MEDIUM
Earn 100

Describe the colours of actinide cations.

Important Questions on The d- and f-Block Elements

HARD
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Actinoids
The maximum oxidation state which actinoid element can exhibit is
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Actinoids
The maximum number of possible oxidation states of actinoids are shown by:
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Actinoids
Which of the following statements are correct?
A) The separation of actinoid elements from each other is difficult.
B) The covalency of the compounds of actinoid metals decrease from left to right along actinoid series.
C) The compounds of Lawrencium are most covalent.
D) U and Th occur naturally in substantial quantities.
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Actinoids
The reason for greater range of oxidation states in actinoids is attributed to
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Actinoids
Which among the following elements does NOT form oxocation?
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Actinoids
Actinoid contraction is greater from element to element than lanthanoid contraction. Why?
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Actinoids
Which one of the following actinoid has no electron in 6d orbital?
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Actinoids
Which one of the following statements related to lanthanons is incorrect?
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Actinoids
The highest possible oxidation states of uranium and plutonium, respectively, are
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Actinoids

Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R :

Assertion A : Size of Bk3+ ion is less than Np3+ ion.

Reason R : The above is a consequence of the lanthanide contraction.

In the light of the above statements, choose the correct answer from the options given below :

EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Actinoids
Which statement is incorrect with reference to inner transition elements?
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Actinoids
Which atomic species cannot be used as a nuclear fuel?
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Actinoids
Knowing that the chemistry of lanthanides (Ln) is dominated by their +3 oxidation state, which of the following statements is incorrect?
HARD
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Actinoids
What is the role of radioactive isotopes in the mechanism of photosynthesis in plants ?
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Actinoids
The most basic hydroxide among the following is-
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Actinoids
Mischmetal is an alloy consisting mainly of :
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Actinoids
The lanthanide ion that would show colour is:
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Actinoids

Give reason: Actinoid contraction is greater from element to element than lanthanoid contraction.

EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Actinoids
Which of the following radioactive element is used in the treatment of cancer?
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Actinoids
In lanthanides, with increase in atomic number atomic radius decreases, except for the element X¯. What is X¯ ?