Chemistry Test 132

Result

Chemistry Test 132

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Weekly Quiz Competition

Question 1
4 / -1

The cations present in 'A'

A
K⁺ & Na⁺

B
K⁺ & NH₄⁺

C
NH4⁺ & Fe2⁺

D
Mg2⁺ & Na⁺

Solution
Question 2
4 / -1

20 g helium is compressed isothermally and reversibly at 27 °C from a pressure of 2 atmosphere to 20 atmosphere. The change in the value of heat energy change during the process is (R = 2 cal kelvin^-1 mol^-1)

A
83.14 kcal

B
-6.9 kcal

C
-20.7 kcal

D
6.9 kcal

Solution
Question 3
4 / -1

Which of the following type of compound is used to increase the hardness of the silicone polymer.

A
R₂SiCl₂

B
RSiCl₃

C
R₃SiCl

D
None of these

Solution

Hydrolysis followed by condensation polymerization of RSiCl₃ produces 3-D cross-linked silicones which are hard.
Question 4
4 / -1

Consider the reaction 2A + B →products, when the concentration of A alone was doubled, the half-life of the reaction did not change. When the concentration of B alone was doubled, the rate was not altered. The unit of rate constant for this reaction is

A
s^{− 1}

B
L mol ^{− 1} s ^{− 1}

C
mol L ^{− 1} s ^{− 1}

D
mol ^{− 2} L5 s ^{− 1}

Solution
Question 5
4 / -1

The products A and B of the above reaction are respectively

A
C₆H₅OH, C6H₅BF₃

B
C₆H₅N₂Cl and C₆H₅F

C
C₆H₅N₂Cl and C₆ H₅Cl

D
C₆H₅N₂Cl and C₆H₅OH

Solution
Question 6
4 / -1

0.066 g of a metal was deposited when a current of 2 ampere passed for 100 seconds through an aqueous solution of its metal ion. The equivalent mass of the metal is-

A
31.8

B
108.0

C
8.0

D
68.0

Solution

Total charge passed in Coulombs = It = 2 X100 = 200 Coulombs
200 Coulombs of charge deposits 0.066 g of metal.
Equivalent mass of the metal is that mass of metal deposited by 1 Farad or 96500 Coulombs.
Equivalent mass of metal
Question 7
4 / -1

A mixture of gaseous nitrogen and gaseous hydrogen attains equilibrium with gaseous Ammonia according to the reaction

It is found that at equilibrium when temperature is 673 K , atmospheric pressure is 100, moles of gaseous nitrogen and gaseous hydrogen are in ratio 1:3 and mole percent of gaseous ammonia is 24 . The equilibrium constant Kp for the reaction at the above condition is-

A
0.0128 atm^-1

B
0.1876 atm^-1

C
0.0186 atm^-1

D
0.558 atm^-1

Solution
Question 8
4 / -1

A
CH₃CH(OH)₂, CH₃CH(OH)COOH

B
CH₃CHO, CH₃CH(OH)COOH

C
CH₃CH₂COOH, CH₃CH₂OH

D
CH₃CH(OH)COOH, CH₃CH₂OH

Solution
Question 9
4 / -1

Study the following reactions and identify the reactant 'R'.

A

B

C

D

Solution
Question 10
4 / -1

A new carbon – carbon bond is formed in:

A
(II)

B
(II) and (IV)

C
(I), (II), (III), (IV)

D
None

Solution

New carbon-carbon bond is formed is Friedal Craft reaction and Reimer-Teimann reaction