Question # 1

Which of the following in incorrect?

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FelCl₃is used in the detection of phenols

Fehling solution is used in the detection of glucose

Tollen's reagent is used in detection of unsaturation

NaHSO₃is used in the detection of carbonyl compounds

Ricket is caused due to the deficiency of vitamin

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A

D

B

E

During the preparation of alkanes the hydrogenation of alkenes or alkynes the catalyst may be

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H₂SO₄

Ni

Fe₂O₃

Al₂O₃

The process of osmosis was first discovered by

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Nollet

Pfeffer

Traube

Dutrochet

A catalyst is a substance which increase the rate of a chemical reaction, but remains unchanged at the end of reaction, nut remains unchanged at the end of reaction, because

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It increases the temperature

It increase the surface area

It increases the rate constant

It decrease the energy energy of activation

N₂+3H₂⇌ 2NH_{3 + Heat for above equation, themaximum product will be obtained at :}

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Low temperature at high pressure.

High temperature and low pressure.

High temperature and high pressure.

Low temperature at low pressure.

Solvent extraction is an unstable, Process and it is called by:

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The amount of solute

Distribution law

The amount of solvent used

Law of mass action

The reaction of 4-bromobenzyl chloride with NaCN in ethanol leads to

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4-Bromobenzyl cyanide

4-Cyanobenzyl chloride

4-Cyanobenzyle cyanide

4-Bromo 2-cyanobenzyl chloride

N₂O₄⇌ 2NO₂

For the above reaction, which of the Following expression of K_c correct :

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Kc = [ N₂O₄]/[ NO₂]²

Kc = [ N₂O₄]/ [NO₂]

Kc = [ N₂O]²/[ N₂O₄]

Kc = [ N₂O₄]/[ N O₂]

Corrosion reaction are

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Spontaneous redox reaction

Non-spontaneous acid-base reactions

Spontaneous acid-base reactions

None of these

The rate of which the reaction proceeds is directly proportional to the product of the active masses of the reactants is according to

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Law of mass action

Le Chateliers principle

Equilibrium law

Law of constant proportion

The tip of the funnel should touch the side of the beaker in order to avoid :

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Splashing.

Leakage.

Mixing.

Contamination.

The carbon atom of a carbonyl group is

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Sp hybridized

Sp²hybridized

Sp³hybridized

None of these

The solution of which acid is used for seosoning of food ?

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Formic acid

Acetic acid

Benzoic acid

Butanoic acid

Which of the following is not a fatty acid?

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Propanoic acid

Acetic acid

Phthalic acid

Butanoic acid

The osmotic pressure of solution increases if

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Temperature is decreased

Solution constant is increased

Number of solute molecules are increased

Volume is increased

When alkyl halides are heated with aqueous solution of ammonia at about 100°C, amines are formed. This reaction is known as

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Williamsons synthesis

GHoffmans reaction

Wurtz reaction

Clemensen reaction

Which of the following undergoes uncleophilic substitution exclusively by S_N1 mechanism?

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Benzyl chloride

Ethyl chloride

Chlorobenzene

Isopropyl choride

Which one of the following has been hydroxyl and carboxylic acid groups

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Phenols

Picric acid

Phthalic acid

Salicylic acid

Among the lanthandes the one obtained by synthetic method is

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Lu

Pm

Pr

Gd

Odour of alkene is:

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Fruity

Odourless

Zarlic like

Irritating

Acetylene when treated with 10% H₂SO₄in the presence of HgSO₄adds one molecule of water to form

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Aldehydes

Esters

Alcohols

Acids

Which of the following will not give iodoform test?

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Ethanol

Ethanal

Isopropyl alcohol

Benzyl alcohol

How many molecules of chlorine adds in benzene in the presence of sunlight

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One

Two

Three

Four

Gradual addition of electronic shells in the nobel gases causes a decrease in their

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Ionization energy

Atomic radius

Boiling point

Density

The total number of transition elements is

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10

14

40

50

A complete chemical Characterization of a compound must include:

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Qualitative analysis

Chemical analysis

Quantitative analysis

None of above

An alcohol with molecular formula C_nH_2n+1OH has a chiral carbon atom but does not react with MnO^-₄/H⁺what is the least number of carbon atoms such an alcohol could possess

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5

6

7

8

If Grignard reagent is allowed to react with another alkyl halide the main product is

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An alkane

Cyclo alkane

Alkyne

An alkene

Each molecule of haemoglobin is 68000 times heavier than one atom of

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C

H

N

O

The tendency of an atom to attract shared electron pair towards itself is called

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Covelent bond

Electronegativity

Ionization potential

Electronic affinity

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