Write an experiment which shows that when we heat high quality coal (carbon content is more) a gas evolves which can burn.

Write the precautions to be taken in conducting an experiment showing the burning of gas released by heating a high quality coal. A)test tubes must be very hard,b) maintain distance from bunsen burner,c) heat the test tube by keeping in hand.

Which gas is released when acids react with carbonates-?

How do you show the quality coal evolves a gas?

Which gas is evolved when an acid reacts with metal ?

Which of the following gas is liberated, when sodium carbonate is reacted with Hydrochloric acid ?

The weight of an object is more at the poles than at the euator. At which of these can we get more sugar for the same weight ? State the reason for your answer.

Write an activity which proves certab,l bases produce hydrogen .gas when they react with metals.

BeO and Be(OH)_(2) are amphoteric while the oxides and hydroxides of other alkaline earth metals are basic. The solubility of hydroxides increases as we move down the group from Be to Ba but the solubility of sulphates and carbonates decreases in that order the thermal stability of carbonates and sulphates of alkaline earth metals increases from Be to Ba as we move from top to bottom in the group. Which of the following metal carbonates decompses on heating ?