The d & f Block Elements — Chemistry STD 12 Science — Question

What is meant by 'lanthanoid contraction'?

Name the following halides according to IUPAC system and classify them as alkyl, allyl, benzyl (primary, secondary, tertiary), vinyl or aryl halides:
(CH₃)₂CHCH(Cl)CH₃.

Bring out the following conversion:
Benzoic acid to Benzamide.

Give an example of anti-feezing agent?

What is meant by ‘limiting molar conductivity’?

How will you convert ethanal into the following compound?

But-2-enal.

Three iron sheets have been coated separately with three metals A, B and C whose standard electrode potentials are given below.

Metal	A	B	C	Iron
E°	-0.46V	-0.66V	-0.20V	-0.44V

Identify in which case rusting will take place faster when coating is damaged.

How can the reduction potential of an electrode be increased?

Which hybridisation occurs on oxygen in ether?

What is meant by the following term? Give an example of the reaction in each case.

Semicarbazone.