Aldehydes, Ketones and Carboxylic Acids — Chemistry STD 12 Science — Question

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: E_Ag+/Ag increases with increase in concentration of Ag⁺ ions.
Reason: E_Ag+/Ag has a positive value.

'Alcohols are versatile compounds' discuss exaction of this statement by giving suitable example.

Give examples and suggest reasons for the following features of the transition metal chemistry
The lowest oxide of transition metal is basic, the highest is amphoteric/acidic.

Write note on freons.

State two main functions of carbohydrates.

1. Arrange the following compounds in increasing order of their property as indicated:

CH₃CHO, C₆H₅CHO, HCHO
(reactivity towards nucleophilic addition reaction)

2. 2,4-dinitrobenzoic acid, 4-methoxybenzoic acid, 4-nitrobenzoic acid

(acidic character)

What is the basic structural difference between starch and cellulose?

Which method is most suitable to determine molecular mass of polymer ?

Explain the rate expression for a reaction in which stoichiometric coefficients of reactants and produch are not same or unit.

Give reasons for the following:
Glucose and fructose give the same osazone.