Question # 1

A free radical reaction takes place in three steps, initiation, propagation and terminations. Which of the following expression represents a propagation step

Choose an answer

The heat energy change during a chemical reaction at constant pressure and at a given temperature is called

Choose an answer

Change in internal energy

Enthaply change

Temperature change

Work done by the system

Spontaneous reaction is such in which the system decreases its ______

Choose an answer

Energy

Free energy

Entropy

All

A bond between two atoms may be obtained by sharing of electrons such a bond is called

Choose an answer

An ionic bond

A coordinate bond

A dative bond

A covalent bond

In an electrolytic cell, the electrons flow from :

Choose an answer

Cathode to anode or opposite

Cathode to anode

Anode to cathode

Random flow

At certain temperature, 50% of HI is dissociated into H₂and I₂the equilibrium constant is

Choose an answer

1.0

3.0

0.5

0.25

denaturing of alcohol is done by adding methanol in ethanol:

Choose an answer

10%

20%

30%

40%

Cannizzzaro's reaction is not given by:

Choose an answer

Formaldehyde

Acetaldehyde

Benzaldehyde

Trimethyl

A limiting reactant is the one which

Choose an answer

Is taken in lesser quantity in grams as compared to other reactants

Is taken in lesser quantity in volume as compared to other reactants

Gives the maximum amount of the product which is required

Gives the minimum amount of the product under consideration

Which of the following is a nucleophile

Choose an answer

OH

CH(CH₃)₃

CH₃⁺

CH₃CH₂CH₃

Aldehydes can be distinguished from ketones by

Choose an answer

2,4-DNPH test

NaHSO₃test

N₂H₄test

Tollen's test

How does the ionization energy of 1st group elements vary?

Choose an answer

Increases down the group

Decreases down the group

Remains unchanged

Variation is not regular

Calcium carbide reacts with water to produce

Choose an answer

Acetylene

Methane

Ethylene

Ethane

Benzene hexachloride is used as

Choose an answer

Dye

Antimaterial drug

Antibiotic

Insecticide

An organic compound 'X' on treatment with acidified K₂Cr₂O₇gives a compound 'Y' which reacts with I₂and sodium carbonate to form Triodomethane. The compound 'X' is

Choose an answer

CH₃OH

CH₃CHO

CH₃CH(OH)CH₃

CH₃COCH₃

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

Choose an answer

Stronger

Weaker

Amphoteric

Neutral

f-Block elements are also called

Choose an answer

Non typical transition elements

Outer transition elements

Normal transition elements

Inner transition elements

In primary alkyl halides, the halogen atom is attached to a carbon which attached to how many carbon atoms?

Choose an answer

Two

Three

One

Four

There are 20 amino acids found in protein which is not the property of these amino acids

Choose an answer

They are allα-amino acids

They are all optically active

They have high decomposition point

They are water soluble

Most transition elements show

Choose an answer

Diamagnetic behavior

Ferromagnetic behavior

Paramagnetic behavior

None of these

Alkyl halides on treatment with metallic Na give

Choose an answer

Alkynes

Alkenes

Alkanes

Alcohols

Which is used for the reduction of aldehydes and ketones

Choose an answer

NaBH₄

Pt/Pd

Ni

All of these

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

Choose an answer

di(4-bormophenyl) method

Methanol

Propan-1-ol

Propan-2-ol

In a primary alkyl halide, the halogen atom is attached to a carbon which is further attached to

Choose an answer

Only one carbon atom

Two carbon atoms

Three carbon atoms

one or no carbon atom

In 1000 molecules of 0.001 M acetic acid the number of H⁺ions is 12.6, then its percentage of ionization is

Choose an answer

1.33%

1.26%

12.6

1%

Choose an answer

Zero

1

2

1.5

Grignard's reagent on treatment with dry CO₂and HCI yields

Choose an answer

Ester

Alcohol

Carboxylic acid

Aldehyde

The method involved for electrolysis of Na or K salts of carboxylic acids

Choose an answer

Sabatier's sendrens reaction

Kolbe's method

Clemmensen

Wolf kishner reduction

The film forming components of paints are

Choose an answer

Resins

Thinners

Pigments

Driers

A reaction in which an atom or a group of atoms replaces an atom or a group of atoms in the molecule of a substance is known as

Choose an answer

Addition reaction

Condensation reaction

Elimination reaction

Substitution 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