CBSE 12TH CHEMISTRY - Online Test
Q1. The adsorbent used in decolouration of vinegar and sugar solution is
Answer : Option C
Explaination / Solution:
It adsorbs the colour in solutions.
Q2. In aqueous solution, amino acids behave like:
Answer : Option C
Explaination / Solution:
As both acidic and basic group is present and zwittter ion is formed
Q3. In the reaction
`
`
Answer : Option A
Explaination / Solution:
Phenol reacts with sodium hydroxide solution to give a colourless solution containing sodium phenoxide. In this reaction, the hydrogen ion has been removed by the strongly basic hydroxide ion in the sodium hydroxide solution.
Q4. Solution is defined as
Answer : Option A
Explaination / Solution:
Solution is Homogeneous mixture of Solute and Solvent.
Q5. Which of the following amines is most soluble in water?
Answer : Option C
Explaination / Solution:
Because of hydrogen bonding with water, ethylamine is highly soluble in water.
Q6. Intermolecular forces of thermoplastic polymers are
Answer : Option B
Explaination / Solution:
Intermolecular forces are intermediate between elastomers and fibres.
Q7. Which of the following is an amphoteric oxide?
Answer : Option A
Explaination / Solution:
Higher oxidation state oxides are acidic while lower oxidation state oxides are basic. Intermediate oxidation state oxides are amphroteric.
Q8. Dislocation defect is also known as
Answer : Option D
Explaination / Solution:
In frenkel defect cation gets dislocated from its position.
Q9. Which metal is used in paints and lacquers?
Answer : Option C
Explaination / Solution:
Al is generally used in paints and lacquers.
Q10. Which of the following compound is amphoteric?
Answer : Option A
Explaination / Solution:
Cr(OH)3 is amphroteric.
