Methane an air pollutant is produced ___________
(A) by burning of coal in insufficient air
(B) by digestion of food by animals
(C) by action of ultraviolet light on nitrogenous compounds.
(D) as a by-product of manufacturing ammoniacal fertilizers
How are 'anions' formed?
(A) Addition of electron
(B) Removal of electron
(C) Addition of proton
(D) Removal of proton
Atomic number of which of the following elements is greater than that of Copper?
(A) Zinc
(B) Manganese
(C) Iron
(D) Chromium
What is the common name of CaoCl2?
(A) Washing Soda
(B) Bleaching Powder
(C) Baking Powder
(D) Baking Soda
Which energy is converted into electrical energy by a solar cell?
(A) Chemical Energy
(B) Nuclear energy
(C) Solar energy
(D) Magnetic energy
Which of the following has the least melting point?
(A) Carbon
(B) Silver
(C) Mercury
(D) Gold
In which state of matter, the distance between the molecules is minimum ?
(A) Solid
(B) Liquid
(C) Gas
(D) Plasma
Which of the following gases turn lime water milky?
(A) Carbon Dioxide
(B) Oxygen
(C) Nitrogen
(D) Hydrogen
The percentage of nitrogen present in ammonium sulphate is:
(A)
(B)
(C)
(D)
The stranger gas is also known as___________.
(A) Helium
(B) Argon
(C) Xenon
(D) Neon
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