Radiations which are harmful to the living organisms are? Mark as favorite Copy Link ultraviolet radiations micro waves Visible radiation. Infrared radiation. Check Answer
A solar water heater cannot be used to get hot water on? Mark as favorite Copy Link a windy day a hot day a cloudy day a sunny day Check Answer
The major constituent of biogas is methane.? Mark as favorite Copy Link A is false but R is true. A is true but R is false. Both A and R are true but R is not the correct explanation of (a) Both A and R are true and R is the correct explanation of (a) Check Answer
Biogas is formed in the? Mark as favorite Copy Link absence of air only presence of water and absence of air presence of water only presence of air only Check Answer
U-235 will undergo fission by? Mark as favorite Copy Link low energy protons only medium energy neutrons high energy neutrons only low energy neutrons only Check Answer
Acid rain happens because? Mark as favorite Copy Link earth atmosphere contains acids electrical charges are produced due to friction amongst clouds burning of fossil fuels releases oxides of carbon, nitrogen and sulphur in the atmosphere Sun heats up the upper layer of the atmosphere Check Answer
The major constituent of biogas is methane.? Mark as favorite Copy Link Both A and R are true but R is not the correct explanation of (a) Both A and R are true and R is the correct explanation of (a) A is false but R is true. A is true but R is false. Check Answer
the major problem in harnessing nuclear energy is how to? Mark as favorite Copy Link convert nuclear energy into electrical energy. sustain the reaction. split nuclei. dispose off spent fuel safely. Check Answer
Which of following is more environment friendly? Mark as favorite Copy Link burning of charcoal Burning of diesel burning of fire wood Burning of coal Check Answer
Which of the following is the ultimate source of energy? Mark as favorite Copy Link Uranium Fossil fuels Sun Water Check Answer