Why Kaysons ?

Video lectures

Access over 500+ hours of video lectures 24*7, covering complete syllabus for JEE preparation.

Online Support

Practice over 30000+ questions starting from basic level to JEE advance level.

Live Doubt Clearing Session

Ask your doubts live everyday Join our live doubt clearing session conducted by our experts.

National Mock Tests

Give tests to analyze your progress and evaluate where you stand in terms of your JEE preparation.

Organized Learning

Proper planning to complete syllabus is the key to get a decent rank in JEE.

Test Series/Daily assignments

Give tests to analyze your progress and evaluate where you stand in terms of your JEE preparation.

SPEAK TO COUNSELLOR ? CLICK HERE

Question

Actinides

Solution

Correct option is

Have variable valency

Actinides have variable valency due to very small difference in energies of 5f, 6d and 7s orbitals.

Testing

SIMILAR QUESTIONS

Q1

Prussian blue is due to formation of

Q2

On adding excess of NH3 solution CuSO4 solution, the dark blue colour is due to

Q3

Which statement is not correct?

Q4

Yellow mercury (II) oxide is obtained when

Q5

Which of the following method can’t be used to prepare anhydrous zinc chloride?

Q6

Which lanthanoid compound is used as a most powerful liquid lasers after dissolving it in selenium oxychloride?

Q7

Which one of the following acts as an oxidizing agent?

Q8

Across the lanthanide series, the basicity of lanthanide hydroxides

Q9

The +3 ion of which one of the following has half-filled 4f subshell?

Q10

Lanthanide contraction occurs because