CBSE 12TH CHEMISTRY - Online Test
Q1. For which of the following reaction the units of rate constant and rate of the reaction are same?
Answer : Option A
Explaination / Solution:
Rate=k[Reactant]0
Q2. Gelatine is often used as an ingredient in the manufacture of ice cream for
Answer : Option B
Explaination / Solution:
Gelatin is used as ingredient in manufacture of ice cream.
Q3. Nitro compounds are reduced by iron scrap and hydrochloric acid to yield one of the following compounds.
Answer : Option D
Explaination / Solution:
Scrap iron with HCl acts as a reducing agent to reduce nitro group to amine.
Q4. 3 – methyl phenol is called
Answer : Option A
Explaination / Solution:
Meta-Cresol (m-cresol) also 3-methylphenol, is an organic compound with the formula
Q5. Raoult’s law states that for a solution of volatile liquids the partial pressure of each component in the solution is
Answer : Option D
Explaination / Solution:
Raoult’s law states that for a solution of volatile liquids the partial pressure of each component in the solution is directly proportional to mole fraction of component.
Q6. Formation of Buna – S, involves polymerization of
Answer : Option A
Explaination / Solution:
Buna S involves the polymerization of 1,3butadiene and styrene.
Q7. Ammonia has a higher boiling point and is less volatile because of
Answer : Option B
Explaination / Solution:
In the solid and liquid states NH3
is associated through intermolecular hydrogen bonding and therefore it
has higher boiling point and less volatile compared to other hydrides
of group 15.
Q8. The sulphide ore of iron is
Answer : Option D
Explaination / Solution:
FeS2 is iron pyrites.
Q9. Transition metals with highest melting point is
Answer : Option A
Explaination / Solution:
W belongs to 5d series and also it have lot of unpaired electrons thus it forms strong metallic bonding.
Q10. Prop – 2 – enal is called
Answer : Option C
Explaination / Solution:
this is Acrolein.
this is Acrolein.
