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

According to MO theory, which of the following ranks the nitrogen species in terms of increasing bond order?

A{tex}N^{2-}_{2} < N^{-}_{2} < N_2{/tex}

B{tex}N_2 < N^{2-}_{2} < N^{-}_{2}{/tex}

C{tex}N^{-}_{2} < N^{2-}_{2} < N^{-}_{2}{/tex}

D{tex}N^{-}_{2} < N_2 < N^{2-}_{2}{/tex}

Question 3 of 10

The angle of minimum deviation in an equilateral prism of refractive index 1.414 is

A60°

B30°

C90°

D45°

E15°

Question 4 of 10

The oxidation state of the most electronegative element in the products of the reaction between {tex}BaO_2{/tex} and {tex}H_2SO_4{/tex} are:

A0 and 1

B-1 and -2

C-2 and 0

D-2 and +1

Question 5 of 10

∫e^{3 log x} (x⁴+1)^-1 dx is equal to

Ae^{3 log x} + c

B1/4 log(x⁴+1)+c

Clog(x⁴+1)+c

D1/2 log(x⁴+1)+c

Ex⁴/(x⁴+1) + c

Question 6 of 10

Sulphur trioxide can be obtained by which of the following reaction.

A{tex}CaSO_4 + C x\rightarrow{\Delta}{/tex}

B{tex}Fe_2 (SO_4)_3 + C x\rightarrow{\Delta}{/tex}

C{tex}S + H_2 SO_4 x\rightarrow{\Delta}{/tex}

D{tex}H_2 SO_4 + PCl_5 x\rightarrow{\Delta}{/tex}

Question 7 of 10

Which substance serves as a reducing agent in the following reaction, {tex}14H^{+} + Cr_2O^{2-}_7 + 3Ni \rightarrow 2Cr^{3+} + 7H_2O + 3Ni^{2+}{/tex}

A{tex}H_2O{/tex} and alcohol

BNi

C{tex}H^{+}{/tex}

D{tex}Cr_2O^{2-}_{7}{/tex}

Question 8 of 10

Oxidation states of P in {tex}H_4 P_2 O_5, H_4 P_2 O_6, H_4 P_2 O_7{/tex} are respectively.

A+3, +5, +4

B+5, +3, +4

C+5, +4, +3

D+3, +4, +5

Question 9 of 10

a, b, c (all positive) are the pth, qth, and rth terms of a geometric progression then

Apqr

Cp + q + r

Dpq + qr + rp

E(p + q + r)²

Question 10 of 10

A sample of radioactive substance with half-life of 3 days was found to contain only 3g of it, when received exactly 12 days after sealing.The amount of the radeioactive substance when it was sealed, was :

A6g

B12 g

C24 g

D48 g

That's all folks!

Hours

Minutes

Seconds

1 2 3 4 5 6 7 8 9 10

Do you want to submit the exam now ?

Your Time is Expired.

Report Issues

Please type your message here