DEMOEXAM | ScoreExams

Question 1 of 10

Under which one of the following conditions, does the reaction take place,

ANH4OH / 80°C

Bconc.H₂SO_4s160Â°C

CAnhydrous ZnCl2 / 150°C

DCH3OK /160 - 200°C

Question 2 of 10

The values of λ so that the line 3x-4y=λ touches x²+y²-4x-8y-5=0 are

A-35, 15

B3, -5

C35, -15

D-3, 5

E20, 15

Question 3 of 10

The correct order of ionic radii of {tex}Y^{3+}, La^{3+}, Eu^{3+}{/tex} and {tex}Lu^{3+}{/tex}is

A{tex}Y^{3+} < La^{3+} + Eu^{3+} < Lu^{3+}{/tex}

B{tex}Lu^{3+} << Y^{3+} < Eu^{3+} < La^{3+}{/tex}

C{tex}Lu^{3+} < Eu^{3+} < La^{3+} < Y^{3+}{/tex}

D{tex}La^{3+} < Eu^{3+} < La^{3+} < Y^{3+}{/tex}

Question 4 of 10

A binary compound of elements X and Y contains 50% of X. If the atomic masses of X and Y are 10 and 20 and the molecular mass of the compound is 120, the molecular formula of the compound is

A{tex}X_2 {/tex}

B{tex}X_4Y_2{/tex}

C{tex}X_6Y_3{/tex}

D{tex}X_3Y_2{/tex}

Question 5 of 10

Which of the following is diamagnetic?

Asuperoxide ion

Bcarbon molecule

Cunipositive ion of nitrogen molecule

Doxygen molecule

Question 6 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 7 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 8 of 10

A2 tan x + c

B√cot x + c

C2 √tan x + c

Dtan ² x + c

Ecot x + c

Question 9 of 10

The correct IUPAC name of the acid

AZ-3-ethyl-4-methyl hex-3-en-1-oic acid

BZ-3-ethyl-4-methyl hexanoic acid

CZ-3, 4-diethylpent-3-en-1-oic acid

DE-3-ethyl-4-methylhex-3-en-1-oic acid

Question 10 of 10

The rate of a reaction doubles when its temperature changes from 300 K to 310 K. Activation energy of such a reaction will be: (R = 8.314 J{tex}K^{-1} mol^{-1}{/tex} and log2 = 0.301)

A{tex}53.6kJmol^{-1}{/tex}

B{tex}48.6kJmol^{-1}{/tex}

C{tex}58.5kJmol^{-1}{/tex}

D{tex}60.5kJmol^{-1}{/tex}