The vast amount of sea weeds present in oceans may produce an endless source of
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Valency of an element depends on which of the following?
I. Number of losing electron
II. Number of gaining electron
III. Number of sharing electron
The gravitational force of attraction between two bodies is ____________________ the distance between the two bodies.
What is the basis of classifying various plant tissues as meristematic tissue and permanent tissue?
What is the position of metallic ion and non-metallic ion in a chemical formula?
Select the missing term based on the given related pair.
An electron loses potential energy when it
Which of the following substances cause temporary hardness in water?
1. Mg(HCO3)2
2. Ca(HCO3)2
3. CaCl2
4. MgSO4
There are two types of water hardness: temporary and permanent hardness. Temporary hardness is due to the presence of calcium hydrogen carbonate Ca(HCO3)2(aq) and magnesium hydrogen carbonate Mg(HCO3)2(aq).