Elements, Metals and compounds

Q: The gas used to extinguish fire is:

(a) :  Neon
(b) :  Nitrogen
(c) :  Carbon dioxide
(d) :  Oxygen
(e) :  None of the Above
Answer:  Carbon dioxide
Explanation:  

Q: Which of the following metals form an amalgum with other metals?

(a) :  Lead
(b) :  Tin
(c) :  Zinc
(d) :  Mercury
(e) :  None of the Above
Answer:  Mercury
Explanation:  

Q: The average salinity of sea water is :

(a) :  0.02
(b) :  0.035
(c) :  0.055
(d) :  0.07000000000000001
(e) :  None of the Above
Answer:  0.035
Explanation:  

Q: Which of the following is not a compound?

(a) :  Silica
(b) :  Black lead
(c) :  Red lead
(d) :  Slaked lime
(e) :  None of the Above
Answer:  Black lead
Explanation:  

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