Question # 1

The reactivity of Grignard's regent is due to

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Polarity of Mg-x bond

Polarity of C-Mg bond

Electro negativity of halogen atom

Presence of Mg-atom

The nitrogen present to some fertilizers helps plants to

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Fight against diseases

Produce fat

Undergo photosynthesis

Produce protein

Catalyst used to reduce carboxylic acid to alcohol is

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H₂/ Ni

H₂/ pt

NaBH₄

LiAIH₄

A caboxylic acid contains

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a hydroxyl group

a caboxyl group

a hydroxyl and carboxyl group

a carboxyl and an aldehyde group

Which is insoluble in water.

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BeSO4

MgSO4

CaSO4

BaSO4

Which one of the following does not belong to alkaline earth metals.

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Be

Ra

Ba

Rn

Sulphuric acid acts as dehydrating agent in its reaction with.

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Sodium chloride

Potassium nitrate

Copper

Ethyl alcohol

The carbon atom of a carbonyl group is

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sp hybridized

sp²hybridized

sp³hybridized

none of these

In which compound, oxidation state of sulphur is +6

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H2S

H2SO4

H2SO3

SO3

Ortho boric acid on strong beating gives.

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Borax

Boron oxide

Metaboric acid

Tetraboric acid

The conversation of n-hexane into benzene by heating in in the presence of Pt is called

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Isomerization

Aromatization

Dealkylation

Rearrangement

Which of the following is a reddish brown gas

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N₂O₃

NO₂

N₂O₃

N₂O₅

The halogens ae best described by which of the following statements.

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Their outer shell is complete

Most of them are colourless

They all are oxidizing agent

They all are gases at room temperature

Which substance is used to lower the melting point of NaCl in Down's cell

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CaCO3

CaCl2

MgSO4

AlCl3

Fungicides are teh pesticides which

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Control the growth of fungus

Kill insects

Kill plant

Kill herbs

Iodine deficiency in diet is known to cause.

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Beri Beri

Goiter

Rickets

Night blindness

Which one of the following gases exist in monoatomic form.

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Ozone

Nitrogen

Krypton

Phosphine

An aldehyde is reduced to alkane with hydrazine is the presence of

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KOH

NaOH

CaO and NaOH

Ca(OH)2

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