Biomolecules — Chemistry STD 12 Science — Question

Bring out the following conversion:
Propanoic acid to Acetic acid.

What is the reference electrode in determining the standard electrode potential?

Draw structure of the derivative :
Acetaldehyde dimethyl acetal

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. Assertion and reason both are correct statements and reason is correct explanation for assertion.
2. Assertion and reason both are correct statements but reason is not correct explanation for assertion.
3. Assertion is correct statement but reason is wrong statement.
4. Assertion and reason both are incorrect statements.
5. Assertion is wrong statement but reason is correct statement.

Assertion: When a solution is separated from the pure solvent by a semipermeable membrane, the solvent molecules pass through it from pure solvent side to the solution side.
Reason: Diffusion of solvent occurs from a region of high concentration solution to a region of low concentration solution.

Arrange each set of compound in order of increasing boiling points.
1-Chloropropane, Isopropyl chloride, 1-Chlorobutane.

What is the source of pectin? What is its use ?

Write Electronic configuration of Third transition metal : Ta

Give reasons for the following:
Iodoform is obtained by reaction of acetone with hypoiodite ion but not iodide ion.

Explain giving reason :
The transition metals generally form coloured compounds.