is the following is incorrect.

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Water is more polar than H2S

H2O2 is a planar molecule

Heavy water is produced by the exhauative electrolysis of water made acidic

H2O2 act both as oxidising as well as reducing agent in acidic medium

The hybridization of sulphur in sulphur dioxide is.

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sp

sp2

sp3

dsp2

Which of the following statements is not related with entropy.

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It is a measure of disorder

It is a measure of unavailable energy

It is a function of thermodynamics probability

It is a path function

The half life period of any first order reaction.

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Is half the specific rate constant

Is independent of the initial concentration

Is always the same whatever the reaction

Is directly proportional to the initial concentration of the reactant

Example of intra molecular hydrogen bonding.

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O-nitrophenol

O-hydroxy benzaldehyde

O- hydroxy benzoic acid

All of the above

What refers to the deterioration of material by oscillatory relative motion of small amplitude between two solid surfaces in a corrosive environment?

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Stray current corrosion

Microbiologicla corrosion

Fretting corrosion

None of these

1-Butyne on oxymereuration -demercuration would give.

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Butanone

Butanal

Propanol and methanol

Propanoic acid and formic acid

Which of the following statements regarding phenols is not correct.

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Phenol ls are stronger acids than water and alcohols.

Phenol are weaker acids than carboxylic acids

Phenol are solubel in both aqueous NaOH and aqueous sodium hydrogen carbonate

Phenoxides ions are more stable than the corresponding phenol

Which of the following statements is incorrect.

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The elements of group 18 are known as aerogens.

Group 2 elements are all metals

Metallic character increase on going down a group

All the elements belonging to a particular period have same valence shell configuration.

Which of the following techniques is used to reduce the need for large volumes of organic solvents.

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Solid phase extraction

Gel permeation

Electrophoresis

TLC

Which of the following has hexagonal structure.

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Sodium chloride

Potassium choride

Diamond

Graphite

All the halogen form oxyacide, except

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Florine

Chlorine

Bromine

Iodine

Which of the following iso electronic spices has the highest IE.

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Ne

Na+

F

O2-

Which of the following exists as polymeric chains in solid state.

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Sr Cl2

Ba Cl2

MgCl2

BeCl2

Which of the following relation corresponds to Faraday law of electrolysis.

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m = ZI t

E = mc²

E = ho

None of the above

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