CBSE 12TH CHEMISTRY - Online Test

Q1. The rate of reaction can be measured as
Answer : Option B
Explaination / Solution:

Rate of reaction can be measured in terms of Rate of disappearance of reactant or rate of apperance of product.

Q2. The activity of the iron catalyst used in Haber’s process is adversely affected due to presence of
Answer : Option D
Explaination / Solution:

CO act as a poison for Fe.

Q3. The following amine can be classified as

Answer : Option C
Explaination / Solution:

This is primary amine, because the Nitrogen of amine is only connected to one carbon.

Q4. Give IUPAC names of the following compound:
Answer : Option A
Explaination / Solution:

Lowest set of locants: The lowest set of locants is defined as the set that, when compared term by term with other locant sets, each cited in order of increasing value, has the lowest term at the first point of difference. With regard to numbering of locants, simple prefixes (simple substituent groups consisting of just one part that describes an atom, or group of atoms as a unit, for example methyl and ethoxy) are considered together with equal seniority: Therefore, the given compound is named as 2-ethoxy-1,1-dimethylcyclohexane rather than 1-ethoxy-2,2-dimethylcyclohexane since the locant set ‘1,1,2’ is lower than ‘1,2,2’.

Q5. Which law shows relation between pressure and solubility of a gas in solvent
Answer : Option B
Explaination / Solution:

Henry’s Law states that as the partial pressure of gas increases over liquid solubility of gas also increases.

Q6. cellulose acetate (rayon) and cellulose nitrate are __________ polymers
Answer : Option A
Explaination / Solution:

It is semi synthetic polymer.

Q7. In which of the following compound, nitrogen shows the oxidation state of +5?
Answer : Option A
Explaination / Solution:

Oxidation state of O is -2 and H is +1. Let the oxidation state of N is x.

(+1) +x + 3(-2) = 0

x = +5


Q8. Which is the most abundant metal on earth?
Answer : Option B
Explaination / Solution:

Aluminium is most abundant.

Q9. Which among the following is the coinage metal?
Answer : Option A
Explaination / Solution:

Cu , Ag ,Au are known as coinage metals.

Q10. Give IUPAC names of the following compound:
Answer : Option B
Explaination / Solution:

This is 1-phenyl propan-1-one.