CBSE 12TH CHEMISTRY - Online Test
Q1.
What is the order of a reaction which has a rate expression ; Rate =
Answer : Option A
Explaination / Solution:
Total order of reaction = order wrt to A + order wrt to B.
Q2. Which one of the following is an example of micelle system?
Answer : Option B
Explaination / Solution:
Soap have hydrophobic tails and hydrophilic heads so they can act micelle.
Q3. The following amine can be classified as
Answer : Option D
Explaination / Solution:
This is tertiary amine but since all the alkyl groups are attachted so it is mixed amine.
Q4. Anisole is called
Answer : Option A
Explaination / Solution:
Anisole, or methoxybenzene, is an organic compound with the formulaCH3OC6H5 .
It is a colorless liquid with a smell reminiscent of anise seed, and in
fact many of its derivatives are found in natural and artificial
fragrances.
Anisole, or methoxybenzene, is an organic compound with the formula
Q5. For ideal solution the volume of mixing of the pure components to form the solution is
Answer : Option B
Explaination / Solution:
For ideal solution there is no increase or decrease in volume on mixing.
Q7. Which among the following forms basic oxide?
Answer : Option D
Explaination / Solution:
As we move down the group in periodic table , metallic character increases so Bi is a metal thus its oxide is basic.
Q8. The common impurity present in most of the ores is
Answer : Option A
Explaination / Solution:
Silica is most common impurity present in ores.
Q9. Which among the following is not considered as a part of 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.
Q10. CH3 CH(OCH3 )CHO is called
Answer : Option C
Explaination / Solution:
This is Methoxypropionaldehyde or 2 – Methoxypropanal
