1. Zn symbolises the metal ______________.
2. The symbol that represents tungsten is
______________.
3. The symbol U represents ______________.
4. The symbol I represents______________.
5. Steel is made stainless by adding ______________
to it.
6. Copper is denoted by the symbol
______________, and iron is denoted by ______________ .
7. Au is the symbol of ______________ ,
and Ag is the symbol of ______________ .
8. Ca is the symbol of ______________,
while ______________ is of carbon.
9. Lead is denoted by the symbol
______________ and Mercury is denoted by ______________ .
10. Potassium is denoted by the symbol
______________ and sodium by the symbol _____________.
11. ______________ is another name of
Mercury.
12. ______________ is the other name of sand.
13. Formula of heavy water is ______________
.
14. ______________ is used for filament of bulb.
15. Brass is the composition of
______________ & ______________ .
16. An Alloy Containing 60% Cu & 40% Ni
is ____________________.
17. A mixture of KNO3 having charcoal and
sulphur is ______________ .
18. Philosopher's wool is ______________ .
ANSWERS
1. Zinc,
2. W, 3. Uranium, 4. Iodine,
5. Chromium, 6. Cu, Fe, 7. Gold, Silver, 8. Calcium, C, 9. Pb, Hg,
10. K, Na, 11. Quick silver, 12. SiO2 , 13. D2O, 14.Tungsten, 15. Cu & Zn
16. constantan 17. Gun Powder 18. ZnO
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