Question # 1

Which of the following statement is correct for a chemical reaction to occur molecules of substances must

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Collide with each other

Collide with energy more than activation energy

Collide with energy less than activation energy

Collide with high frequency

An oxidixing agent

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K₂Cr₂O₇

H₂SO₄

FeSO₄

K₂SO₄

The catalyst,. which is used as specialist for cracking, are

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Aluminates

Alumlnosilicates

Aluminium slats

All can be used

The entropy of the universe

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Constant

Is equal to zero

Decreasing

Increasing

The credit of discovering neutron goes to

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Rutherford

Langmuir

Chadwick

Austen

Metals which are above SHE in electrochemical series

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Can liberate H₂from acid

Cannot liberate H₂from acid

Cannot always liberate H₂from acid

None of these

The use of tetra ethyl lead in petrol as an efficient antiknock agent is being discouraged. Which reason is correct

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It is costly

It damages the engine

Pb is difficult to obtain in bulk quantities

The combustion product, lead, causes air pollutions

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KC = KP

Kp = KcRT

Kp = kc(RT)^-2

Kp = Kc(RT)^-1

If heat absorbed in the reaction, the process is said to be

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Exothermic

Isothermal

Adiabatic

Endothermic

The substance which is present in large quantity is called a :

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Solute

Solvent

solutiion

None of Above

Phenols are derivative of:

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Alkanes

Alkenes

Alkynes

Benzene

Violet colour is obtained when dilute CuSO₄is added in alkaline solution of protein. This test is known as

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Biuret

Xanthoproteic test

Hopkins-cole

All of these

Sulphonation of benzoic acid produces mainly

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o-Sulphobenzoic acid

m-sulohobenzoic acid

p-Sulphobenzoic acid

o-and p-Sulphobenzoic acid

Common names of carboxylic acids are given by then:

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Source

Person discovered

place

habit

The next homologue of C₁₀H₂₂will be

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C₉H₂₀

C₁₂H₂₆

C₁₁H₂₄

C₁₃H₂₈

Benzene is prepared from n-hexane in the presence of catalyst

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Cr₂O₃

Al₂O₃

SiO₂

All above

Terylen fibre is made by reaction of terephthalic acid with

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Ethylene

Ethylene glycol

Glycol

Terylene

The less reactivity of transition metal is due to

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High heats of sublimation

High ionization energies

Low heats of salvation

All these

The method involved for electrolysis of Na or K salts of carboxylic acids

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Sabatier's sendrens reaction

Kolbe's method

Clemmensen

Wolf kishner reduction

Carboxylic acids generally exists in cyclic

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Monomers

Dimers

Trimers

Tetrameter

Where energy is released during a reaction it is

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Exothermic reaction

Endothermic reaction

A free radical reaction

A bond breaking reaction

The most reactive compound for electrophilic nitration will be

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Benzyl chloride

Benzoic acid

Nitrobenzene

Chlorobenzene

Grignard's reagent on treatment with dry CO₂and HCI yields

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Ester

Alcohol

Carboxylic acid

Aldehyde

A compound X contains 50% sulphur and 50% oxygen by mass. What is the empirical formula of compound X?

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SO

SO₂

SO₃

SO₄

In the electrolysis of fused bauxite (Al₂O₃2H₂O) with fused Cryolite (Na₃AlF₆) using carbon rods as anode. The product obtained at cathode is

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Na metal

F₂gas

Al metal

O₂gas

The largest number of molecules are present in

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3.6 g of H₂O

4.8 g of C₂H₅OH

2.8 g of CO

5.4 g of N₂O₅

which enzyme is not involved in the fermentation of starch ?

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Diastase

Zymase

Urease

Invertase

Which of the following reaction is characteristic of benzene

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Electrophilic substitution reaction

Reduction

Oxidation

Ozonolysis

C₆H₁₂O₆ is molecualr formula of:

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Glucose

Dextrose

Fructose

All of these

Which alcohol gives only one oxidation product when wormed with dil acidified K₂Cr₂O₇

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Butan-1-ol

Butan-2-ol

2-methyl propan-1-ol

2-methyl propan-2-ol

Alkanes are least reactive towards:

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Acids and bases

Reducing agents

Oxidizing agents

All of these

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