1.Hydrogen diffuses 6 times faster than gas X. The molecular mass for X will be

2.Four soldered ampules of equal volumes contain nitrogen, ozone, chlorine and helium at ordinary conditions. The largest number of atoms will be found in the ampule containing

3.Two flasks of equal capacity contain argon and chlorine gases respectively at room temperature. What is true about them?

4.The behaviour of a real gas approaches ideal behaviour at

5.1 g of Zn was treated with each of excess of sulphuric acid and excess of NaOH separately. The ratio of the volumes of hydrogen evolved is