In the extraction of aluminium from alumina by electrolysis, cryolite is added to_______.

(a)

Lower the melting point of alumina

(b)

Remove impurities from alumina

(c)

Decrease the electrical conductivity

(d)

Increase the rate of reduction

AlF₃ is soluble in HF only in the presence of KF. It is due to the formation of _________.

(a)

K₃[AIF₃H₃]

(b)

K₃[AiF₆]

(c)

AIH₃

(d)

K[AIF₃H]

On oxidation with iodine, sulphite ion is transformed to _______.

(a)

S₄O₆^2-

(b)

S₂O₆^2-

(c)

SO₄^2-

(d)

SO₃^2-

Hot concentrated H₂SO₄ is moderately strong oxidising agent which of the following reactions does not show oxidising behaviour?

(a)

\(Cu+2H_{ 2 }{ SO }_{ 4 }\longrightarrow { CuSO }_{ 4 }+{ SO }_{ 2 }+{ 2H }_{ 2 }O\)

(b)

\(Cu+2H_{ 2 }{ SO }_{ 4 }\longrightarrow { CuSO }_{ 4 }+{ SO }_{ 2 }+{ 2H }_{ 2 }O\)

(c)

\(Cu+2H_{ 2 }{ SO }_{ 4 }\longrightarrow { CuSO }_{ 4 }+{ SO }_{ 2 }+{ 2H }_{ 2 }O\)

(d)

\({ CaF }_{ 2 }+{ H }_{ 2 }SO_{ 4 }\longrightarrow { CaCO }_{ 4 }+2HF\)

Which of the following lanthanoid ions is diamagnetic?

(a)

Eu²⁺

(b)

Yb²⁺

(c)

Ce²⁺

(d)

Sm²⁺

Solid CO₂ is an example of ________.

(a)

Covalent solid

(b)

metallic solid

(c)

molecular solid

(d)

ionic solid

The crystal with a metal deficiency defect is ________.

(a)

NaCl

(b)

FeO

(c)

ZnO

(d)

KCl

If the initial concentration of the reactant is doubled, the time for half reaction is also doubled. Then the order of the reaction is______.

(a)

Zero

(b)

one

(c)

Fraction

(d)

none

Addition of sodium chloride to a saturated solution of silver chloride _______.

(a)

dissociation of AgCI increases

(b)

concentration of CI^- decreases

(c)

dissociation of AgCl^- decreases

(d)

concentration of Ag⁺ increases

Faraday constant is defined as_______.

(a)

charge carried by 1 electron

(b)

charge carried by one mole of electrons

(c)

charge required to deposit one mole of substance

(d)

charge carried by 6.22 ×10¹⁰ electrons

The laws of electrolysis were enunciated first by

(a)

Dalton

(b)

Faraday

(c)

Kekule

(d)

Avogadro

Auto catalysis is observed in the reaction given below.
CH₃COOC₂H₅+H₂O➝ CH₃COOH+C₂H₅OH

(a)

CH₃COOC₂H₅

(b)

H₂O

(c)

CH₃COOH

(d)

C₂H₅OH

The correct IUPAC name of the compound

(a)

4 – chloro – 2,3 – dimethyl pentan – 1-ol

(b)

2,3 – dimethyl – 4- chloropentan -1-ol

(c)

2,3,4 – trimethyl – 4- chlorobutan -1-ol

(d)

4– chloro – 2,3,4 – trimethyl pentan – 1-ol

Which has the highest boiling point?

(a)

CH₃CH₃

(b)

CH₃OH

(c)

C₂H₅OH

(d)

C₃H₅

\({ CH }_{ 2 }={ CH }_{ 2 }\overset { i){ O }_{ 3 } }{ \underset { zn/{ H }_{ 2 }O }{ \longrightarrow } } X\overset { { NH }_{ 3 } }{ \longrightarrow } Y \ 'Y'\) is _______.

(a)

Formaldelyde

(b)

di acetone ammonia

(c)

hexamethylene tetraamine

(d)

oxime

A compound 'X' when mixed with ethanol and a drop of concentrated H₂SO₄ gave a compound with fruity odour. Identify 'X'.

(a)

HCHO

(b)

CH₃OH

(c)

CH₃COOH

(d)

CH₃NH₂

P Product ‘P’ in the above reaction is _______.

(a)

(b)

(c)

(d)

Nitrobenzene on electrolytic reduction in con. sulphuric acid, the intermediate formed is

(a)

C₆H₅NH - NHC₆H₅

(b)

C₆H₅ - NHOH

(c)

C₆H₅ - N = N - C₆H₅

(d)

C₆H₅HSO₄

Which one of the following is not produced by body?

(a)

DNA

(b)

Enzymes

(c)

Hormones

(d)

Vitamins

Which among the following contains triglyceride?

(a)

Wax

(b)

Cooking oil

(c)

Essential oil

(d)

Albumin

Carbohydrates are

(a)

polyhydroxy aldehydes

(b)

polyhydroxy ketones

(c)

polyhydroxy acids

(d)

both (a) and (b)

Non stick cook wares generally have a coating of a polymer, whose monomer is _______.

(a)

ethane

(b)

prop-2-enenitrile

(c)

chloroethene

(d)

1,1,2,2-tetrafluoroethane

Which one of the following is employed as antihistamine?

(a)

azithromycin

(b)

ciprofloxacin

(c)

cetirizine

(d)

neomycin

Oxidation of fats and oils is prevented by ____________.

(a)

BHT(Butyl hydroxy toluene)

(b)

BHA(Butyl hydroxy anisole)

(c)

Both (a) and (b)

(d)

Neither (a) nor (b)

Glyptal is a polymer of _______

(a)

ethylene glycol and terypthaliic acid

(b)

ethylene glycol and pthalic acid

(c)

adipic acid and hexamethelene diamine

(d)

phenol and formaldehyde