Question # 1

Phenol is used in the preparation of

Choose an answer

Bakelite

Phenatherene

Cellulose

All of these

Methyl alcohol is not used:

Choose an answer

As a solvent

As an anti-freezing agent

As a subsitution for petrol

For denating of ethyle alcohal

Units of Kw are

Choose an answer

Mole dm^-3

Mole²dm^-3

Mole²dm^-6

Mole²dm^-3

Proteins and amino acid can be separated by:

Choose an answer

Filtration

^Sublimation

Chromatography

Suction

In which of the following theories the hybridizationis considered

Choose an answer

Vsepr

Lewis

Molecule orbital

Valence bond

As the nuclear charge increases, the pull on the electrons is increased and size of an atom:

Choose an answer

Decreases.

Remain same.

Increases.

Is negligible.

The equation for the first ionization energy of hydrogen is

Choose an answer

The rate of reaction is denoted by

Choose an answer

dc/dp

dc/ac

dc/dT

dc/dt

Who gave the concept of atomic number

Choose an answer

Newton

Mosley

Dalton

Newland

Biodegradable pollutant is

Choose an answer

Plastic

Asbestos

Sewage

Mercury

Which of the following compounds on boiling with KMnO₄(alk) and subsequent acidification will not give benzoic acid?

Choose an answer

Benzyl alcohol

Acetophenone

Anisole

Toluene

Sodium forms largely

Choose an answer

Normal oxides

Per-oxides

Superoxides

None of these

What happens when reaction is at equilibrium and more reactant is added :

Choose an answer

Forward reaction rate is increased.

Forward reaction rate is decreased.

Backward reaction rate is increased.

Equilibrium remains unchanged.

To get DDT, chlorobenzene has to react with one of the following compound in the presence of conc.H₂SO₄

Choose an answer

Trichloroethane

Dichloroacetone

Dichloroacetaldehyde

Trichloroacetealdehyde

For which one of the following pairs of compounds can the members be distinguished by means of Tollen's test

Choose an answer

HCHO and CH₃CHO

CH₃CHO and CH₃COCH

CH₃COCH₃and C₆H₅COCH₃

CH₃COOH and CH₃COOCH₃

Which of the hydrogen halides has the highest percentage of character?

Choose an answer

HCl

HBr

HF

Hl

Which of the following elements is not stable:

Choose an answer

Xe

Ar.

Kr.

Li.

The homologous series of aldehydes and ketones have general formula:

Choose an answer

C_nH_2nO

C_nH_nO

C_nH_2n-1O

C_nH_nO_n

Electrochemical series is a list of element S arranged into the increasing order of their

Choose an answer

Standard oxidation potential

Standard reduction potential

Cell voltage

Ionization potential

The final product formed by distilling ethyl alcohol with excess of Cl₂and Ca(OH)₂is

Choose an answer

CH₃CHO

CCl₃CHO

CHCl₃

(CH₃)₂O

The valence shell of hydrogen is half filled like those of

Choose an answer

IV - A

VIA

V - A

VIIA

Electron affinity of sulphur is

Choose an answer

More than O and Se

More than O but less than Se

Less than O but more than Se

Equal to O and Se

In endothermic reactions, the heat content of the

Choose an answer

Products is more than that of reactants

Reactants is more than that of products

Both a and b

None of the above

In public urinals, we observe some nascent smell. This smell is due to

Choose an answer

Hydrolysis of urea of urine by urease of atmosphere into NH₃and CO₂

Formation of sulphonic acid by urea of urine

Reaction of CO₂of atmosphere with urea monoitrate in urine

Hydrogen present in air reacts with nitrogen forming NH₃

For which system does the equilibrium constant. K_chas units of

Choose an answer

Oxalic acid oxidizes to:

Choose an answer

CO

CO₂

Oxalates

None of these

The number of electron that are paired in oxygen molecule are

Choose an answer

16

12

14

7

Heat absorbed or released during the chemical reaction of physical process at constant pressure is equal to

Choose an answer

Na reacts with phenol to produce

Choose an answer

H₂gas

Benzene

CO₂gas

CO gas

In the earth crust sodium is

Choose an answer

2.50%

2.30%

2.40%

3.50%

Which of the following is the use of electrolysis?

Choose an answer

Eletrorefining

Electroplating

Both A and B

None of the above

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