Question # 1

If the value of principal quantum number is 3. the total possible values for magnetic quantum number will be

Choose an answer

1

4

9

12

Simple sugars are :

Choose an answer

Monosaccharides

Disaccharides

Oligo saccharides

Trisaccharides

During the process of crystallization, the hot saturated solution:

Choose an answer

is cooled very slowly to get large size crystals

is cooled at a moderate rate to get medium sized crystals of the product

is evaporated to get the crystals of the products

is mixed with an immiscible liquid to get the pure crystals of the product.

ΔH for an endothermic reaction carries

Choose an answer

Positive sign

Negative sign

Both sign

None of these

Which reaction is too vigorous to control

Choose an answer

Chlorination

Bromination

Iodination

Fluorination

Permonosulphuric acid is known as

Choose an answer

Marshall's acid

Carlo's acid

Sulphuric acid

None of these

When fused PbBr₂is electrolyzed

Choose an answer

Bromine appears at he cathode

Lead is deposited at the cathode

Lead appears at the anode

None of these happens

Borax is hydrated:

Choose an answer

Penta

Deca

Hepta

Octa

Statement enthalpy of combustion of H₂is -285.8 KJ mole^-1then which is the standard enthalpy of formation of water

Choose an answer

+285.8 KH mole^-1

-285.5 KJ mole^-1

Zero

-218 KJ mole^-1

The art of electroplating was given by

Choose an answer

Faraday

Edison

Thomas Gradam

Brugan

Hybridization of each carbon atom in benzene ring is

Choose an answer

sp hybridized

sp²hybridized

sp³

dsp²

Among the nitrogen containing fertilizer, the one with about 82% nitrogen content is

Choose an answer

Ammonium nitrate

Ammonia

Ammonium phosphate

Ammonium sulphate

Compounds having same molecular formula but different structures are said to be

Choose an answer

Monomers

Isomers

Metamers

Tautomers

Charge of an electron is:

Choose an answer

1.6 x 10^-19 C

9.1 x 10^-34 C

1.7588 x 10¹¹ C

6.62 x 10^-34 C

Hydrogenation of vegetable oils is accelerated by Ni catalyst. The catalytic activity of Bi is increased by a promoter of activator which is

Choose an answer

Na and K

Na and Hg

Hg and Zn

Cu and Te

The ph of 10-3 mole dm-3 of an aqueous solution of H₂SO₄ is :

Choose an answer

3.0

2.7

2.0

1.5

Dilatometric method is used for rate determination when

Choose an answer

Reactions involving change of optical

Reactions involving change of optical activity

Reactions involving small volume change

None of above

Which of the following has highest dipole moment?

Choose an answer

NH₃

PH₃

AsH₃

SbH₃

d-block elements closely resemble in their physical and chemical properties. Which statement is incorrect

Choose an answer

They show variable valency

Their ions and compounds are coloured

They are good conductors of heat and electricity

Their compounds are diamagnetic

Which of the following has ester linkage?

Choose an answer

Nylon

Bakelite

Terylene

PVC

Acetic acid is miscible in:

Choose an answer

Water

Alcohol

Either

All of these

Reactions that proceed on both sides and never go to completion are called

Choose an answer

Irreversible reactions

Reversible reactions

Opposing reactions

Spontaneous reactions

Planar geometry of molecules is due to

Choose an answer

sp³hybridization

sp²hybridization

sp hybridization

P - p overlap

When during electrolysis of a solution of AgNO₃, 9650 coulombs of charge pass through the electroplating bath, the mass of silver deposited on the cathode will be

Choose an answer

1.08 g

10.8 g

21.6 g

108 g

Mass spectrometer measures the

Choose an answer

Exact mass of an element

Average mass of an element

The number of elements present in a molecule

m/e value of a positive ion

Which one of the following statement is wrong regarding differences between aldehydes and ketones

Choose an answer

Aldehydes undergo reduction to form primary alcohols while ketones undergo reduction to form secondary alcohols

Aldehydes undergo oxidation to form acids having less number of carbon atoms while ketones undergo oxidation to form acids having same number of carbon atoms

Aldehydes give positive silver mirror test while ketones give negative -mirror test

Aldehydes can undergo polymerization while ketones cannot undergo polymerizarion

1-Chlorobutane on reaction with alcoholic potash gives

Choose an answer

But 1-ene

Butan-1-ol

But-2-ene

Butan-2-ol

Which is non typical transition element :

Choose an answer

Ni

Co

Y

Fe

Interstitial compounds have

Choose an answer

Half formula

Fixed formula

Indefinite formula

None

Which step is unnecessary for purification of water for drinking purposes

Choose an answer

Aeration

Coagulation

Treatment with chlorine

Treatment with iodine

Reaction takes place at anode is

Choose an answer

Ionization

Reduction

Oxidation

Hydrolysis

More Classes

Other Links

ECAT Chemistry Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer