Atomic number of which of the following elements is greater than that of Magnesium
1). Neon
2). Fluorine
3). Sodium
4). Aluminium
1. Which base is present in soap?
2. What is the principal ore of aluminium ?
4. Which halide is used in making sensitive emulsion on photograhic film?
5. J.J. Thomson’s proposed model of atom is generally called ________ model.
6. Entropy of Universe is always
9. Which one of the following organic compounds has fruity smell
10. The most electronegative element among the following is-