German silver an alloy does not contain the metal
1). Nickel
2). Zinc
3). Copper
4). Silver
1. One of the constituents of tear gas is
2. Which among the following elements is found in maximum percentage in the human body
3. When formaldehyde and potassium hydroxide are heated we get
4. In an oxygen molecule, two atoms are united by
6. The mass number of a nucleus is.
7. What is the most common salt in sea water ?
8. The major harmful gas emitted by automobile vehicle which causes air pollution is
9. The mass number of a nucleus is.
10. Which of the following is used to remove ink and rust stains on cloth?