CBSE 12TH CHEMISTRY - Online Test
Q1. The coordination number of the central ion may be obtained from
Answer : Option D
Explaination / Solution:
Coordination number of the central ion is equal to no. of coordination bonds formed with surrounding ions.
Q2. Ortho – sulphobenzimideis
Answer : Option B
Explaination / Solution:
It is artificial sweetner.
Q3. Relationship between equilibrium constant of the reaction and standard potential of the cell in which that reaction takes place is
Answer : Option B
Explaination / Solution:
At equilibrium E cell becomes zero .
Q4. Bromomethane, Chloromethane, Dibromomethane. 1 – Chloropropane, Isopropyl chloride, 1 – Chlorobutaneare all
Answer : Option C
Explaination / Solution:
These all are covalent compounds hence are soluble in organic solvents.
Q5. The polymer(s) of dextrose is
Answer : Option C
Explaination / Solution:
Cellulose and Stach is polymer of dextrose.
Q6. Which of the following statement is true for order of a reaction?
Answer : Option A
Explaination / Solution:
Order of a reaction is experimentally determined quantity so it can be negative fractional or zero.
Q7. Artificial smoke screens used in the warfare are colloidal dispersion of
Answer : Option A
Explaination / Solution:
Artificial smoke screens used in the warfare are colloidal dispersion of Titanium oxide.
Q8. One of the following is not a dihydroxy derivative of benzene.
Answer : Option A
Explaination / Solution:
- Catechol is o- hydroxyl phenol or Catechol also known as pyrocatechol or 1,2- dihydroxybenzene,
- Resorcinol is m- hydroxyphenol
- Quinol is p-hydroxyphenol or benzene-1,4-diol is an aromatic organic compound that is a type of phenol, a derivative of benzene.
Q9. For producing amines, the reaction of nitro compounds with iron scrap is preferred because
Answer : Option C
Explaination / Solution:
This reaction is preferred because on reduction of nitro compouns to amine , Fe will get oxidize to Fe(II) a which on hydrolysis will produce HCl which is required in the reaction.
Q10. Minimum boiling azeotrope is form by the solution which show
Answer : Option D
Explaination / Solution:
Positively deviated non ideal solution forms Minimum boiling Point azeotropes.
