CBSE 12TH CHEMISTRY - Online Test
Q1. Nylon – 2 – Nylon – 6 is
Answer : Option C
Explaination / Solution:
They both are biodegradable polymer.
Q2. Which among the following does not exhibit positive oxidation state?
Answer : Option D
Explaination / Solution:
Fluorine is most electronegative element, it shows only -1 oxidation state.
Q3. In extraction of gold and silver, the metals is leached into aqueous solution using
Answer : Option B
Explaination / Solution:
CN−forms complex with gold or silver.
Q4. Which one of the following is an example of non – typical transition elements?
Answer : Option A
Explaination / Solution:
Zn, Cd and Hg are not considered as transition elements because they donot have incompletely filled d orbital in its ground state or stable oxidation state
Q5. The following reaction is
Answer : Option C
Explaination / Solution:
This is Friedal Craft reaction.
Q6. Barbiturates are important class of
Answer : Option B
Explaination / Solution:
Barbiturates are important class of Tranquilisers.
Q7. In corrosion a metal is ______ of electrons to oxygen and formation of oxides
Answer : Option D
Explaination / Solution:
Metals is oxidized by loss of electrons on corrosion.
Q8.
The dipole moment of chlorobenzene is lower than that of cyclohexyl chloride
chlorobenzenecyclohexyl chloride
chlorobenzenecyclohexyl chloride
Answer : Option D
Explaination / Solution:
Sp2 carbon is more electronegative than sp3 carbon.
Q9. The substance that slows down the reaction without being consumed is known as
Answer : Option B
Explaination / Solution:
Inhibitors inhibits the action of catalyst and hence slows down the rate of reaction.
Q10. Which among the following is adsorbed greatly by activated charcoal?
Answer : Option B
Explaination / Solution:
SO2 due to high polarity and surface area is adsorbed maximum.
