Give a test to differentiate between two gas jars.
One containing pure hydrogen and the other hydrogen air mixture.

Give a chemical test to distinguish between the following pairs of compounds: Hydrogen chloride gas and hydrogen sulphide gas.

Give a chemical test to identify the following gases. Hydrogen

Give a chemical test to distinguish between the following pairs of compounds: carbon dioxide gas and hydrogen chloride gas.

Give a chemical test to identify the following gases. Hydrogen chloride

Give the two uses of Hydrogen peroxide.

Give reasons : A candle brought near the mouth of a jar containing hydrogen gas starts burning but is extinguished when pushed inside the jar.

In which of the following conditions, the distance between the molecules of hydrogen gas would increase ? (i) Increasing pressure on hydrongen contained in a closed container. (ii) Some hydrogen gas leaking out of the container. (iii) Increasing the volume of the contianer of hydrogen gas . (iv) Adding more hydrogen gas to the container without increasing the volume of the container.

Give a chemical test to distinguish between the pairs of compounds : Hydrogen chloride gas and Sulphur dioxide gas.

The speed of sound in hydrogen at N.T.P. is 1270 metres per second. Thenthe speed in a mixture of hydrogen and oxygen containing hydrogen and oxygen in the ration 4 : 1 by volume, will be

One can easily differentiate between a protonera of moss and a multicellular, filamentous green alga as the former does not contain chloroplast in the rhizoids and bears buds which give rise to erect, leafy gametophores.