CONCERNS ABOUT OUR ENVIRONMENT ~ PHYSICAL SCIENCE Chapter 1(class 10 wbbse) ( Important Short questions & Notes )
MADHYAMIK PHYSICAL SCIENCE SUGGESTION CONCERNS ABOUT OUR ENVIRONMENT ~ PHYSICAL SCIENCE 1) Mention one harmful effect of global warming. Ans. As a direct consequences, the polar ice caps will melt. So the water level in the oceans will rise and several coastal cities will submerge. 2) What is the main constitutent of Biogas? Ans. Methane 3) Name the fuel which has the highest calorific value. Ans.Hydrogen gas 4) In which zone of the atmosphere temperature increases with the increasing altitude? Ans. Stratosphere 5) What is meant by calorific or heating value of fuel ? Ans. The amount of heat generated on complete combustion of 1 kilogram fuel is called the heating value or calorific value of that particular fuel. It is generally expressed in Units of kilocalorie per kg or kilojoule per kg or kilojoule per gram etc. 6) Which atom , released from a chloroflurocarbon under the influence of UV rays, decomposes ozone i...