Question # 1

The normal amount of overhead ozone is about

Choose an answer

250 Du

300 DU

350 DU

400 DU

Drained sewage has B.O.D

Choose an answer

More than that of water

Less than that of water

Equal to that of water

None of the above

The optimum conditions of temperature and pressure to get maximum NH₃form N₂and H₂gases is

Choose an answer

2000°C and 10 atmosphere

0°C and 1 atmosphere

400°C and 200-300 atmosphere

200°C and 100 atmosphere

Grignard's reagent on treatment with chloramine give

Choose an answer

Acetamide

Primary amice

Secondary amice

Urea

Introduction of a second methyl group in methylbenzene will give how many isomeric dimethyllenzenes

Choose an answer

2

1

3

4

Pure water does not conduct electricity because it

Choose an answer

Has low boiling point

Is almost unionized

Is neutral

Is readily decomposed

An electrochemical cell is based upon

Choose an answer

Acid-base reaction

Redox reaction

Nuclear reaction

None of the above

The atomic number of an element is 35 what is the total number of electrons present in all the p-orbitals of the ground state atom of that element?

Choose an answer

6

11

17

23

Which one of these is weakest?

Choose an answer

Ionest bond

Covalent bond

Metallic bond

Van der Waal's forces

Which of the following is a transition element

Choose an answer

Sr

Sn

Cr

Pb

Ethyl bromide is formed by the reaction of HBr with

Choose an answer

Ethane

Ethene

Ethyne

Propane

The next homologue of C₁₀H₂₂will be

Choose an answer

C₉H₂₀

C₁₂H₂₆

C₁₁H₂₄

C₁₃H₂₈

The increase in size of the anion is due to:

Choose an answer

Increase in electron-electron repulsion

Increase in valence shell electrons.

Decrease in valence shell electrons.

Both (a) and (b).

Steel may be manufacture by two processes which two are correct

Choose an answer

Open hearth process and besemer process

Open hearth process and Haber process

Bassemer process and Haber process

Contact process and Haber process

A complete chemical Characterization of a compound must include:

Choose an answer

Qualitative analysis

Chemical analysis

Quantitative analysis

None of above

The sum of the exponents of the conc. terms in the rate equation is called

Choose an answer

Rate of reaction

Order of reaction

Specific rate constant

Average rate

It rate law of an equation is written asdx/dt=K[A][B] ?

Choose an answer

Reaction is independent of the concentration of A and B.

Product is decreasing with passage of time.

Reactant in increasing with passage of time.

Reactant is increasing with passage of time.

Cracking done at low pressure and with a catalyst is called _______ cracking

Choose an answer

Thermal

Catalytic

Steam

None of them

A cell constant is generally found by measuring the conductivity of aqueous solution of

Choose an answer

BaCl₂

KCl

NaCl

MgCl₂

The order of reactivity of an alkyl halide (R-X) for a particular alkyl group is

Choose an answer

Iodide > bromide > chloride

Chloride > bromide > iodide

Bromide > chloride > iodide

Bromide > iodide > chloride

A polymeric substance that is formed in the liquid state and then hardened to a rigid solid is called a:

Choose an answer

Fiber

Plastic

Vanish

Polyamide resin

Which of the following compounds on oxidation gives benzoic acid?

Choose an answer

Chlorophenol

Chlorotoluene

Chlorobenzene

Benzyl chloride

Coordination number of Pt in [Pt Cl(NO₂) (NH₃)]^2-is

Choose an answer

2-

4

1

6

What is the molarity of a solution containing 15.0 g urea in 500 cm³of solution

Choose an answer

0.5 M

1 M

1.5 M

2 M

Which one of the following has discontinuous solubility curve

Choose an answer

CaCI₂6H₂O

NaCI

KCI

NaNO₃

A pseudo uni-molecular reaction has order of reaction :

Choose an answer

3

2

1

0

Acetic acid is obtained when

Choose an answer

Methyl alcohol is oxidized with potassium permanganate

Calcium acetate is distilled in the presence of calcium formate

Acetaldehyde is oxidized with potassium dichromate and sulphuric acid

Glycerol is heated with sulphuric acid

According to Raoult's law

Choose an answer

Relative lowering of V.P. is equal to mole fraction of solute

The lowering of V.P. is directly proportional to mole fraction of solute

V.P. of solvent above solution is equal to product of V.P. of pure solvent and mole fraction of solvent ins solution

All of the above

By applying Hess's law, we can calculate

Choose an answer

ΔH

ΔS

ΔF

K

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.

The solubility product of Ca(OH)₂is 6.5 x 10^-6. The concentration of OH^-ions is

Choose an answer

1.175 x 10^-2

2.35 x 10^-2

3.25 x 10^-3

3.25 x 10^-4

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