In extraction of copper, the flux used is? Mark as favorite Copy Link FeSiO3 FeO SiO2 CaO Check Answer
Which of the following is the correct arrangement of the given metals in ascending order of their reactivity Zinc, Iron, Magnesium, Sodium? Mark as favorite Copy Link Sodium > Magnesium > Zinc > Iron Sodium > Zinc > Magnesium > Iron Zinc > Iron > Magnesium > Sodium Sodium > Magnesium > Iron > Zinc Check Answer
Annealing is done to? Mark as favorite Copy Link increase brittleness increase Transparancy decrease brittleness increase refractive inded Check Answer
Soda Acid for extinguisher contains? Mark as favorite Copy Link sodium chloride and sulphuric acid sodium carbonate and carbonic acid sodium carbonate and nitric acid sodium hydrogen carbonate and sulphuric acid Check Answer
Which one of the following is used for making pencil lead? Mark as favorite Copy Link Diamond Graphite Sulphur None Check Answer
Which of the following metal cannot displaced hydrogen? Mark as favorite Copy Link Gold Silver Copper All of these Check Answer
Hard glass is prepared by? Mark as favorite Copy Link fusing a mixture of potassium carbonate and any oxide fusing a mixture of sodium carbonate, calcium carbonate and silica fusing a mixture of potassium carbonate, calcium carbonate and silica none of the above Check Answer
What is obtained on adding lime to H2O? Mark as favorite Copy Link lime limestone slaked lime quicklime Check Answer
Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam? Mark as favorite Copy Link Fe3O4 FeO Fe2O3 Fe2O3 and Fe2O4 Check Answer
The atomic number of an element ‘X’ is 12. Which inert gas is nearest to X? Mark as favorite Copy Link Kr He Ar Ne Check Answer