Question # 1

Phenol is heated with CCl₄and alkaline KOH when salicylic acid is produced. The reaction is known as

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Frledel-Craft reaction

Riemer-Tiemann's reaction

Rosenmund's reaction

Sommelet reaction

The dimension of rate constant of second order reaction involves

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Neither time nor concentration

Only time

Time and concentration

Time and square of concentration

Which of the following halogens does not form its oxyacids?

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F

Cl

Br

I

A solution of sodium sulphate was electrolysed using some inert electrodes. The products at the electrodes are

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O_2,H₂

O_2,Na

O_2,SO₂

O_2,S_2O^2-₈

SO₂ and NO₂produce pollution by increasing

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Alkalinity

Acidity

Neutrality

Buffer action

Wt. of 112 ml of oxygen at NTP on liquification would be

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0.32 g

0.64 g

0.16 g

0.96 g

Which one of the following elements occurs free in nature?

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N

P

As

Sb

Which one is not usually used for the crystallization?

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Acetone

Acetic acid

Sulphuric acid

Chloroform

Which of the following species participate in sulphonation of benzene ring?

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H₂SO₄

HSO^-₃

SO₃

SO^-₂

Bell metal is an alloy of

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Cu, Zn and Sn

Cu, Zn and Ni

Cu and Zn

Cu and Sn

The formula of nitre is

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KNO₃

NANO₂

NaCl

Na₂CO₃

Which species represents the electrpohile in aromatic nitrotaion?

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NO^-₂

NO⁺₂

NO2

NO^-₃

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

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BaCl₂

KCl

NaCl

MgCl₂

Ammonia gas used directly as a fertilizer is injected into the soil at a depth of about

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Two inches

Three inches

Five inches

Six inches

Water (H_2O) is liquid while hydrogen sulphide (H₂S) is a gas because

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Water has higher molecular weight

Hydrogen sulphide is a weak acid

Sulphure has high electronegativity than oxygen

Water molecules associate through hydrogen

Iron, once dipped in concentrated H₂SO₄, does not displace copper from copper sulphates solution, because

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It is less reactive than copper

A layer of sulphates is deposited on it

An inert layer of iron oxide is deposited on it.

All valence electrons of iron are consumed.

Galena is an ore of

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Gallium

Lead

Tin

Germanium

Portland cement is manufactured by using

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Limestone, clay and sand

Limestone, gypsum and sand

Limestone, gypsum and alumina

Limestone, clay and gypsum

Inert pair effect plays an important role in case of

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F

Al

Si

Tl

In the manufacture of iron from haematite, limestone is added to act as.

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Flux

A reducing agent

Slag

An oxidizing agent

Which of the following fluorides of xenon is impossible?

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XeF₂

XeF₃

XeF₄

XeF₆

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