Question # 1

The correct order of 2nd l.P. of C,N,O and F is

Choose an answer

O > F > N > C

O > N > F > C

C > N > O > F

F > O > N > C

Which compound shows hydrogen bonding

Choose an answer

C₂H₆

C₂H₅CI

CH₃-O-CH₃

C₂H₅OH

A polymer may be

Choose an answer

Linear

Branched

Cross linked

All of these

Choose an answer

Decrease in temperature favour more dissolution of the salt

Increase in temperature favour more dissolution of the salt

Lowering pressure favour more dissolution of the salt

Increasing pressure favour more dissolution of the salt

Which statement is incorrect for and ideal solution

Choose an answer

The forces of attractions between solute and solvent molecules are same

There is no evolution or absorption of heat

Volume of the solution is less than sum of volumes of individual components

Vapour pressure of solution is directly proportional to the mole fraction of solvent

If the rate equation of a reaction 2A+B-------->Products is , Rate = K[A] [B], and A is present in large excess, then order of reaction is :

Choose an answer

1

2

3

Above

Prevention of corrosion of iron by Zn coating is called

Choose an answer

Galvanization

Cathodic protection

Electrolysis

Photoelectrolysis

The amount of solute present in the given amount of solvent is called

Choose an answer

Molarity

Molality

Concentration

Solubility

The best buffer is prepared when molar concentrations of the salt and acid are equal, then its pH and pKa value are related

Choose an answer

pH = pKa

pH < pKa

pH > pKa

pH x pKa = 14

SN₂reactions can be best carried out with:

Choose an answer

Prl. alkyl halide

Sec. Alkyl halide

Ter. Alkyl halide

All of three

Bell metal is an alloy of

Choose an answer

Cu, Zn, and Sn

Cu, Zn and Ni

Cu and Zn

Cu and Sn

Which of the following is not a fertilizer

Choose an answer

Nitrophos

Dolomite

Super phosphate of lime

Urea

Which statement is not correct

Choose an answer

Enzymes catalyst a specific reaction

Enzymes show catalytic activity at a specific temperature

The catalytic activity of enzymes is stopped if optimum pH is changed

The catalytic activity is poisoned by a co-enzymes

Two or more similar monomers combine to form:

Choose an answer

Homopolymer

Copolymer

Ter polymer

Thermoplastic polymers

Carboxylic acids on complete reduction in the presence of HI and red Phosphours gives:

Choose an answer

esters

alcohols

alkanes

aldehydes

Treatment of a secondary alcohol with a suitable oxidizing agent (K₂Cr₂O₇) results in the formation of

Choose an answer

Ketone

Aidehyde

Ether

Alkyl halide

Smallest charge of electricity that has been measured so far is

Choose an answer

Charge on a-rays

Charge on electron (1.602 x 10^-19C)

Charge on x-rays

Charge on gamma rays

In sp²type hybridization the three equivalent sp²orbitals lie in the same plane and at angle of

Choose an answer

0°

60°

120°

180°

Which one of the following reaction takes place spontaneously

Choose an answer

2, 2, 4-trimethylpentane

2, 4, 4-trimethylpentane

2, 4, 4-methyepentane

2, 2, 4-methylpentane

The most acidic of the following compounds is

Choose an answer

P₂O₃

Sb₂O₃

B₂O₃

As₂O₃

Acid rain is due to increase in atmospheric concentration of

Choose an answer

Ozone and dust

CO₂and CO

SO₃and CO

SO₂and NO₂

Benzene reacts with ozone and gives

Choose an answer

Glycerin

Glyoxal

Maleic anhydride

Benzoic acid

Identification of a substance, determination of its structure an quantitative analysis of its composition are the aspects covered by:

Choose an answer

Modern analytical physics.

Mechanical chemistry.

Biochemistry.

Modern analytical chemistry.

Pro stand for

Choose an answer

Valine

Alamine

Glycine

Proline

Molecules of High molecular weight usually greater than 10,000 are called:

Choose an answer

Macro molecules

Mega molecules

Poly molecules

Gega molecules

In electronic watches or electronic calculators the tiny batteries used are

Choose an answer

Alkaline battery

NICAD battery

Fuel cell

Silver oxide battery

The substance upon which an enzyme acts is known as its

Choose an answer

Domain

Field

Substrate

Reactant

Glycogen is stored in

Choose an answer

Animals

Plants

Soil

None of these

What is formed when oxalic acid is dehydrated by conc. H₂SO₄?

Choose an answer

C + CO₂

CO

CO₂

CO + CO₂

Cell in which an electric current drives a non-spontaneous reaction is called

Choose an answer

Electrolytic cell

Voltaic cell

Biological cell

Electrochemical cell

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