Amines — Chemistry STD 12 Science — Question

Differentiate between rate of reaction and reaction rate constant.

Explain :
(a) Acetic acid is a weaker acid than formic acid.
(b) Carboxylic acids have higher boiling points than aldehydes of comparable molecular mass.

Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.

1. Both assertion and reason are true and the reason is the correct explanation of assertion.
2. Both assertion and reason are true and the reason is not the correct explanation of assertion.
3. Assertion is true but the reason is false.
4. Both assertion and reason are false.
5. Assertion is false but reason is true.

Assertion: Λ_m for weak electrolytes shows a sharp increase when the electrolytic solution is diluted.
Reason: For weak electrolytes degree of dissociation increases with dilution of solution.

(i) When does sickle cell anemia disease appears?
(ii) What is the difference between the structure formula of thymine and uracil?
(iii) Define heredity and chromosome.

Arrange the following in order of property indicated for set.
CH₃CHO, CH₃CH₂OH, CH₃OCH₃, CH₃CH₂CH₃ (increasing order of boiling points).

Explain the difference between electrolytic conduction and metallic conduction.

Glucose is an aldohexose monosaccharide. Why does it react with hydrogen cyanide to form cyanohydrin but does not react with sodium hydrogen sulphite?

Explain the following items:
Avitaminosis.

Write one chemical reaction each to illustrate the following:

1. Hofmann’s bromamide reaction.
2. Gabriel phthalimide synthesis.

Which metal in the first series of transition metals exhibits +1 oxidation state most frequently and why?