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Question:

Which of these statements is not true?

NO+is isoelectronic withO2.

In aqueous solution, theTl+ion is much more stable thanTI(III).

LiAlH4is a versatile reducing agent in organic synthesis.

Bis always covalent in its compounds.

Solution:

NO+has 14 electrons and O2 has 16 electrons. Therefore, they are not isoelectronic species. Boron is covalent in its compounds. Tl+ is much more stable than Tl3+ as going down the group the stability of lower oxidation number increases due to inert pair effect. LiAlH4 is a selective reducing agent in organic synthesis. Hence, option A is not true.