Chemistry Test 6

Result

Chemistry Test 6

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Weekly Quiz Competition

Question 1
4 / -1

The number of unpaired electrons in a paramagnetic diatomic molecule of an element with atomic number 16 is

A
1

B
2

C
3

D
4

Solution

Atomic number = 16 i.e. S belongs to Oxygen family and exists as S₂ molecule in vapour state like O₂. It is paramagnetic since two unpaired electrons are present in antibonding pi molecular
orbital (π^*).
Question 2
4 / -1

Which base is present in RNA but not in DNA?

A
Uracil

B
Cytosine

C
Guanine

D
Thymine

Solution

RNA contains cytosine and uracil as pyrimidine bases while DNA has cytosine and thymine as pyrimidine bases. Uracil binds to adenine in RNA whereas thymine is present in DNA which binds to adenine. Both RNA and DNA have the same purine bases i.e., guanine and adenine. RNA is a polymeric molecule which is responsible for coding, decoding, regulation and expression of genes. RNA is assembled as chain of nucloetides and is found as a single strand in nature.
Question 3
4 / -1

Which of the following process is not responsible for the presence of electric charge on the sol particles?

A
Electron capture by sol particles

B
Adsorption of ionic species from solution

C
Formation of Helmholtz electrical double layer

D
Absorption of ionic species from solution

Solution

Absorption of ionic species from solution is not responsible for the presence of electric charge on the sol particles.