Correct Answer : Spiral
Correct Answer : Methane and carbon dioxide
Biogas is principally a mixture of methane (CH₄) and carbon dioxide (CO₂) along with other trace gases. Biogas can be collected from landfills, covered lagoons, or enclosed tanks called anaerobic digesters.
Correct Answer : Heavy Water
Heavy water (D₂O), also called deuterium oxide, water composed of deuterium, the hydrogen isotope with a mass double that of ordinary hydrogen, and oxygen.
Correct Answer : Argon
It is extracted from crude oil and natural gas. LPG is composed hydrocarbons containing three or four carbon atoms. The normal components of LPG thus, are propane (C3H8) and butane (C4H10).
Correct Answer : Carbon Dioxide
The bubbles in fizzy drinks are caused by carbon dioxide (CO₂). Carbon dioxide is a colourless odourless gas that dissolves in water under pressure. The carbon dioxide forms a very weak carbonic acid, (H₂C0₃) which causes the tingly sensation on your
Correct Answer : Nitrogen
Argon is a commonly used gas, used to fill incandescent light bulbs. It increases the bulb life by preventing the tungsten filament from deteriorating too quickly. Other gases such as helium, neon nitrogen and krypton are also used in lightning.
Correct Answer : Edward Teller
Edward Teller, the 'father of the H-bomb', has died aged 95. Teller was one of the most controversial figures to emerge from the US nuclear-weapons programme instigated during the Second World War.
Correct Answer : Birla Planetarium, Kolkata
Situated at Chowringhee Road adjacent to the Victoria Memorial, St. Paul's Cathedral, and the Maidan in South Kolkata, it is the largest planetarium in Asia and the second largest planetarium in the world and First in India.
Correct Answer : A crevasse
A crevasse is simply a deep crack in a glacier or ice sheet.
Correct Answer : Sludge
