Cerium (Z = 58) is an important member of the lanthanoids. Which of the following statements about cerium is incorrect?

4f/5d subshells are very close in energy. +ve electrons can jump from 4f to 5d or vice-versa.

In the lanthanide series, +3 oxidation state is most common i.e., Ln(III) compounds are predominant. However, +2 and +4 oxidation states can also be found in the solution or in...

(c) : The common stable oxidation state of all the lanthanides is +3. The oxidation states of +2 and +4 are also exhibited and these oxidation states are only stable...

(d) : Availability of 4f electrons does not result in the formation of compounds in +4 state for all the members of the series.

(d) (i) The ITER (International Thermonuclear Experimental Reactor) project aims to make the long-awaited transition from experimental studies of plasma physics to full-scale electricity-producing fusion power stations. (ii) As such project...

(b) This question can be directly solved from Disha publication’s Polity compendium, page P-121. • For PRI Bodies minimum age is 21 years, to contest elections, sofirst statement is wrong. • 2nd...

(d) Decorum means maintaining proper behaviour. Interpellation means formal right of a Parliament to submit formal question to the government. Crossing the floor means to vote against the party lines. Yielding...

(d) For each combination, let us name the females and males Female (3) Male (5) A B C D E F G H Since A can’t go with B, it will make team with four males in four ways AD, AF,...

The answer is  (D) 5 years

The answer is (B) 25 years and 30 years respectively