Question # 1

The base used in Cannizzaro's reaction is

Choose an answer

NaOH

KOH

CHI₃

All of these

When two hydrogen atoms approach to form a chemical bond

Choose an answer

The repulsive forces dominate the attractive forces

The attractive forces, dominate the repulsive forces

The energy of atoms increases

The two atoms start ionization

50 cm³of 0.05 molar nrea (N₂H₄CO) solution has % W/N concentration

Choose an answer

6%

3%

0.3 %

0.6 %

Enzymes catalyse all biological reactions occurring in the cell. What is true about an enzyme

Choose an answer

Enzyme is a small molecule

Enzyme is acidic in nature

Enzyme is a protein

Enzyme is a lipid

The atom other than C in a hetrocyclic compound is called as

Choose an answer

Hetroatom

Hetroion

Hetromolecule

Hetroelement

Generally ionization energy of atoms decreases by

Choose an answer

Decreases in atomic size

Increase in atomic size

Increase in nuclear charge

None of these

Solvent extraction is an unstable,Process and it is controlled by:

Choose an answer

Alcohol extraction

Petrol extraction

Phenol extraction

Ether extraction

The catalyst,. which is used as specialist for cracking, are

Choose an answer

Aluminates

Alumlnosilicates

Aluminium slats

All can be used

What is the name of the comlex [Ni(CO)₄]

Choose an answer

Tetracarbonylnickel (o)

Tetracabonylnickel

Tetracabonylnickel (II)

Tetracabonylnickel (IV)

The next homologue of C₁₀H₂₂will be

Choose an answer

C₉H₂₀

C₁₂H₂₆

C₁₁H₂₄

C₁₃H₂₈

Choose an answer

Aqueous bromine

Dilute HNO₃

Dilute HCI

CH₃COCI

The self linking of carbon atoms is called

Choose an answer

Chelation

Isomerism

Catenation

None of the above

Glacial acetic acid freezes to ice like solid at (°C)

Choose an answer

07

17

27

37

Hydrolysis of alkyl nitriles is done to get carboxylic acids in the presence of

Choose an answer

Mineral acids

Mineral alkalies

Organics acids

Minerals acids & alkalies

The distillation of coal at high temperature and in absence of air is called

Choose an answer

Vacuum distillation

Normal distillation

Fractional distillation

Destructive distillation

Energy of electron in first orbit of H atom is

Choose an answer

-45.32 KJ/mole

-82.08 KJ/mole

-52.53 KJ/mole

-1313.31 KJ/mole

The term aromatic was derives from

Choose an answer

Greek word

Latin

Russian

English

Coligative properties are the properties of

Choose an answer

Dilute solution which behave as nearly ideal solutions

Concentrated solutions which behave as nearly non-ideal solution

Both (i) and (ii)

Neither (i) and (ii)

Gypsum is a common mineral of

Choose an answer

Magnesium

Strontium

Calcium

Barium

Group VIB of transition elements contains

Choose an answer

Zn, Cd, Hg

Fe, Ru, Os

Cr, Mo, W

Mn, Te, Re

Chromium (VI) is highly toxic and can cause

Choose an answer

Blindness

Cancer

Liver problems

Blood problems

The number of atoms present in molecule determines its:

Choose an answer

Molecularity

Atomicity

Basicity

Acidity

In purification of potable water the coagulant used is

Choose an answer

Nickle sulpahte

Copper sulpahte

Barium sulpahte

Alum

Which of the following is obtained by condensation polymerization?

Choose an answer

Polyethene

Teflon

Phenol formaldehyde resin

Nitrile rubber

Without proper suction,filtration is:

Choose an answer

Rapid process

Fague process

Slow process

Useless process

The active part in a molecule is called

Choose an answer

Homologous series

Functional group

Chemical bonding

Ionic complex

During the preparation of alkanes the hydrogenation of alkenes or alkynes the catalyst may be

Choose an answer

H₂SO₄

Ni

Fe₂O₃

Al₂O₃

Alkyne is :

Choose an answer

CH_3-CH₃

CH₄

CH₂₌CH₂

C₂H₂

Teflon, styron and neoprene are all

Choose an answer

Copolymers

Condensation polymers

Homopolymers

Monomers

The positive ion is always smaller than the neutral atom while the negative ion is always bigger than the neutral atom. The atomic and ionic radii of Na, F, Na⁺, F^-are in ppm

Choose an answer

Na F Na⁺ F^-

157 72 95 136

Na F Na⁺ F^-

157 95 172 136

Na F Na⁺ F^-

72 95 136 157

Na F Na⁺ F^-

157 136 95 72

Choose an answer

Reaction occurs at STP

Reaction is exothermic

Reaction is endothermic

Number of moles of production and reactant are same

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