CBSE 12TH CHEMISTRY - Online Test
Q1. Silicon carbide is an example of
Answer : Option B
Explaination / Solution:
SiC is a network solid.
Q2. In which of the following polymers ethylene glycol is one of the monomer units?
Answer : Option A
Explaination / Solution:
Formation of Dacron involves ethylene glycol and terephthalic acid as monomer unit.
Q3. In dilute alkaline solution, MnO4−− changes to
Q4. The appropriate reagent for the transformation:
Answer : Option D
Explaination / Solution:
For this reaction wolff Kishner reaction is used as –OH is acid sensitive group so clemmson cannot be used.
Q5. Which of the following complex ions/molecules of nickel is paramagnetic?
Answer : Option A
Explaination / Solution:
Ni2+ is in 3d8 configuration so its para magnetic .
Q6. The purpose of adding bithional to medicated soaps is
Answer : Option C
Explaination / Solution:
bithional impart antiseptic properties.
Q7. How much electricity in terms of Faraday is required to produce 20.0 g of Ca from molten CaCl2?
Answer : Option B
Explaination / Solution:
20g is 0.5 mol of and for 1mol 2F charge is required.
Q8. The most common freons in industrial use is manufactured by
Answer : Option D
Explaination / Solution:
Most common Freon is synthesized by Swartz reaction.
Q9. Which among the following is an example of photochemistry used in our daily life?
Answer : Option B
Explaination / Solution:
Photography is an example of photochemistry used in our daily life. Reaction takes place in the presence of light
Q10. The average molecular mass of colloidal can be determined by
Answer : Option B
Explaination / Solution:
Average molecular mass of colloidal solution is determined by Osmotic Pressure measurement.
