Chemistry Test 103

Result

Chemistry Test 103

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Weekly Quiz Competition

Question 1
4 / -1

Select the CORRECT statements?

(i) [Zn(gly)₂] is optically active compound

(ii) [PdClBr(gly)]⊖ exhibits geometrical isomerism

(iii) [IrBr₄(en)]⊖ exhibits cis trans isomerism

(iv) [RhCl₂(NH₃)₄]⁺ number of stereo isomers is equal to number of geometrical isomers

A
(i), (ii), (iv)

B
(ii), (iii), (iv)

C
(ii), (iii)

D
(i), (iii), (iv)
Question 2
4 / -1

A sample of hydrogen atoms de-excites from 6th excited state to the ground state in one or more electronic transitions. If no spectral line is obtained in the Paschen and Brackett series, then the maximum number of spectral lines of different photon energies obtained will be -

A
21

B
15

C
10

D
7

Solution
Question 3
4 / -1

Hydrolysis of sucrose into (+) glucose and (-) fructose is known as-

A
Mutarotation

B
Inversion

C
Pyrolysis

D
none of these

Solution

Sucrose D(+) glucose + D(-) Fructose

[α]= + 66.5º [α]= + 52.5º [α] = -92.8º

Thus rotation changes from positive to negative after hydrolysis. Due to this reason hydrolysis of sucrose is known as inversion and mixture after hydrolysis is known as invert sugar.

Therefore option (B) is correct.
Question 4
4 / -1

Which of the following reduction methods is correctly matched against the given metals (commercial process)?

A
Self reduction

B
(Au, Ag) → Electrolytic reduction

C
(Cr, Mn) → Thermite reduction

D
(Fe, Al) → Carbon reduction
Question 5
4 / -1

An equilibrium mixture contains 2.0 moles of A(g) and 4.0 moles of B(g). Now, 2.0 moles of A(g) is added in this equilibrium mixture and the system is allowed to re-achieve equilibrium at constant volume and temperature. Now, the volume of system is doubled at constant temperature. What should be the moles of B(g) at new equilibrium? The reaction involved is

A
3.86

B
5.86

C
4.86

D
6.58

Solution
Question 6
4 / -1

Nylon-66 is obtained by condensation polymerization of-

A
Adipic acid and hexamethylene diamine

B
Phenol and formaldehyde

C
Terephthalic acid and ethylene glycol

D
Succinic acid and hexamethylene diamine.

Solution
Question 7
4 / -1

If Q is a colourless gas with rotten fish smell then select CORRECT statement.

A
(Q) also produced on heating of H₃PO₄

B
Structure of (P) is polymeric

C
Only two oxy bridges are present in (S)

D
Zero acidic hydrogen present in anionic part of (R)
Question 8
4 / -1

Which reagent can not be used to distinguish t-Butyl alcohol and isopropyl alcohol :

A
KMnO₄

B
HCl + Anhy ZnCl₂

C
Ammonical AgNO₃

D
K₂Cr₂O₇
Question 9
4 / -1

The only INCORRECT information is

A
In isothermal expansion of an ideal gas, internal energy of the gas remains unchanged.

B
In adiabatic free expansion of a Vanderwaal gas, the internal energy of gas remains unchanged.

C
In adiabatic free expansion of an ideal gas, the initial and final temperature of the gas remains same.

D
In adiabatic free expansion of a Vanderwaal gas, the initial and final temperature of gas will remains same.

Solution

q = 0 , w = 0, ΔU = 0 = f(V,T)

As volume changes, temperature must change to maintain constant internal energy.
Question 10
4 / -1

(Y) & (Z) both show disproportination with conc. NaOH. Then X will be -

A

B
(CH₃)₃C–CH₂–CH=CH₂

C
(CH₃)₃C–CH=CH₂

D