a Helium is preferred to hydrogen for filling balloons because it is i lighter than air ii almost as...

Question

a Helium is preferred to hydrogen for filling balloons because it is i lighter than air ii almost as light as hydrogen iii noncombustible iv inflammable b Reacting with water an active metal produces i oxygen ii nitric acid iii a base iv none of these c A metal oxide that is reduced by hydrogen is i A12O3 ii CuO iii Cao iv Na2O d Which of the following statements about hydrogen is incorrect i It is an inflammable gas ii It is the lightest gas iii It is not easily liquefied iv It is a strong oxidizing agent e For the reaction PbO H2 Pb H2O which of the following statements is wrong i H2 is the reducing agent ii PbO is the oxidizing agent iii PbO is oxidized to Pb iv H2 is oxidized to H2O f Which metal gives hydrogen with all of the following water acids alkalis i Fe ii Zn iii Mg iv Pb g Which of the following metals does not give hydrogen with acids i Iron ii Copper iii Magnesium iv Zinc

Accepted Answer

a noncombustible b base c CuO d It is a strong oxidizing agent e iii PbO is oxidized to Pb f ii Zn g ii Cu

Selina Solutions Class 9 Chemistry Solutions for Exercise 6D in Chapter 6 - Chapter 6 Study Of The First Element Hydrogen