CBSE 12TH CHEMISTRY - Online Test
Q1. Which among the following is miscible in each other?
Answer : Option A
Explaination / Solution:
Methanol and Water both are Polar. There is intermolecular Hydrogen Bonding interaction.
Q2. The Hofmann elimination proceeds via a(n) __________ pathway.
Answer : Option D
Explaination / Solution:
Hoffmann elimination follows mechanism.
Q3.
The below molecule is called
Answer : Option A
Explaination / Solution:
This polymer is polyvinylchloride.
Q4. Which gas has a smell of rotten fish?
Answer : Option C
Explaination / Solution:
Phosphine has smell like rotten fish.
Q5. Solid X is a very hard electrical insulator in solid as well as in molten state. It melts at extremely high temperature. Solid X is a
Answer : Option B
Explaination / Solution:
Covalent solid doesnot conduct electricity in molten and solid state.
Q6. Extraction process of Bauxite is known as
Answer : Option D
Explaination / Solution:
Hall – Heroult process of extraction of Al from Bauxite.
Q7. Which of the following sulphides is soluble in aqua regia?
Answer : Option C
Explaination / Solution:
HgS is only soluble in aqua regia
Q8. The correct sequence of steps involved in the mechanism of Cannizzaro's reaction is
Answer : Option D
Explaination / Solution:
In cannizaro reaction 1st nucleophile OH− attacks on carbonyl carbon. Then hydride shifting take place. Followed by proton transfer.
Q9. Drugs, which inhibit the enzymes that catalyze the degradation of noradrenaline, are
Answer : Option A
Explaination / Solution:
They are antidepressants.
Q10. Which of the following is a negative ligand?
Answer : Option B
Explaination / Solution:
C5H5− a negative ligand.
