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.
(a) Suppose on hammering or beating the sample it converts into sheets, then it is a metal otherwise a non-metal because metals are malleable whereas non metals are not. If we use the battery, bulb, wires, and a switch to make up a circuit. If these samples conduct electricity, then it is a metal,Read more
(a) Suppose on hammering or beating the sample it converts into sheets, then it is a metal otherwise a non-metal because metals are malleable whereas non metals are not. If we use the battery, bulb, wires, and a switch to make up a circuit. If these samples conduct electricity, then it is a metal, otherwise a non-metal.
(b) As these tests are based on the physical properties. No chemical reactions occurs or are required in these tests. Therefore, the above tests are useful in distinguishing between metals and nonmetals.
Metals that are present at the top reactivity series are more reactive like potassium and sodium. So hydrogen displaced from dilute acids. Metals that are less reactive than hydrogen do not displace it that are present at the bottom of reactivity series like copper and silver.
Metals that are present at the top reactivity series are more reactive like potassium and sodium. So hydrogen displaced from dilute acids. Metals that are less reactive than hydrogen do not displace it that are present at the bottom of reactivity series like copper and silver.
While electrolytic refining of a metal M: Impure metal M will be taken as anode. Thin strips of pure metal M will be taken as cathode. Solution of salt of the metal M as electrolyte.
While electrolytic refining of a metal M:
Impure metal M will be taken as anode.
Thin strips of pure metal M will be taken as cathode.
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 lessWhy are food cans coated with tin and not with zinc?
(c) Zinc is more reactive than tin therefore food cans are coated with tin and not with zinc.
(c) Zinc is more reactive than tin therefore food cans are coated with tin and not with zinc.
See lessYou are given a hammer, a battery, a bulb, wires and a switch.
(a) Suppose on hammering or beating the sample it converts into sheets, then it is a metal otherwise a non-metal because metals are malleable whereas non metals are not. If we use the battery, bulb, wires, and a switch to make up a circuit. If these samples conduct electricity, then it is a metal,Read more
(a) Suppose on hammering or beating the sample it converts into sheets, then it is a metal otherwise a non-metal because metals are malleable whereas non metals are not. If we use the battery, bulb, wires, and a switch to make up a circuit. If these samples conduct electricity, then it is a metal, otherwise a non-metal.
(b) As these tests are based on the physical properties. No chemical reactions occurs or are required in these tests. Therefore, the above tests are useful in distinguishing between metals and nonmetals.
See lessWhat are amphoteric oxides? Give two examples of amphoteric oxides.
Those oxides that behave both as acidic and basic oxides are called amphoteric oxides. Examples: Aluminium oxide (Al2O3), zinc oxide (ZnO)
Those oxides that behave both as acidic and basic oxides are called amphoteric oxides.
Examples: Aluminium oxide (Al2O3), zinc oxide (ZnO)
Name two metals which will displace hydrogen from dilute acids, and two metals which will not.
Metals that are present at the top reactivity series are more reactive like potassium and sodium. So hydrogen displaced from dilute acids. Metals that are less reactive than hydrogen do not displace it that are present at the bottom of reactivity series like copper and silver.
Metals that are present at the top reactivity series are more reactive like potassium and sodium. So hydrogen displaced from dilute acids. Metals that are less reactive than hydrogen do not displace it that are present at the bottom of reactivity series like copper and silver.
See lessIn the electrolytic refining of a metal M, what would you take as the anode, the cathode and the electrolyte?
While electrolytic refining of a metal M: Impure metal M will be taken as anode. Thin strips of pure metal M will be taken as cathode. Solution of salt of the metal M as electrolyte.
While electrolytic refining of a metal M:
Impure metal M will be taken as anode.
Thin strips of pure metal M will be taken as cathode.
Solution of salt of the metal M as electrolyte.