CBSE 12TH CHEMISTRY - Online Test
Q1. At 1123 K temperature in the blast furnace , CO reduces
Answer : Option B
Explaination / Solution:
At this Temp range free energy for the process is negative.
Q2. Laughing gas is soluble in
Answer : Option A
Explaination / Solution:
N2O is soluble in water.
Q3. Electrical conductivity of semi conductors increases with increase in
Answer : Option A
Explaination / Solution:
Conductivity increases with temperature.
Q4. The commercial name of polyacrylonitrile is ______________.
Answer : Option A
Explaination / Solution:
Commercial name of polyacrylonirile is Orlon.
Q5. Which is called chromic acid?
Answer : Option C
Explaination / Solution:
CrO3 is chromic oxide.
Q6. Which of the following has most acidic hydrogen?
Answer : Option B
Explaination / Solution:
2,4-hexanedione will have active metylene group.
Q7. Which isomerism is exhibited by the compound [Co(NH3)3(H2O)3]Cl3 ?
Answer : Option A
Explaination / Solution:
Complex of type [ Ma3b3] show geometrical isomerism.
Q8. Alkyl benzenesulphonate, an anionic detergent is widely used in
Answer : Option D
Explaination / Solution:
It is used in house hold detergents.
Q9. How much electricity is required in coulomb for the oxidation of 1 mol of to ?
Answer : Option C
Explaination / Solution:
For 1 mol to 2 mol of electrons are required.
Q10. Freons diffuses unchanged into the stratosphere. It can
Answer : Option D
Explaination / Solution:
Freons disturbs the natural ozone balance and initial free radical rxn.
