DEMOEXAM | ScoreExams

Question 1 of 10

A flask was filled with {tex}CCl_4{/tex} vapours at a particular temperature and pressure. These vapours were then replaced by oxygen gas at the same temperature and pressure, the mass of {tex}CCl_4{/tex} vapours will be

Asame as that of {tex}O_2{/tex}

Bfive times heavier than that of {tex}O_2{/tex}

Ctwo times heavier than that of {tex}O_2{/tex}

Done fifth of that of {tex}O_2{/tex}

Question 2 of 10

The least stable free radical is

A

{tex} CH_{3}CH_{2}{/tex}

B

{tex}CH_{3}CH_{2}CH_{2}{/tex}

C

{tex} (CH_{3})_{2}CH{/tex}

D

{tex} CH_{3}{/tex}

Question 3 of 10

Two identical balls A and B collide head on elastically. If the velocity of A and B before collision are 0.5 m/s and -0.3m/s respectively, then their velocities after collision will be

A0.5 m/s and 0.3 m/s

B-0.5ms^-1 and 0.3ms^-1

C0.3ms^-1 and -0.5ms^-1

D-0.3ms^-1 and 0.5ms^-1

Question 4 of 10

Among the following compounds, the one that gets hydrolysed to form metallic hydroxide, hydrogen peroxide and oxygen is

A{tex} Na_{2}O{/tex}

B{tex} Na_{2}O_{2}{/tex}

C{tex} Li_{2}O{/tex}

D{tex} KO_{2}{/tex}

Question 5 of 10

A binary liquid solution is prepared by mixing n - heptane and ethanol. Which one of the following statement is correct regarding the behaviour of the solution?

AThe solution formed is an ideal solution

BThe solution is non-ideal showing +ve deviation from Raoult's law

CThe solution is non-ideal, showing -ve deviation from Raoult's law

Dn - heptane shows +ve deviation while ethanol shows -ve deviation from Raoult's law

Question 6 of 10

Two bodies are thrown vertically upwards with their initial speeds in the ratio 2 : 3. The ratio of the maximum heights reached by them and the ratio of their time taken by them to return back to the ground respectively are

A4: 9 and 2 : 3

B2:3 and √2:√3

C√2:√3 and 4:9

D√2:√3 and 2:3

E4:9 and √2:√3

Question 7 of 10

Auto reduction is employed in the metallurgy of :

AHg

BAl

CTi

DZn

ECr

Question 8 of 10

A solution of urea (mol. Mass 60g {tex}mol^{-1}{/tex}) boils at {tex}100.18^\circ{/tex} C at the atmospheric pressure. If {tex}K_f{/tex} and {tex}K_b{/tex} for water are 1.86 and 0.512 K kg {tex}mol^{-1}{/tex} respectively, the above solution will freeze at

A{tex}-6.54^\circ{/tex}

B{tex}-0.654^\circ{/tex} C

C{tex}6.54^\circ{/tex} C

D{tex} 0.654^\circ{/tex} C

Question 9 of 10

Propyne is treated with sodamide and the product is treated with methyl iodide to get

AButylamine

B2 - butene

C2 - butyne

DPropyl methyl amine

Question 10 of 10

The critical temperature of {tex}O_2, N_2, H_2{/tex} and {tex}CO_2{/tex} are 154.3K, 126K, 33.2K and 304K respectively. The extent of adsorption on tungsten may be highest in case of

A{tex}H_2{/tex}

B{tex}N_2{/tex}

C{tex}O_2{/tex}

D{tex}CO_2{/tex}