Ionic reactions occur in

Photo-chemical reactions occur in presence of

A

Sunlight

B

Darkness

C

Solid catalysts

D

Monochromatic radiation only

Which of the following is not the properties of an ionic compound?

A

Soluble in water and insoluble in petrol

B

High melting and boiling points

C

Low melting and boiling points

D

Solid and hard

The molecule which has the highest percentage of ionic character among the following is

A

HI

B

HF

C

HCI

D

HBr

Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals.

A

Organic peroxides

B

Sulphuric acid

C

Hydroflouric acid

D

None of these

Mark the compound which possess ionic, covalent and coordinate bonds.

A

NH₄Cl

B

SO₃

C

SO₂

D

H₂O

The unit of ionic product of water (Kw) is :

A

Mol² let^-1

B

Mol² let^-2

C

Mol^-1 let^-2

D

Mol^-1 let^-1

Losses which occur in rotating electric machines and do not occur in trans formers are

A

friction and windage losses

B

magnetic losses

C

hysteresis and eddy current losses

D

copper losses

The "sum of all" chemical reactions in "an organism's" living cells "are" called "its" metabolism."No Error"

A

sum of all

B

an organism's

C

are

D

its

The "sum of all" chemical reactions in "an organism's " living cells "are" called "its" metabolism. "No Error".

A

sum of all

B

are

C

its

D

No Error

কোন যৌগটিতে একের অধিক ধরনের সংকরিত কার্বন আছে?(Which of the following reactions has concentration time plot different from others?)

A

Cyclohexane

B

Benzene

C

Toluene

D

n-butane

Ionic reactions occur in

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