Aromatic hydrocarbons contain at least _____ benzene like ring in their molecules.
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Which of the following is not a component of Smog?
Which of the following statement is INCORRECT regarding Sodium?
___________ gases absorb long wave (infrared) radiation from the earth and emit it again towards the earth.
The volume of 10 g of gas X is 5.6 litre at NTP. What is the molecular weight of X?
Which of the following is not a Halon gas ?
Atomic Number of Hydrogen is _______.
Which of the following elements has the lowest melting point?