Question # 1

Which gas act as 'Blistering agent'

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Acetylene

Phosphine

Phosgene

Mustard gas

Element of which group reacts with hydrogen and form ionic hydrides.

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II A

IV A

V A

VI A

Which raw material is used for preparation of bleaching powder.

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Cl2 and H2O

Cl2 and Lime

Cl2 and HOCl

HCl and Lime

The electrophile in Aromatic sulphonation is

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H₂SO₄

HSO₄^1-

SO₃

SO₃¹⁺

Among the following the compound that can be most readily suphonted is.

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Toluene

Benzene

Nitrobenzene

Chlorobenzene

The addition of unsymmetrical reagent to an unsymmetrical alkene is in accordance with the rule

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Hund's rule

Markowikov's rule

Pauli's Exclusion Principle

Aufbau Principle

Sodalime is

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NaOH

Mixture of Na and Ca(OH)2

KOH

Mixture of CaO and NaOH

The basis of modern periodic table is

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Electron affinity

Atomic mass

Ionization Potential

Atomic number

In group V-A elements the most electronegative elements is

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Sb

N

P

As

The carbon atom of a carbonyl group is

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sp hybridized

sp²hybridized

sp³hybridized

none of these

To prevent corrosion, Iron pipes carrying drinking water are covered with zinc by

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alley formation

Electroplating

Galvanizing

Soldering

In which compound, oxidation state of sulphur is +6

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H2S

H2SO4

H2SO3

SO3

Lowest oxidation state of nitrogen is present in.

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NH3

NO2

NO

HNO3

The brown gas formed when metal reduces HNO₃

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N₂O₅

N₂O₃

NO₂

NO

The aromatic ring of Benzene can be hydrogenated in the presenc eof.

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Pt

Rh

Sunlight

O3

Paraldehyde is used as a

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Medicine

Poison

Polymer

Dye

The number of acidic hydrogen present in 1- Propyne is

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1

2

3

4

m-choronitro benzene is prepared by

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Nitration of chlorobenzene

Nitration of Benzene

Chlorination of Nitrobenzene

Nitration of m-chlorobenzene

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