Question # 1

The total number of orbitals possible for the quantum number n is

Choose an answer

n

n²

2n

2n²

If four moles of sulpur dioxide are oxidised to sulphur trioxide, how many moles of oxygen molecules are required

Choose an answer

0.5

1.0

1.5

2.0

Which of the following species has unpaired electrons in ant-bonding molecular orbitals?

Choose an answer

O2⁺²

N2^-2

B₂

F₂

Which of the following expressions show a heterolytic bond fission

Choose an answer

When a carbon atom forms single bonds with other carbon atoms, these hybrid orbitals overlap with the orbitals of hydrogen to form four bonds which are

Choose an answer

Three sigma and one P_i

Two sigma and two P_i

One sigma and three P_i

sigma

The compound which gives oxygen on moderate heating is

Choose an answer

Zinc oxide

Mercuric oxide

Aluminium oxide

Ferric oxide

f-Block elements are also called

Choose an answer

Non typical transition elements

Outer transition elements

Normal transition elements

Inner transition elements

Choose an answer

Total pressure

Amount of A₂and B₂

Temperature

Catalyst

Compounds of carbon and hydrogen in which the tetra valency of carbon is fully satisfied are called,

Choose an answer

Saturated

Un-saturated

Magnetic

Para-magnetic

Corrosion of iron can be prevented by coating the surface with

Choose an answer

Zn

Sn

Ni

Any of the above

The electron in an atom

Choose an answer

moves randomly around the nucleus

has fixed space around the nucleus

is stationary in various energy levels

moves around its nucleus in definite energy levels

Iron, once dipped in concentrated H₂SO₄, does not displace copper from copper sulphates solution, because

Choose an answer

It less reactive than copper

A layer of sulphates is deposited on it

An inert layer of iron oxide is deposited on it

All valence electrons of iron are consumed

The cathodic reaction in the electrolysis of dill H₂SO₄with Pt electrodes

Choose an answer

Reduction

Oxidation

Both oxidation and reduction

neither oxidation or reduction

The cell in which a non-spontaneous redox reaction takes place as a result electricity is known as :

Choose an answer

Electrolytic cell.

Voltaic cell.

Daniel cell.

Dry cell.

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

Normal by product of cracking is

Choose an answer

Ethane

Butane

Benzene

All of them

A single benzene ring can have ______ ortho position maximally

Choose an answer

One

Two

Three

Four

Acetamide is prepared by:

Choose an answer

Heating ammonium acetate

Heating methyl cyanide

Heating ethyl acetate

The hydrolysis of methyl cyanide

Alkynes normally have ______ hybridization

Choose an answer

Sp

Sp²

SP³

d sp³

X-ray work has shown that the diameters of atom are of the order of

Choose an answer

8 x 10^-10m

2 x 10^-10m

8 x 10^-8m

2 x 10^-8m

Which of the following method is most appropriate for the manufacture of methane?

Choose an answer

By reduction of CH2CL2

Wurtz reaction

Liquification of natural gas

None of these

Vinyl acetylene combines with HCl to form:

Choose an answer

Polyacetylene

Benzene

Chloroprene

Divinyl acetylene

Light emitted from a source has its wave length 500nm, then its wave number will be

Choose an answer

2 x 10⁶m^-1

2 x 10⁷m^-1

5 x 10⁸m^-1

5 x 10⁹m^-1

Potable water is considered to be

Choose an answer

Safe for human consumption

Not safe for human consumption

The surface water

The ground water

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

Primary alcohols and aldehydes are oxidized to corresponding:

Choose an answer

alkanes

alkenes

Alkynes

Carboxylic Acid

When a weak acid is dissolved in water or a weak base dissolved in water, then in both cases the conjugate acid base pair is produced. The ionization constants K_aand K_bof a pair are related with each other as

Choose an answer

K_a= K_b

K_a. K_b= K_w

K_a. K_w= K_b

K_b. K_w= K_a

Which has the largest radius?

Choose an answer

CO³⁺

Mn³⁺

Fe³⁺

Cr³⁺

Products of coal is:

Choose an answer

Peat

Lignite

Bituminous coal

All above

Which of the following d-block elements can show the highest oxidation number in its compounds

Choose an answer

Chromium

Copper

Nickel

Manganese

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

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