The Chemical formula of Ammonium dichromate is _____.
1). (NHF4)2Cr2O7
2). (NH4)CrO3
3). (NH4)Cr2O3
4). (NH4)2Cr2O3
1. Threshold limit value of copper in the atmospheric air is
2. Domestic cooking gas consists mostly of
3. The hardest form of carbon is
4. Which of the following imparts deep blue colour to glass
5. The element which is used for vulcanizing rubber
7. Which colour is produce by Arsenic during flame test?
8. The natural resource known as black gold is
9. Question 3.28:The increasing order of reactivity among group 1 elements is Li
10. When there are two electrons in the same orbital they have: