Question # 1

Concentration of rectified spirit is:

Choose an answer

12%

14%

90%

95%

Amiino acids are building blocks of:

Choose an answer

Protein

Carbohydrates

Lipids

Fats

Choose an answer

There is no change in temperature

No change in volume

Heat is absorbed

Heat is released

Pick out the wrong statement. In electrochemical cell

Choose an answer

Electrons are released at anode

Cathode is regarded as negative electrode

Chemical energy is converted into electrical energy

Salt bridge maintains the electrical neutrality of the solution

Which heavy metals do not have any safe limits

Choose an answer

As

Hg

Cr

All of these

The geometry of acetylene is

Choose an answer

Angular

Bent

Trigonal

Linear

Which of the following compounds contains the highest percentage by mass of nitrogen?

Choose an answer

Ammonia, NH₃

Ammonium carbamate, NH₂CO₂NH₄

Ammonium carbonate, (NH₄)₂CO₃

Hydrazine, N₂H₄

The number of isotopes of gold is

Choose an answer

3

1

2

4

The substance which increases rate of reaction but remains unchanged at the end of reaction is called :

Choose an answer

Catalyst.

Indicator.

Promoter.

Activator.

Which species represented by the following formula has the largest radius

Choose an answer

P^3-

Cl^-

A_r

K⁺

The oxidation number of free element is always taken to be

Choose an answer

0

1

2

-1

Dipole moment of CO molecule is:

Choose an answer

0.0

1.112 D

0.112 D

2.112 D

The tip of the funnel should touch the side of the beaker in order to avoid :

Choose an answer

Splashing.

Leakage.

Mixing.

Contamination.

Maximum variable oxidation state is of:

Choose an answer

Mn⁺²

Fe⁺³

Cr⁺¹

a and b

From which of the following tertiary butyl alcohol is obtained by the action of methyl magnesium iodide?

Choose an answer

HCHO

CH₃CHO

CH₃COCH₃

CO₂

The rules which describe the distribution of electron in atomic energy levels are Auf-ban principle, Pauli's exclusion principle. Hunds rule. The pauli exclusion principle refers to the

Choose an answer

Orientation of orbital in space

Fact that two electrons in the same orbital should have opposite spins

Energy of the orbital

Spin of the electron

Macromolecules or polymers are large molecules built up from small molecules called monomers. This hypothesis put forward by

Choose an answer

Schrodixger

Standinger

Lewis

Newton

The standard e.m.f. of a galvanic cell involving cell reaction with n = 2 is found to be 0.2965 V at 25°C. The equilibrium constant of the reaction would be

Choose an answer

1.0 x 10¹⁰

2.0 x 10¹¹

4.0 x 10¹²

1.0 x 10²

Which of the following has greatest tendency to lose electron?

Choose an answer

F

Fr

S

Be

As a fixing agent in photography, sodium thisoulphate is used for

Choose an answer

Dissolving out unreacted silver bromide

Converting silver

Reducing solubility of AgBr

Preventing overdeveloping and fogging

Mustard gas is a

Choose an answer

Gas

High boiling speed

High melting liquid

Steam

The molarity of the solution containing x grams (NH₄)₂SO₄in 500 cm³of the solution is 0.6 what is x

Choose an answer

39.6

45.1

40.5

42.7

Alcohols are derivatives of:

Choose an answer

Alkanes

Alkens

Alkynes

Benzene

Alkyle magnesium halides are known as

Choose an answer

Simon-smith reagent

Tollen's reagent

Grignard's reagent

Barford's reagent

Standard reduction of Zn = -0.76 V and that of Ni is -0.25 V. On coupling them by a salt bridge which of these will act as anode

Choose an answer

Salt bridge will act as anode

Zn will act as anode

Ni will act as anode

None of these

Which of the following will affect the rate :

Choose an answer

First step of reaction.

Last step of reaction.

Rate determining step.

Fastest step.

Phenol gives ---------- Colour with neutral FeCl₃solution

Choose an answer

Violet

Green

Red

Blue

Which of the following is obtained by condensation polymerization?

Choose an answer

Polyethene

Teflon

Phenol formaldehyde resin

Nitrile rubber

Grignard's reagent on treatment with carbonyl compounds yield

Choose an answer

Pheonol

Alcohol

Alkane

None of these

Self condensation of acetaldehyde in the presence of dilute alkalies gives

Choose an answer

An acetal

An aldol

Mesitylene

Propionaldehyde

Butyric acid was named from butyrum means:

Choose an answer

Red out

Vinegar

Butter

Milk

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