Question # 1

An aldehyde compound can be reduced to alkane by

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Wurtz reaction

Grignard reaction

Wolf Kishner reaction

Kolbe's reaction

In [Co(NH3)6]+3 the coordination number of cobalt is.

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Zero

Two

Four

Six

------------- metal is used in the Thermite process because of its reactivity

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Tron

Copper

Aluminium

Zinc

Which substance is used in photography

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AgCl

AgBr

AgI

Ag3PO4

The electrophile in Aromatic sulphonation is

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H₂SO₄

HSO₄^1-

SO₃

SO₃¹⁺

Variable valency is generally exhibited by

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Transition elements

Alkali metals

s-block elements

Gaseous elements

Thickness of the atmosphere is

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100 km

500 km

1000 km

1500 km

Most likely product formed when formic acid is dehydrated in the presence of conc. H2SO4 is.

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CO2 and H2O

CO, CO2 and H2O

CO2 and H2

CO and H2O

The number of possible isomers of xylene are

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2

3

4

5

Which one is the heterocyclic compound of oxygen

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Pyrridine

Parrole

Furan

Thiophene

Ethyne on oxidation with strong alkaline KMnO4 changes to

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Ethyl alcohol

Acetaldehyde

Vinyl alcohol

Glyoxal

Which woody raw material is used for the manufacture of paper pulp

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Cotton

Biogases

Rice straw

Poplar

Which of the following has highest M.P

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Aluminium

Silicon

Phosphorus

Sulphur

Which reagent is used to reduce a carboxylic group to an alcohol

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N₂/ Ni

H₂/Pt

NaBH₄

LiAIH₄

The chemical formula of Sodium Bromite is.

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NaBrO

NaBrO2

NaBrO3

NaBrO4

In a period, from left to right in the periodic table, the size of atom generally.

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Increases

decreases

Remains constant

First increase upto the middle of period and then decreases

Which one of the following elements exhibits s-inert pair effect.

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B

Al

Pb

Sc

Elimination biomolecular reactions involve.

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First order kinetics

Second order kinetics

third order kinetics

Zero order kinetics

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