CBSE 12TH CHEMISTRY - Online Test
Q1. Which among the following ores are not found on earth’s crust?
Answer : Option C
Explaination / Solution:
Nitrides are not found in Earth crust.
Q2. PHBV is developed because :
Answer : Option D
Explaination / Solution:
PHBV is used to reduce accumulation of the synthetic solid polymer waste.
Q3. Silver is refined by cupellation process. The process removes the impurity of
Answer : Option D
Explaination / Solution:
Cupellation removes the impurity of Pb.
Q4. The compound obtained when acetaldehyde reacts with dilute aqueous sodium hydroxide exhibits:
Answer : Option C
Explaination / Solution:
CH3 CH=CHCHO is the product which is suitably substituted so will show geometrical isomer.
Q5. The water free from ions
Answer : Option D
Explaination / Solution:
Water free from and ions is soft water.
Q6. The correct IUPAC name of Mn3(CO)12 is
Answer : Option A
Explaination / Solution:
Ligands are named 1st followed by the name of central metal ion.
Q7. Calculate the standard cell potentials of galvanic cell, ∆_r G^oand equilibrium constant of the reactions if the reaction is
Answer : Option A
Explaination / Solution:
Q8. Name the following aryl halide as per the IUPAC system
Answer : Option D
Explaination / Solution:
At position 1 chloro group is present and at 2-methylpropyl is present.
Q9. Rate of ionic reactions are generally
Answer : Option D
Explaination / Solution:
Ionic reactions occur very fast.
Q10. Ammonia is adsorbed on activated charcoal to a larger extent as compare to CO because
Answer : Option C
Explaination / Solution:
Ammonia is easily liquefiable because of h bonding interactions.
