+2 Chemistry - Important one mark questions - Sixth Set - Part 1

Also covers some questions on CBSE syllabus..Have a good practice.                  

1. The wave nature of electron was proved by

(a) J.J.Thomson    (b) G.P.Thomson    (c) Niels Bohr  (d) Henry becquerel

2. The elements in which electron enter (n-1) d orbital are

(a) s-block             (b) d- block            (c) f-block              (d) p-block

3. The most abundant element among group 15 elements is

(a) N                      (b) As                    (c) Sb                    (d) P

4. Which of the following is not a halogen?

(a) O                     (b) S                      (c) Se                    (d) All of the above

5. Which of the following has largest radius?

(a) Mg²⁺                  (b) Na⁺                   (c) O^2-          (d) F ^-

6. Blister copper contains ----------- % copper

(a) 50%                  (b) 75%                  (c) 98%                   (d) 99.9%

7. Philosopher's wool is

(a) ZnCl₂                (b) ZnCO₃               (c) ZnO                  (d) ZnSO₄