Which is the main constituent in air ?
what is the valence of nitrogen?
Arrange by acidic values : phenol, nitrotolouene and o-cresol?
pH is having unit?
What causes smoke to curl up into the air ?
What are the constituents of cements?
Why does the snow on the mountains not melt all at once, not changed into water very slowly?
Explain substituted hydrocarbon?
What is Heat of Nutralication ?
Which is heavier, water or ice ?
Why do clothes dry quicker in wind than in still air ?
Give the others form of iron ore.
Explain the Isobars?