[" Given "PbO,ZnO,Al_(2)O_(3),SnO,SnO_(2),FeO,CuO" .How "],[" many of the following oxides which "],[" dissolves in "NaOH" solution is ".................]

BeO,Al_(2)O_(3),SnO_(2),SiO_(2),Sb_(2)O_(3),PbO are __ oxides

Which of the following will not dissolve in a hot mixture of NaOH and H_(2)O_(2) ?

w SnO_(2) + x H_(2) to y Sn + z H_(2) O For which of the following values of w, x, y and z will the equation above be balanced?

For given oxides calculate (("X"+"Y"))/(2) FeO,Cr_(2)O_(3),MnO,ZnO,CO,Na_(2)O,Al_(2)O_(3), PbO_(2) ,BaO where : X= Number of oxides which reacts only with acid Y= Number of neutral oxides "]

When solid SnO_2 is added to an aqueous solution of NaOH, the

Which of the following oxides are acidic ? CuO, Mn_(2)O_(7), CO, SO_(2), CrO_(3)

How many of the following are amphoteric oxides? Li_(2)O,Na_(2)O_(2),BeO,Al_(2)O_(3),MgO,BaO_(2)