CBSE 12TH CHEMISTRY - Online Test
Q1. zwitter ionic form of amino acids behave like
Answer : Option A
Explaination / Solution:
Zwitter ion contain two polar group, amino and carboxalic acid group.
Q2. Lucas test is associated with
Answer : Option D
Explaination / Solution:
Lucas Test is a test which is used to distinguish between primary, secondary and tertiary alcohols. This test is carried out with the help of Lucas reagent, which is a solution of anhydrous Zinc Chloride and concentrated hydrochloric acid (ZnCl2 + HCl). It is based on the difference between the reactivity of primary, secondary and tertiary alcohols with hydrogen halides.
Q3. Which among the following is an example of a solid solution in which the solute is a gas?
Answer : Option A
Explaination / Solution:
Pumice stone is example of gas in Solid.
Q4. Secondary amines react with the nitrosonium ion to generate:
Answer : Option C
Explaination / Solution:
amines react with to form N-nitrosoamine.
Q5. Which gas is evolved when urea is treated with NaOH?
Answer : Option A
Explaination / Solution:
Urea on reaction with NaOH liberates ammonia.
Q6. What type of interaction hold the molecules together in a polar molecular solid?
Answer : Option A
Explaination / Solution:
Polar molecule will act as a dipole.
Q7. Which metal ores occur in lakes and sea?
Answer : Option A
Explaination / Solution:
Halides ores occur in lakes and sea.
Q8. Hydrocarbons are prepared from Grignard reagent by
Answer : Option B
Explaination / Solution:
This is nylon 6,6 formed by polymerization of adipic acid and hexamethylenediamine.
Q9. Mohr’s salt is a better volumetric agent then ferrous sulphate because
Answer : Option B
Explaination / Solution:
Mohr’s salt is a better volumetric agent then ferrous sulphate because
it is less readily oxidised in the solid state. Also Mohr salt is more
stable than FeSO4 .
Q10. Benzaldehyde and acetone can be best distinguished using
Answer : Option A
Explaination / Solution:
Aldehydes show tollen’s test while acetone which is a ketone doesnot give tollen’s test.
