Question # 1

Taste of lower alcohols is:

Choose an answer

Sweet

Bitter

Our

Salty

C₆H₁₂O₆and C₁₂H₂₂O₁₁ are:

Choose an answer

Mono-atomic molecules

Diatomic molecules

Poly-atomic molecules

Hetero atomic molecules

Substances that tend to decrease the activity of enzymes are called

Choose an answer

Coenzyme

Activators

Inhibitors

Apoenzyme

The toxic organic compounds and heavy metals and metalloids results in contamination of

Choose an answer

Surface water

Ground water

Both surface and ground water

Neither surface nor ground waters

Carbon atom holding halogen in aryl halides is

Choose an answer

sp²-hybridesed

sp³-hybridesed

sp-hybridesed

sp³d-hybridesed

Which compound is both chiral and acidic

Choose an answer

Metallic conduction is due to the

Choose an answer

Movement of electrons

Movement of ions

Both a and b

None of these

Copper oxide is dedected by borax bead test with colour:

Choose an answer

Blue

Red

Yellow

Black

Choose an answer

Treatment with HCN followed by acid hydrolysis

Oxidation of acetaldehyde followed by basic hydrolysis

Treatment with HCN followed by reduction

Treatment with HCN followed by oxidation

For what value ofK_{c almost forward reaction is complete :}

Choose an answer

K_{c =}10³⁰

K_{c =}10^-30

K_{c =}0

K_{c =}1

The degree of unsaturation in fats or oils is usually measured by numbers of grams of iodine required by 100 grmas of fat, this is called

Choose an answer

Oil number

Saturation number

Iodine number

Un saturation number

The conductivity of strong electrolyte

Choose an answer

Increases on dilution slightly

Does not change on dilution

Decreases on dilution

Depends on density of electrolyte it self

When two hydrogen atoms approach each other.

Choose an answer

Forces of attraction operate.

Forces of repulsion operate.

Forces of attraction and repulsion operate simultaneously.

Nothing happens.

The chemist who synthesized urea form ammonia cyanate was:

Choose an answer

Berzelius

Kolbe

Wohler

Lavoiser

Alkanes are generally not reactive towards acids, alkalis, oxidation or reuducing agents. They however undergo some reactions, which one is the reaction undergone by alkanes

Choose an answer

Elemination

Addition

Free radical substitution

Nucleophilic substation

What is chrome yellow?

Choose an answer

Pbo

Pb₂O

PbCrO₄

Pb₃O₄

K,Ca and Li metals may be arranged in decreasing order of their reduction potential as :

Choose an answer

Li, k, Ca

Ca, K, Li

Li, Ca, K

K, Ca, Li

For the carbylamine reaction we need hot alc.KOH and

Choose an answer

Any amin and chloroform

Chloroform and Ag powder

A primary amine and chloroform

A mono alkyl amine and trichlorom-ethane

Aldehydes give reactions :

Choose an answer

Oxidation and reduction

Base-catalysed nucleophilic

Acid catalysed nucleophilic

All of these

Which is more active ?

Choose an answer

Alkanes

Alkenes

Alkynes

Benzene

Acetic acid is manufactured by:

Choose an answer

Distillation

Fermentation

Ozonolysis

Esterification

The catalytic activity of Pt is much higher when

Choose an answer

It is mixed with asbestos

It is mixed with Pd

It is mixed with arsenic

In is made colloidal platinum

Alkynes normally have ______ hybridization

Choose an answer

Sp

Sp²

SP³

d sp³

Sintered glass is porous material used for:

Choose an answer

Absorption

Decoration

Filtration

All of above

Coal heated in the absence of air of about 500 - 1000°C is converted to

Choose an answer

Coke

Coal gas

Coal tar

All above

In sixth period 14 of its transition elements are called

Choose an answer

Lanthanides

Actinides

Radioactive elements

None

The correct order of electron affinity among the following is

Choose an answer

F > Cl > Br

Br > Cl > F

Cl > F > Br

F > Br > Cl

Ethylene combines with water in the presence of H₂SO₄+ HgSO₄and forms

Choose an answer

Ethyle chloride

Ethyle alcohol

Carboxylic acid

None of these

Which is not a bidentate ligand

Choose an answer

On passing ethane into concentrated suphuric acid the intermediate compound formed on hydrolysis with boiling water gives

Choose an answer

Methyl alcohol

Ethyl alcohol

Ethyl hydrogen sulphate

Methyl hydrogen sulphate

I-Chloropropane has two isomers, it is an example of

Choose an answer

Chain isomerism

Position isomerism

Functional group isomerism

Metamerism

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