Question # 1

The polymers which can not be re-softened again and again are called

Choose an answer

Thermoplastic

Thermosetting

Both a and b

None

Choose an answer

+712 KJ mol^-1

+492 KJ mol^-1

-932 KJ mol^-1

-960 KJ mol^-1

If the salt bridge is not used between two half cells, then the voltage

Choose an answer

Decrease rapidly

Decrease slowly

Does not change

Drops to zero

The correct relation b/wK_{c and}K_{p is :}

Choose an answer

K_p = K_c[P/N] ^Δn

K_{c =}K_p(RT) ^Δn

K_{p =}K_c(RT) ^Δn

The carbon of a carbonyl group is:

Choose an answer

sp hybridized

sp²hybridized

sp³Hybidized

None of these

S_N1 reaction of alkylhalides leads to

Choose an answer

Retention of configuration

Recemisation

Inversion of configuration

None of these

If a salt bridge is removed between the two half cells, the voltage

Choose an answer

Drops to zero

Does not change

Increases gradually

Increases rapidly

What is the formula of asbestos?

Choose an answer

CaMg₃(SiO₃)₄

CaSiO₃

Na₂SiO₃

Mg₃H₂(SiO₃)₄

Which of the following fluorides does not exists?

Choose an answer

NF₅

PF₅

AsF₅

SbF₅

Cyanoform is ________ acid in nature than the chloroform. The missing word is

Choose an answer

Stronger

Weaker

Amphoteric

Neutral

The substance added in the paints for improving the mechanical properties is called

Choose an answer

Pigment

Filter

Stabilizer

Binder

Ca, Mg, Be, Ba, belong to the same group, the order of their ionization energy values is

Choose an answer

Be > Mg> Ca > Ba

Ba > Ca > Mg > Be

Ca > Mg > Be > Ba

Ba > Mg > Ca > Be

The hydrocarbon used for polymerization is

Choose an answer

Alkanes

Alkenes

Alkynes

All of above

A carbon atom carrying a postitive charge and attached to three other atoms of groups is called

Choose an answer

Caronium ion

Carbanion

Oconium ion

Carba ion

Alkyl halides on treatment with metallic Na give

Choose an answer

Alkynes

Alkenes

Alkanes

Alcohols

Which one of the following is a product of the reaction between C₆H₅CH₂OH and CH₃COCI

Choose an answer

C₆H₅OCOCH₃

C₆H₅CH₂CI

C₆H₅CH₂OCOCH₃

C₆H₅CH₂COCI

Which of the following gives iodoform on heating with a solution of I₂containing Na₂CO₃?

Choose an answer

Ethyl alcohol

Acetone

Ethyl alcohol as well as acetone

Methyl alcohol

Metal tend to lose electrons, becoming:

Choose an answer

Metals

Positively charged

Negatively charged

(a)And (c)

In which of the following reactions is the inorganic reagent acting as a nucleophile

Choose an answer

The benzene molecule contains

Choose an answer

Three double bonds

Two double bonds

One double bonds

Delocalizedπ-electron charge

Which one of the following is not an alkali metal

Choose an answer

Francium

Caesium

Rubidium

Radium

When copper is allowed to react with HNO₃, the reaction is slow in the beginning, finally becomes very fast. It is due to the formation of an auto catalyst which is

Choose an answer

Cu(NO₃)₂

CuO

O₂

HNO₂

The formula of lime stone is

Choose an answer

CaCl₂

MgCO₃

Na₂CO₃

CaCO₃

Linear shape is associated with which set of hybrid orbitals

Choose an answer

sp

sp²

sp³

dsp²

When electrons revolve in stationary orbits

Choose an answer

There is no change in energy level

They vecome stationary

They are gaining kinetic energy

There is increase in energy

Which of the following is not fatty acid?

Choose an answer

Propanoic acid

Acetic acid

Phthalic acid

Butanoic acid

Enthalpy of neutralization of all the strong acids and strong bases has the same value because

Choose an answer

Neutralization leads to the formation of salt and water

Strong acids and bases are ionic substances

Acid always give rise to H⁺ions and bases always furnish OH^-ions

The net chemical change involve the combination of H⁺and OH^-ions to form water

In sp²hybridization bond angle is _____

Choose an answer

120°

180°

109.5°

None

The energy of the system and surrounding is conserved. This is a statement of

Choose an answer

Law of mass action

Law of definite proportion

Law of conservation of energy

Second law of thermodynamics

Carboxylic acids on complete reduction in the presence of Hi and red phosphorus gives:

Choose an answer

Esters

Alcohols

Alkanes

Aldehydes

Amides on treatment with Br₂and KOH are converted into amines, the reaction is known as

Choose an answer

Hoffmann's bromamide reaction

Hoffmann's methylation

Gabriel phthalimide reaction

H.V.Z reaction

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