Terylene is a condensation polymer of ethylene glycol and which acid?
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___________ gases absorb long wave (infrared) radiation from the earth and emit it again towards the earth.
Which of the following is most important for absorption of heat radiated from the Sun as well as from the Earth?
Which of the following is a greenhouse gas or a gas which can deplete the ozone layer?
Which of the following elements has the lowest melting point?
What is the role of Pneumatophores?
Among plants, three different genera Solanum, Petunia and Datura are placed in which family?
What is the common name of the solution of calcium hydroxide?
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