Metals, Non-Metals and Noble Gases

Q: Which is used in arc welding and cutting?

(a) :  He
(b) :  Ne
(c) :  Ar
(d) :  Kr
(e) :  None of the Above
Answer:  Ar

Q: Sulphuric acid is used as:

(a) :  Oxidizing agent
(b) :  Dehydrating agent
(c) :  Acid
(d) :  All
(e) :  None of the Above
Answer:  All

Q: Below the following statements about chemical behaviour of metallic elements which is incorrect?

(a) :  Metals are reducing agents
(b) :  They form basic oxide
(c) :  They exibit higher-electronegativities than non-metals
(d) :  They generally have one to five electrons in their outer most shell
(e) :  None of the Above
Answer:  They exibit higher-electronegativities than non-metals
Explanation:  Non-metals show higher electronegativities. Metals readily donate electrons than non-metals.

Q: Which phosphorus is the most poisonous:

(a) :  White
(b) :  Red
(c) :  Black
(d) :  All
(e) :  None of the Above
Answer:  White

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