Elements, Metals and compounds

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 the basic of modern periodic tables?

(a) :  Atomic number
(b) :  Atomic Size
(c) :  Nickel and silver
(d) :  None of these
(e) :  None of the Above
Answer:  Atomic number
Explanation:  

Q: Bleaching powder is made from:

(a) :  Sulphur dioxide
(b) :  lime and Chlorine
(c) :  Bauxite
(d) :  Soda ash and lime
(e) :  None of the Above
Answer:  lime and Chlorine
Explanation:  

Q: Sodium metal is kept under:

(a) :  Alcohol
(b) :  Water
(c) :  Petrol
(d) :  kerosene
(e) :  None of the Above
Answer:  kerosene
Explanation:  

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