Elements of Groups 16, 17 and 18 — Chemistry STD 12 Science — Question

Write chemical reactions for the following conversions:
(i) Ethyl bromide to ethyl methyl ether (ii) Ethyl bromide to ethene (iii) Bromobenzene to toluene. (iv) Chlorobenzene to biphenyl.

Write the names of classes of polymers formed according to intermolecular forces and describe briefly their structural characteristics.

A single electrode potential can’t be measured but the cell potential can be measured. Explain.

Describe electrolysis of aqueous NaCl.

Amines have boiling points higher than the hydrocarbon but lower than the alcohols of comparable masses. Explain, why?

What is van’t Hoff factor?

(1) Is galactose an aldohexose or a ketohexose?
(2) Which carbon in galactose has different configuration compared to glucose?
(3) Draw Haworth formulae of α-D-galactose and β-D-galactose.
(4) Which disaccharides among sucrose, maltose and lactose is/are expected to give positive Fehling test?
(5) What are the expected products of hydrolysis of lactose?

Indentify the strongest and the weakest oxidizing agents from the electrochemical series.

Write reactions for the action of the following reagents on p-chlorobenzaldehyde.
Tollen’s reagent

Trichloro acetic acid is a stronger acid than acetic acid. ExplaIn.