Chemistry Test 20

Result

Chemistry Test 20

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Weekly Quiz Competition

Question 1
4 / -1

While performing fusion mixture test on a sulphate compound of an element, a green coloured compound is formed. The occurrence of green colour indicates the presence of which cation?

A
Mn²⁺

B
Cr²⁺

C
Fe²⁺

D
Co²⁺

Solution

Fusion mixture test is performed to confirm the presence of Mn or Cr cation. However, in case of Cr, yellow coloured compound is formed. Whereas, Fe and Co do not give fusion mixture test.
Question 2
4 / -1

The most suitable method of separation of 1:1 mixture of ortho and para-nitrophenols is:

A
Chromatography

B
Crystallization

C
Steam distillation

D
Sublimation

Solution

Due to the intramolecular hydrogen bonding in o-nitrophenol, steam distillation is one of the most suitable method of separation of 1:1 mixture of ortho and para nitrophenols.
Question 3
4 / -1

Which of the following species is paramagnetic in nature

A
Free radical

B
Carbonium ion

C
Carbonion

D
All the above

Solution

Presence of one or more unpaired electrons in an ion or molecule makes it paramagnetic, i.e. attracted by a magnetic field.Since free radical possess an unpaired electron, so it is paramagnetic.