Question # 1

Alkyl halides react with Mg in dry ether to form

Choose an answer

Magnesium halide

Grignard's reagent

Alkene

Alkyne

Alkyl benzenes are readily oxidized by axidfied

Choose an answer

KMnO₄

K₂CO₃

MnO₄

H₂SO₄

A certain current liberate 0.5 g of hydrogen in 2 h. How many grams of copper can be liberated by the same time in a copper sulphate solution?

Choose an answer

12.7 gm

15.9 gm

31.8 gm

63.5 gm

The covalent bonds are

Choose an answer

Unidirectional

Bi-directional

Non-directional

Multi-directional

The amount of oxygen in the lithosphere is about

Choose an answer

35.50%

40.60%

56.60%

50.50%

The percentage of which element in the organic compound is determined by the difference method

Choose an answer

Carbon

Hydrogen

Nitrogen

Oxygen

A peptide having molecular mass upto 10,000 is called a

Choose an answer

Vitamin

Protein

Polypeptide

Dipetide

A solution can be

Choose an answer

Dilute and concentrated

Saturated and dilute

Saturated and unsaturated

Supersaturated and saturated

Soil remediation means

Choose an answer

To make it suitable for cultivation of crops

To make it acidic

To make it alkeline

To add manure into it

When metallic sodium in ether is heated with ethyl chloride, which alkane is formed

Choose an answer

Propane

Ethane

Iso-butane

N-butane

Bell metal is an alloy of Sn and

Choose an answer

Copper

Iron

Zinc

Magnesium

The clotting time of blood is increased due to the deficiency of

Choose an answer

Vitamin A

Vitamin K

Vitamin D

Vitamin C

The carbon of a carbonyl group is:

Choose an answer

sp hybridized

sp²hybridized

sp³Hybidized

None of these

A pair of elements in the same family in the periodic classification is

Choose an answer

Cl and C

Ca and Al

N and Ne

Na and K

Primary alcohols and aldehydes are oxidized to corresponding:

Choose an answer

alkanes

alkenes

Alkynes

Carboxylic Acid

Alkaline earth metals are usually

Choose an answer

Reducing agent

Oxidizing agent

Amphoteric

Acidic

Which of the following is not isoelectronic?

Choose an answer

Na⁺

Mg²⁺

O^2-

Cl^-

Which of the following is not an ortho-para directing group

Choose an answer

In which of the following cases, the reaction goes farthest to completion

Choose an answer

K = 10³

K = 10^-2

K = 10

K = 10⁰

A carboxylic acid contains:

Choose an answer

A hydroxyl group

A carboxyl group

A hydroxyle & carboxyl group

A carboxyl &aldehyde group

Which one of the following compounds does not have the empirical formula CH₂O?

Choose an answer

Ethanoic acid, CH₃CO₂H

Ethanol, CH₃CH₂OH

Glucose, C₆H₁₂O₆

Methanal, HCHO

Chemical composition of colemnite is:

Choose an answer

Ca₂B₆O₁₁.5H₂O

CaB₄O₇ .4 H₂O

Na₂B₇O₇. 4 H₂O

CaNaB₅O₉.8H₂O

______ gives peroxide

Choose an answer

Li

Ba

Sr

Be

Which of the following has zero depole-moment?

Choose an answer

CIF

PCl₃

SiF₄

CFCl₄

The pH of 10^-3mole dm^-3of an aqueous solution of H₂SO₄is

Choose an answer

3.0

2.7

2.0

1.5

Acyl halide is formed by reacting PCl₅with

Choose an answer

Alcohol

Ester

Amide

Both carboxylic acids as well as esters

What is the volume in cm³of 3.01 x 10²³molecules of O₂gas at S.T.P

Choose an answer

1000 cm³

11000 cm³

1120 cm³

11200 cm³

1.0 g pure calcium carbonate was found to require 50 ml of dilute HCl for complete reaction. The strength of HCl solution is given by

Choose an answer

4 N

2 N

0.4 N

0.2 N

Carboxylic acids are more acidic than pehnol and alcohol because of

Choose an answer

Intermolecular hydrogen bonding

Formation of dimmers

Highly acidic hydrogen

Resonance stabilization of their conjugate base

Choose an answer

During oxidation in k₂Cr₂O_{7, Cr VI changes to :}

Choose an answer

I

II

III

IV

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