Mass number is always equal to ______.
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Water which is suitable for drinking is called _______________ water.
Match the following.
What is the general formula of alkenes?
Which of the following is NOT a waste material removed from blood in the kidney?
The most abundant of the rare gases i ?
Which of the following statement(s) is/are INCORRECT?
I. Alkenes are fairly unreactive.
II. Alkenes burn with blue flame.
III. Alkanes burn with yellow flame.
Which of the following statements about the reaction below are INCORRECT?
2Pb + C → 2Pb + CO2
A. Carbon di-oxide is getting, oxidisedB. Lead is getting reducedC. Carbon is oxidisedD. Lead oxide is getting reduced