Which of the following green house gases has the greatest heat-trapping ability?
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Which is the warmest layer of the atmosphere?
The 7th pay commission has retained the rate of annual increment of _____.
In nuclear reactor, cadmium rods are used as which of the following?
Which of these monuments enshrines the tomb containing the relics of St. Francis Xavier?
Which of the following is the treatment of water pollution?
An earthquake of magnitude 6 on Richter scale has ______________ times more destructive energy than an earthquake of magnitude 4.
A sound of single frequency is called a