A student on adding a solution X to rice extract, observed the conversion of colour of solution to blue black. Identify the compound X.
(a) Bromine solution (b) Iodine solution (c) Distilled water (d) Salt solution
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A student while observing a human cheek cell could not observe — (a) Nucleus (b) Mitochondria (c) Nucleolous (d) Chloroplast
1. The compound X is 'Iodine solution'. (Rice extract contains starch which on reaction with iodine solution turns to blue black colour).
2. A student while observing a human cheek cell could not observe 'chloroplast'. (Chloroplast is found in plant cells only)