From which substance are the dues manufactured ?
what is the formula of petrol
What makes a molecule into organic molecule?
Explain the Properties of Gases ?
who invented the first projector?
Explain the Matter?
How are pka and strength of a weak acid related?
State beer’s law.
Why white clothe are preferred to dark ones in summer ?
If you are given two liquids, which look like water, how can you, by two physical tests, prove which one of them may be water ?
Give the others form of iron ore.
What is produced, when carbon is burnt ?
Why does the snow on the mountains not melt all at once, not changed into water very slowly?