Question # 1

Dichlorodifluoromethane, CC/2F2 has been used in aeroso propellants and as a refrigerant.
Which statement helps to explain why dichlorodifluromethane is chemically inert ?

Choose an answer

The carbon-fluorine bond energy is large

The carbon-fluorine bond has a law polarity

Fluorine is highly electronegative

Fluorine compound are non-flammable

Which one of the following is not a component of environment:

Choose an answer

biosphere

stratosphere

hydrosphere

lithosphere

Naturally occurring isotopes of silver are

Choose an answer

,Two

, Four

, Forty seven

, sixteen

d-d transition cannot be shows by

Choose an answer

Cu+1

Sc+3

Zn+2

All

The concentration of product is increasing from 30 mole/dm3 to 40mol/dm3 in 0.5 sec then rate of reaction will be------moledm-3sec-1

Choose an answer

0

20

15

25

Furan is a compound

Choose an answer

Acyclic

Alicyclic

Heterocyclic

non-aromatic

Esters have fruity smell and are used as artificial favours. Amyl acetate gives flavour of

Choose an answer

Banana

Jasmine

Pineapple

Orange

Hardness which can be removed by boiling is called

Choose an answer

Permanent hardness

Temporary hardness

Stiffness

Toughness

Which of the following molecules should be more volatile

Choose an answer

HF

HCl

HBr

HI

The long chains of amino acids are coiled around one another into a spiral by

Choose an answer

ionic bond

Van der Waal's forces

hydrogen bonding

overlapping of orbitals

A student mixed ethyl alcohol with small amount of sodium dichromate and added it to the hot solution of dilute sulphuric acid. A vigorous reaction took place. He distilled the product formed immediately. What was the product?

Choose an answer

Aceton3

Dimethyi ether

Acetic acid

Acetaldehyde

For which system does the equilibrium constant, kc has units of (concentration) ?

Choose an answer

N₂+3H_2-------2NH₃

H₂+L₂---------2HL

2NO₂----------N₂O₄

2HF--------H2+F₂

Phosphate pollution is caused by

Choose an answer

Weathering of phosphate rocks only

Agricultural fertilizers

Phosphate rocks and sewage

Sewage and agricultural fertilizers

Hydrolysis of Grignard's reagent gives:

Choose an answer

Alkane

Alkyl

Halide

Alcohol

The total number of transition elements is:

Choose an answer

10

14

40

50

The catalytic prmoter used for the industrial preparation of acetaldehyde is

Choose an answer

PdCI₂

CuCI₂

Pd + CaCI₂

None of these

Minamata disease is due to pollution of

Choose an answer

Organic waste into drinking water

Oil spill in water

Industrial waste containing mercury into fishing water

Arsenic into the atmosphere

Rutherford's model of atom failed because:

Choose an answer

The atom did o have a nucleus and electrons

It did not account fro the attraction b/w protons and neutrons

It did no account for the stability of the atom.

There is actually no space b/w the nucleus ad the electrons.

Ethyl acetate is obtained when methyl magnesium iodide reacts with

Choose an answer

Ethyl formate

Ethyl choroformate

Acetyl chloride

carbondioxide

In macromolecules DP stands for

Choose an answer

Dissociation parameter

Dissociation polymer

Degree of polymerization

None of these

Which salt is used for preserving food

Choose an answer

CaCl₂

NaCl

Na₂SO₄

BaCl₂

The total number of rare earth elements is

Choose an answer

8

32

14

10

More Classes

Other Links

Chemistry General Science Test Medium Mode 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