Name the acid present in lemon.
1). Phosphoric acid
2). Carbonic acid
3). Citric acid
4). Malic acid
1. Atomic number of which of the following elements is greater than that of Copper?
2. Which one of the following is radioactive ?
4. Curd is sour due to presence of
6. An inert gas mixed with oxygen given to patients suffering from restricted breathing is
10. Which one of the following organic compounds has fruity smell?