a2zinterviews

1.	The most important ore of aluminium is
	A.  Galena
	B.  Calcite
	C.  Bauxite
	D.  Calamine

Answer

Ans: C Bauxite

2.	Oxidation involves
	A. Loss of electrons
	B. Gain of hydrogen
	C. Gain in electrons
	D. Combustion

Answer

Ans: A Loss of electrons

3.	Which of the following pairs does not contain a coinage metal?
	A.  Copper and Silver
	B.  Copper and Gold
	C.  Zinc and Gold
	D.  Silver and Gold

Answer

Ans: C Zinc and Gold

4.	Which one of the following is used in welding industry?
	A.  Benzene
	B.  Acetylene
	C.  Ethane
	D.  Methane

Answer

Ans: B Acetylene