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हँसना एक अकर्मक क्रिया है। जिस क्रिया का फल कर्ता पर ही पड़ता है वह क्रिया अकर्मक क्रिया कहलाती हैं।
Which polymer is formed by the copolymerization of phenol and formaldehyde?
During which operating conditions of an automobile is carbon monoxide content in exhaust gas maximum?
The percentage of nitrogen in urea is :
The common name of hydrogen peroxide is:
What is the permissible concentration of residual chlorine present in drinking water in mg/L?
Which of the following element has the highest melting point?
Aromatic hydrocarbons contain at least how many benzene rings in their molecules?
Which of the following is the product when CH₃CHO is reduced?
A radioactive substance emits?
_____ is the movement of chemicals in the upper layers of soil into lower layers or into groundwater by being dissolved in water.
