Question # 1

Alcohol fermentation is brought about by the action of

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CO₂

O₂

Invertase

Yeast

The oxidation number of Mn is KMnO₄is

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+2

+4

+6

+7

When a metal is dipped in 1 molar of its solution at 298 K. then potential set up is called

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Standard electrode potential

Electric charge

Ionization potential

Electroplating

The rate of reaction between two specific time intervals is called

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Instantaneous rate

Average rate

Specific rate

Ordinary rate

Either, an organic compound has close resemblance in structure and thus a derivative of:

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Water

Oxides of lithium

Oxides of magnisium

Oxides of aluminium

denaturing of alcohol is done by adding methanol in ethanol:

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10%

20%

30%

40%

The chemist who synthesized urea from ammonium cyanate was

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Berzelius

Kolbe

Wholer

Lavoisier

Sometimes a yellow turbidity appears while passing H₂S gas even in the absence of II group radicals. This is because

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Sulphur is present in the mixture as impurity

IV group radicals are precipitated as sulphides

Of the oxidation of H₂S gas by some acid radicals

III group radicals are precipitated as hydroxides

Which of the following is obtained by condensation polymerization?

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Polyethene

Teflon

Phenol formaldehyde resin

Nitrile rubber

During electrolysis, electrons are :

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Lost by anions and gained by cations

Gained by anions and lost by cations

Gained only

Lost only

The factor which effect the rate of reaction

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Nature of reactants

Surface area

Light

All of the above

A polymer may be

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Linear

Branched

Cross linked

All of these

strength of an acid can be determined by

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P^ka

P^kp

P^oH

P^kw

The substance which increases rate of reaction but remains unchanged at the end of reaction is called :

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Catalyst.

Indicator.

Promoter.

Activator.

Alkanes have functional group :

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----X

--OH

----COH

No functional group

Sodium phenoxide reacts with CO₂at 400 K and 4.7 atm pressure to give

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Sodium salicylate

Salicyl aldehyde

Catechol

Benzoic acid

Red P can be obtained form white P by

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Heating it with a catalyst in an inert atmosphere

Distilling it in an inert atmosphere

Dissolving it in CS₂and crysllizing

Melting it ad pouring the liquid into water

Which of the following statement about fluorine is not correct?

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Electron affinity of chlorine is greater than that of fluorine

Bond energy of fluorine is less than that of chlorine

Fluorine cannot be prepared by electrolysis of fused metal fluorides

Fluorine does not form oxoacid

Which of the following discoveries resulted in a version of the Mendeleefs

periodic law

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The nucleus of atom by Rutherford

The elements polonium and radium by the Curies

Atomic numbers by Moseley

x-rays by Roentgen

In the hydrolysis of CH₃COOC₂H₅the acid produced is

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Inhibitor

Catalyst

Auto catalyst

None of above

f-block elements are called :

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Alkali metal

Alkakline earth metals

Transition elements

Electron deficient elements

Ionic radius, in a period from left to right

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Increases

Decreases

Decreases then increases

Increases and decreases

Sodium forms largely

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Normal oxides

Per-oxides

Superoxides

None of these

When vapours of isopropyl alcohol are passed over heated copper, the major product obtained is

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Propane

Propylene

Acetaldehyde

Acetone

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32

64

16

4

A compound of the formula C₄H₁₀O_{reacts with sodium and undergoes oxidation to give a carbonyl compound which does not reduce Tollen's reagent, the original compound is}

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Diethyl ether

n-Butyl alcohol

Isobutyl alcohol

sec-Butyl alcohol

When electrically is passed through molten Al₂O₃+ Na₃AlF₆and 13.5 gms of Al are deposited, the number of farady must be

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0.5

1.0

1.5

2.0

Which three elements are needed for the healthy growth of plants

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N, S, P

N, Ca, P

N, P, K

N, K, C

Grignad reagent is reactive due to

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The presence of halogen atom

The presence of Mg atom

The polarity of C - Mg bond

None of above

The forced which holds together two or more atoms or ions to form a large variety of compounds in called:

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A chemical bond.

An ionic bond.

A covalent bond.

A coordinate bond.

Which of the following statements is incorrect about vitamins

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Often function as coenzymes

Molecules contain at least one ring structure

Are often synthesized by the body

Are polyfunctional compounds

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