Question # 1

Which of the following is different from the other three oxides?

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MgO

SnO

ZnO

Cr₂O₃

Acetic anhydride is obtained form acetyl chloride by the reaction of

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P₂O₅

H₂SO₄

CH₃COONa

CH₃COCH₃

Which one of the following elements occurs free in nature?

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N

P

As

Sb

In a crystal a ≠ b ≠ c, a = γ = 90° and β ≠ 90°, it is

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Monoclinic

Rhombic

Trigonal

Tetragonal

The rotation of two carbon atoms joined by double bond would happened only if

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Pi bond is broken

Sigma bond is broken

Both bonds are broken

None of above

The treatment of benzene with isobutene in the presence of sulphuric acid give

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Isobutyl benzene

Tert-Butyl benzene

n-Butyl benzene

no reaction

Hydrolytic conversion of sucrose into glucose and fructose is known as

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Induction

Inversion

Insertion

Inhibition

Evaporation of water is

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An exothermic change

An endothermic change

A process where no heat changes occur

A process accompanied by chemical

The main structure features of proteins is

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An ester linkage

An ether linkage

The peptide linkage

All

Which of the following pairs are chemically dissimilar?

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Na and K

Ba and Sr

Zr and Hf

Ca and Zn

Which of the following with aqueous KOH will give acetaldehyde?

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1,2-Dichloroethane

1, 1-Dichloroethane

Chloroacetic acid

Ethyl chloride

Galena is an ore of

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Gallium

Lead

Tin

Germanium

Bromine is obtained on a commercial scale from

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Caliche

Carnallite

Common satl

Cryolite

Setting of Plaster of Paris involves

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Oxidation with atmospheric

Combination with atmospheric CO₂

Dehydration

Hydration to yield another hydrate

Maximum number of active hydrogens

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Acetic acid

Glycerol

Methane

Methanol

On heating acetaldehyde with ammonical silver nitrate solution, we get

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CH₃OH

Silver acetate

HCHO

Silver mirror

Which of the following method is most appropriate for the manufacture of methane?

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By reduction of CH2SL2

Wurtz reaction

Liquification of natural gas

None of these

Ethyl chloride on treatment with aqueous alkali gives

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Ethane

Ethene

Ethanal

Ethanol

A cell constant is generally found by measuring the conductivity of aqueous solution of

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BaCl₂

KCl

NaCl

MgCl₂

Inter molecular forces in solid hydrogen are

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Covalent forces

Van der Waal forces or London dispersion forces

Hydrogen bonds

All of these.

Which of the following with aqueous KOH will give acetaldehyde?

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1, 2-Dichloroethane

1, 1-Dichloroethane

Chloroacetic acid

Ethyl chloride

The number of atoms contained in 11.2 L of SO₂at S.T.P are

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3/2 x 6.02 x 10²³

2 x 6.02 x 10²³

6.02 x 10²³

4 x 6.02 x 10²³

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