Q. Marsh gas is ?

? Methane

Q. LPG consists of mainly ?

? Methane, Butane and Propane

Q. Balloons are filled with ?

? Helium

Q. Which of the following does not contain a coinage metal ?

? Zinc and Gold

Q. Which metal pollute the air of a big city ?

? Lead

Q. Which of the following is not an isotope of hydrogen ?

? Yttrium

Q. Which of the following is the lightest metal ?

? Lithium

Q. Which of the following metals remain in liquid for under normal conditions ?

? Mercury

Q. Potassium Permanganate is used for purifying drinking water, because ?

? It is an oxidising agent

Q. Which of the following is an element ?

? Diamond