In ice, the number of hydrogen bonds per water molecule is
A). 1
B). 2
C). 4
D). 8
4
In ice, water can make a maximum of 4 hydrogen bond with the neighbouring water molecule.
1. Gunpowder consists of a mixture of
2. For every action, there is an equal and opposite reaction, is Newton's
3. In which of the following substances all carbon atoms are quaternary in nature ?
4. Ethanol containing 5% water is known as
5. Water is not effective in extinguishing a fire caused by petrol because
7. The three elements most needed in common fertilisers are :
8. Air is said to be saturated when :
9. The chiefsource for the production of nitrogeneous fertilizers is :