Metals (i) Metals form basic oxides or amphoteric oxides. (ii) Metals replace hydrogen from acids and form salts. (iii) With chlorine, metals form chlorides which are electrovalent. (iv) With hydrogen few metals form hydrides which are electrovalent. Non-metals (i) Non-metals form acidic or neutralRead more
Metals
(i) Metals form basic oxides or amphoteric oxides.
(ii) Metals replace hydrogen from acids and form salts.
(iii) With chlorine, metals form chlorides which are electrovalent.
(iv) With hydrogen few metals form hydrides which are electrovalent.
Non-metals
(i) Non-metals form acidic or neutral oxides.
(ii) Non-metals do not replace hydrogen from acids.
(iii) With chlorine, non-metals form chlorides which are covalent.
(iv) With hydrogen, non-metals form many stable hydrides which are covalent.
(c) Applying a coating of zinc Rusting can be prevented by applying grease and oil. But, in case of an iron frying pan, grease and paint cannot be applied because when the pan is heated and washed again and again, the coating of grease and paint gets destroyed. Therefore Zinc coating is done i.e. gaRead more
(c) Applying a coating of zinc
Rusting can be prevented by applying grease and oil. But, in case of an iron frying pan, grease and paint cannot be applied because when the pan is heated and washed again and again, the coating of grease and paint gets destroyed. Therefore Zinc coating is done i.e. galvanisation to prevent rusting.
What does an electric circuit mean?
A continuous and closed path along which an electric current flows is called an electric circuit.
A continuous and closed path along which an electric current flows is called an electric circuit.
See lessDifferentiate between metal and non-metal on the basis of their chemical properties.
Metals (i) Metals form basic oxides or amphoteric oxides. (ii) Metals replace hydrogen from acids and form salts. (iii) With chlorine, metals form chlorides which are electrovalent. (iv) With hydrogen few metals form hydrides which are electrovalent. Non-metals (i) Non-metals form acidic or neutralRead more
Metals
(i) Metals form basic oxides or amphoteric oxides.
(ii) Metals replace hydrogen from acids and form salts.
(iii) With chlorine, metals form chlorides which are electrovalent.
(iv) With hydrogen few metals form hydrides which are electrovalent.
Non-metals
(i) Non-metals form acidic or neutral oxides.
(ii) Non-metals do not replace hydrogen from acids.
(iii) With chlorine, non-metals form chlorides which are covalent.
(iv) With hydrogen, non-metals form many stable hydrides which are covalent.
See lessWhich of the following pairs will give displacement reactions?
(d) AgNO3 solution and copper metal. As copper is more reactive than silver it displaces silver from silver nitrate solution.
(d) AgNO3 solution and copper metal.
As copper is more reactive than silver it displaces silver from silver nitrate solution.
See lessWhich of the following methods is suitable for preventing an iron frying pan from rusting?
(c) Applying a coating of zinc Rusting can be prevented by applying grease and oil. But, in case of an iron frying pan, grease and paint cannot be applied because when the pan is heated and washed again and again, the coating of grease and paint gets destroyed. Therefore Zinc coating is done i.e. gaRead more
(c) Applying a coating of zinc
Rusting can be prevented by applying grease and oil. But, in case of an iron frying pan, grease and paint cannot be applied because when the pan is heated and washed again and again, the coating of grease and paint gets destroyed. Therefore Zinc coating is done i.e. galvanisation to prevent rusting.
See lessAn element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be
(a) The element is calcium. Because calcium oxide is an ionic compound, as these compounds have a high melting point.
(a) The element is calcium.
Because calcium oxide is an ionic compound, as these compounds have a high melting point.
See less