A. Multiple choice type questions.

1 The first attempt to classify elements was made by
(a) Mendeleev
(b) Moseley
(c) Newland
(d) Dobereiner

2. Which group has maximum number of elements in the periodic table?
(a) 1
(b) 2
(c) 3
(d) 4

3. The law of octaves applies to
(a) B,C,N
(b) As, K, Ca
(c) Be, Mg, Ca
(d) Se, Te, As

4. Representative elements belong to groups
(a) 1, 2, 3,4, 5, 6, 7 and 8
(b) 1 and 2
(c) 1, 2, 13, 14, 15, 16, 17 and 18
(d) 1, 2, 13, 14, 15, 16 and 17

5. Which of the following ions is the largest in size?
(a) Al3+
(b) Ba2+
(c) Mg2+
(d) Na+