Question # 1

Saturated solution of NaCl on heating becomes

Choose an answer

Super saturated

Unsaturated

Remains saturated

None

Alkali metals react violently with halogens to form

Choose an answer

Hydrides

Halides

Anyhydrides

None of these

The solubility product of AgCl is 2.0 x 10^-10mole ²dm^-6. The maximum concentration of Ag⁺ions in the solution is

Choose an answer

2.0 x 10^-10mole dm^-3

1.41 x 10^-5mole dm^-3

1.0 x 10^-10

4.0 x 10^-20mole dm^-3

The oxides of which of the following elements will be acidic in character

Choose an answer

Mg

Rb

Li

Cl

What mass of NaOH is required to prepare 2.5 dm³of 1.5 M NaOH solution

Choose an answer

130 g

140 g

150 g

160 g

The example of a photo chemical reaction is photosynthesis has order of reaction :

Choose an answer

1

2

0

3

The other name for distribution law is

Choose an answer

Dispersive law

Partition law

Avogadro's law

separation law

S-block elements consist of

Choose an answer

Alkali metals

Alkaline earth metals

Alkali and alkaline earth metals

None of these

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

Which of the following statements is not true?

Choose an answer

Isotopes with even atomic masses are comparatively abundant

Isotopes with even atomic masses and even atomic numbers are comparatively abundant

Isotopes with even atomic masses and odd atomic number are comparatively abundant

The carbon atom of a carbonyl group is

Choose an answer

Sp hybridized

Sp²hybridized

Sp³hybridized

None of these

Which reaction sequence would be best to prepare 3-chloro-aniline from benzene?

Choose an answer

Chlorination, nitration, reducing

Nitration, chlorination, reducition

Nitration, reduction,chlorination

Nitration, reduction, acylation, chlorination, hydrolysis

Polythene is a polymer of

Choose an answer

Ethane

Ethene

Acetone

Propylene

Amino acids are buildng blocks of:

Choose an answer

protein

Carbohydrates

Lipids

fats

Vital force theory was rejected by

Choose an answer

Berzellius

Kolbe

Wholer

Lavoiser

Silicon atom is hybridized:

Choose an answer

sp

sp²

sp³

dsp²

In CCL4 solvent I3 shows:

Choose an answer

Blue Color

Brown Color

Purple Color

Pink Color

An alkynes having Carbon count of 20 is

Choose an answer

gas

liquid

Solid

None

Amiino acids are building blocks of:

Choose an answer

Protein

Carbohydrates

Lipids

Fats

Which element should have the greatest value for electronegativity when combined with hydrogen

Choose an answer

Na

Si

S

Cl

Which of the following statement about fluorine is not correct?

Choose an answer

Electron affinity of chlorine is greater than that of fluorine

Bond energy of fluorine is less than that of chlorine

Fluorine cannot be prepared by electrolysis of fused metal fluorides

Fluorine does not form oxoacid

Which of the following elements is most electronegative?

Choose an answer

Oxygen

Chlorine

Nitrogen

Fluorine

Which is a mixture of low boiling hydrocarbon

Choose an answer

Natural gas

Petroleum

Wood

Graphite

Which are used as essences (flowers)?

Choose an answer

Aldehydes

Ketones

Alcohols

Esters

Which of the following enzymes brings about the hydrolysis of fats?

Choose an answer

Urease

Maltase

Zymase

Lypase

Dehydrohalogenation of alkyl halides produces

Choose an answer

Alcohol

Alkane

Alkene

Alkyne

The hydrocarbon used for polymerization is

Choose an answer

Alkanes

Alkenes

Alkynes

All of above

Choose an answer

Three times

Six times

Nine times

Two times

When ammonia is heated with cupric oxide, a molecule of ammonia will

Choose an answer

Gain 3 electrons

Lose 3 electrons

Gain 2 electrons

Lose 2 electrons

Series starting form ₃₉Y to ₄₈CD is in period:

Choose an answer

4th

5th

6th

7th

The wave number of light emitted by a certain source is 2 x 10⁵m. The wavelength of this light will be:

Choose an answer

500 NM.

500 M.

200 NM.

5 x 10⁷m

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