Elements, Metals and compounds

Q: The most important are of aluminum is:

(a) :  Calcite
(b) :  Bauxite
(c) :  Calamine
(d) :  Galena
(e) :  None of the Above
Answer:  Bauxite
Explanation:  

Q: Which of the following gases is not known as green housegas?

(a) :  Methane
(b) :  Nitrous oxide
(c) :  Carbon dioxide
(d) :  Hydrogen
(e) :  None of the Above
Answer:  Nitrous oxide
Explanation:  

Q: Which of the following is a non metal that remains liquid at room temperature?

(a) :  Helium
(b) :  Limestone
(c) :  Bromine
(d) :  Phosphorus
(e) :  None of the Above
Answer:  Bromine
Explanation:  

Q: Two or more forms of a chemical element having different physical properties but having identifiable chemical compounds are called:

(a) :  Allotropes
(b) :  Isotopes
(c) :  Isomers
(d) :  Isotones
(e) :  None of the Above
Answer:  Allotropes
Explanation:  

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