Question # 1

Acetaldehyde reacts usually with

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Electrophiles only

Nucleophiles only

Electrophiles and nucleophiles

Free radicals only

silicones are

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Some salts of sodium

Allotropes of SI

Inorganic polymers

Coloured compounds of Si

Which of the following is an addition polymer

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Polyester

Polystyrene

Nylon 6,6

Terylene

Which element has lowest melting point

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Beryllium

Magnesium

Calcium

Barium

Reverse of esterification is known as

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Trans esterification

Saponification

Hydrolysis

Neutralization

m-choronitro benzene is prepared by

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Nitration of chlorobenzene

Nitration of Benzene

Chlorination of Nitrobenzene

Nitration of m-chlorobenzene

-------------------- is Alcohol in the following

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CH₃.CH₂.OH

CH₃.O.CH₃

CH₃COOH

CH₃.CH₂.SH

When CO₂is made to react with ethyl magnesium iodide, followed by acid hydrolysis, the product formed is

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propane

propanoic acid

propanal

propanol

Which acid can not be stored in glass bottles.

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HCl

HF

H2SO4

HNO3

The colour of transition metal complexes

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d-d transitions of electrons

paramagnetic nature of transition elements

ionization

loss of s-electron

Micro-nutrient is required in quantity for plant growth ranging from

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4-40 gm

6-200 gm

6-200 kg

4-40 kg

f - block elements are also called.

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Non typical transition elements

Outer transition elements

Inner transition elements

None of true

The ore CaSO4.2H2O has the general name.

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Gypsum

dolomite

Calcite

Epsom salt

Boiling point range of petroleum ether.

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5- 20 ^oC

10- 30^oC

20- 60^oC

30- 90^oC

Colour of which halogen is not correctly related.

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F2 --- colourless gas

Cl2---- greenish yellow gas

Br2----- Reddish brown liquid

I2-------- grayish Black solid

The presence of a double bond in a compound is the sign of

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Saturation

Un-saturation

Substitution

None of these

Which of the following will have the highest boiling point.

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Methanal

Ethanal

Propanal

2-Hexanone

Which is called milk of magnesia.

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MgCO3

Mg(OH)2

MgSO4

MgCl2

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