AIEEE 2003 | d and f Block Elements Question 237 | Chemistry

For making good quality mirrors, plates of float glass are used. These are obtained by floating molten glass over a liquid metal which does not solidify before glass. The metal used can be :

tin

sodium

magnesium

mercury

AIEEE 2003

MCQ (Single Correct Answer)

-1

The radius of La³⁺ (Atomic number of La = 57) is 1.06 Å. Which one of the following given values will be closest to the radius of Lu³⁺ (Atomic number of Lu = 71) ?

1.60 Å

1.40 Å

0.85 Å

1.60 Å

AIEEE 2002

MCQ (Single Correct Answer)

-1

How do we differentiate between Fe³⁺ and Cr³⁺ in group III?

by taking excess of NH₄OH solution

by increasing $$NH_4^+$$ ion concentration

by decreasing OH^- ion concentration

both (b) and (c)