Question

Which one of the following cannot exist independently?

(a) He
(b) H SO
2 4

(c) H
2

2-
(d) SO
4

Which poluatomic ion does NaNO
3 contain?


(a) carbonate
(b) nitrite
(c) sodium
(d) nitrate

Which of the following is a metalloid?

(a) tin
(b) germanium
(c) platinum
(d) all of these

Which of the following metal can be cut with a knife?

(a) cobalt
(b) iron
(c) sodium
(d) silver


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Answer 1

Answer:

1. SO42-

2.nitrate

3.germanium

4.sodium