The anode in a dry cell consists of 

If the pH value of a substance is lower than 7, it would be considered as–

Which of the following energy is most used in organic quantities?

Which acid is used in lemons? 

Curie is the unit of: 

Which of the following is the strongest hydracid known?

Chemically " Plaster of Paris " is – 

In 1931, who recognised that an aromatic compound must have an odd number of pairs of electrons, which can mathematically be written as 4n+2 (n = 0,1,2,3 etc.)?