DEMOEXAM | ScoreExams

Question 1 of 10

Identify the incorrect statement from the following:

AOzone absorbs the intense ultraviolet radiation of the sun.

BDepletion of ozone layer is because of its chemical reactions with chlorofluoro alkanes.

COzone absorbs infrared radiation.

DOxides of nitrogen in the atmosphere can cause the depletion of ozone layer.

Question 2 of 10

In Young's double slit experiment, the width of one of the slits is slowly increased to make it twice the width of the other slit. Then in the interference pattern:

Athe intensity of maxima increase while that of minima decrease

Bintensities of both maxima and minima decrease

Cthe intensities of both maxima and minima remain the same

Dthe intensities of both maxima and minima increase

Question 3 of 10

Chloroform gives a trichloro derivative of an alcohol on reaction with

Aconc. nitric acid

Baq. alkali

Cacetone and alkali

Dsodium ethoxide

Ea primary amine and an alkali

Question 4 of 10

If x₁, x₂, x₃ as well as y₁, y₂, y₃ are in GP with the same common ratio, then the points (x₁, y₁), (x₂, y₂) and (x₃, y₃) :

Alie on a parabola

Blie on an ellipse

Clie on a circle

Dlie on a straight line

Question 5 of 10

An organic compound A(C₄H₉Cl) on reaction with Na/diethyl ether gives a hydrocarbon which on monochlorination gives only one chloro derivative. A is

At-butyl chloride

Bs-butyl chloride

Cisobutyl chloride

Dn-butyl chloride

Enone of these

Question 6 of 10

When 32.25g of ethyl chloride is subjected to dehydrohalogenation reaction the yield of the alkene formed is 50%. The mass of the product formed is: (atomic mass of chlorine is 35.5)

A14g

B28g

C64.5g

D56g

E7g

Question 7 of 10

then the matrix A is equal to

A

B

C

D

E

Question 8 of 10

The rate of a First order reaction 0.04 {tex}mol^{-1} S^{-1}{/tex} at 10 seconds 0.03 {tex}mol^{-1} s^{-1}{/tex} at 20 seconds after intiation of reaction. The half life period of the reaction is

A24.1s

B34.1s

C44.1s

D54.1s

Question 9 of 10

Given the polymers ; A = Nylon ; B = Buna - S;C = Polythene. Arrange these in increasing order of their intermolecular force (lower to higher)

AA > B > C

BB > C > A

CB < C < A

DC < A < B

Question 10 of 10

Basic properties of {tex}TiO_2, ZrO_2{/tex} and {tex}HfO_2{/tex} are in the order:

A{tex}TiO_2 < ZrO_2 < HfO_2{/tex}

B{tex}ZrO_2 < HfO_2 < TiO_2{/tex}

C{tex}HfO_2 < TiO_2 < ZrO_2{/tex}

D{tex}TiO_2 < HfO_2 < ZrO_2{/tex}