Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
+1 vote
27.0k views
in Chemistry by (79.8k points)

Assertion : La(OH)3 is more basic than Lu(OH)3.

Reason : Size of Lu3+ increases and shows less covalent character.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

1 Answer

+1 vote
by (83.4k points)
selected by
 
Best answer

The correct option is (c) A is true but R is false.

Explanation:

Due to lanthanide contraction, the size of Lu3+ is decreased, then, covalent character of hydroxides increases and hence the basic strength decreases. Thus, La(OH)3 is more ionic and thus more basic.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...