NEET-UG and JEE Main Chemistry · Class 12
Actinoids - configuration and oxidation states — NEET & JEE Questions
Actinoids - configuration and oxidation states is a topic in d- and f-Block Elements, a Class 12 Chemistry chapter of the NEET-UG and JEE Main syllabus. TestBudy holds 12 published NEET-UG and JEE Main questions on Actinoids - configuration and oxidation states, each with the marking scheme of the real paper.
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Actinoids - configuration and oxidation states MCQs with solutions
10 of the 12 published questions on this topic, exactly as they appear in a test. Answers and worked solutions come with your result rather than on this page.
Actinoids involve progressive filling primarily of the
- A. 5f subshell
- B. 4f subshell
- C. 3d subshell
- D. 6p subshell
Actinoids generally show a wider range of oxidation states than lanthanoids because
- A. 5f, 6d and 7s orbitals are relatively close in energy
- B. their f electrons are completely inert
- C. they have no valence s electrons
- D. only one electron can participate in bonding
The most common oxidation state across the actinoid series is
- A. +3
- B. +1
- C. +7 only
- D. 0 only
Compared with lanthanoids, actinoids generally show
- A. greater variability in oxidation states
- B. only the +3 state
- C. no radioactive members
- D. no covalent bonding tendency
Which subshell is being filled across Th to Lr in the actinoid series?
- A. 5f
- B. 4f
- C. 3d
- D. 5p
Which oxidation state is especially characteristic of uranium in compounds in addition to lower states?
- A. +6
- B. +1
- C. -1 only
- D. +2 only
Why do early actinoids such as U and Np show several oxidation states?
- A. Their 5f, 6d and 7s electrons can have comparable participation in bonding
- B. Their inner shells are completely inaccessible
- C. They possess filled 5f shells
- D. They cannot form covalent bonds
Which statement is most reasonable for later actinoids?
- A. The +3 oxidation state becomes increasingly important
- B. Only +7 remains stable
- C. All oxidation states disappear
- D. They behave exactly like noble gases
An actinoid ion forms by loss of two 7s electrons and one additional valence electron. Which oxidation state is most directly suggested?
- A. +3
- B. +2
- C. +1
- D. +5
Which comparison best reflects 5f and 4f chemistry?
- A. 5f orbitals are generally more available for bonding than 4f orbitals, contributing to greater actinoid oxidation-state variability
- B. 4f orbitals participate far more strongly in bonding than 5f
- C. Neither 4f nor 5f electrons ever affect chemistry
- D. Actinoids are d-block rather than f-block elements
Common mistakes in Actinoids - configuration and oxidation states
Recorded against questions in this topic that are not shown above, so none of these points at an answer you can see on this page.
- Uses the +3 state alone and ignores the unusually broad set of higher oxidation states.
- Recognises +3 but ignores the diagnostic presence of several stable higher oxidation states.
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