CBSE 12TH CHEMISTRY - Online Test
Q1. Ozone reacts with KOH solution to form
Answer : Option A
Explaination / Solution:
O3 reacts with KOH to form KO3
Q2. An atom located at the body center of a cubic unit cell is shared by
Answer : Option A
Explaination / Solution:
It is not been shared.
Q3. Cassiterite is the chief ore of
Answer : Option D
Explaination / Solution:
SnO2 is formula of casserite.
Q4. The correct name of the polymer below is:
Answer : Option B
Explaination / Solution:
This is Bakelite.
Q5. Red hot steel rods on suddenly immersing in water become
Answer : Option B
Explaination / Solution:
Red hot steel rods on suddenly immersing in water become hard and brittle.
Q6. Acetone is treated with excess of ethanol in the presence of hydrochloric acid. The product obtained is:
Answer : Option D
Explaination / Solution:
Q7. A patient was suffering from severe pain after a major operation. To reduce his pain, the doctor administered
Answer : Option C
Explaination / Solution:
Narcotic analgesic are given to reduce the pain.
Q8. The correct IUPAC name of [Fe(C5H5)2] is
Answer : Option C
Explaination / Solution:
C5H5 is cyclopentadienyl ligand. Name of ligand is written first.
Q9. Emf of the cell
at 298 K is
at 298 K is
Answer : Option D
Explaination / Solution:
Q10. Hydrocarbons having double the number of carbon atoms than present in the original alkyl halide are produced by using
Answer : Option B
Explaination / Solution:
The Wurtz reaction, named after Charles-AdolpheWurtz, is a coupling reaction in organic chemistry, organometallic chemistry and recently inorganic main group polymers, whereby two alkyl halides arereacted with sodium metal in dry ethereal solution to form a higher alkane:
