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प्रश्न
Differentiate between metal and non-metal on the basis of their chemical properties.
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उत्तर १
| Metal | Non-metal |
| Metals are electropositive. | Non-metals are electronegative. |
| Oxides of metal are basic in nature. | Oxides of non-metals are acidic in nature. |
| Metals displace hydrogen from dilute acids. | They can’t replace hydrogen from dilute acids. |
| Metals form chlorides which are electrovalent or ionic compounds. | Non-metals form chlorides which are covalent compounds. |
| They react with water to form oxides and hydroxides. Some metals react with cold water, some with hot water, and some with steam. | They do not react with water. |
उत्तर २
| Chemical properties | Metals | Non-metals | |
| (i) | Reaction with oxygen | Metals react with oxygen to form basic oxides. | Non-metals react with oxygen to form acidic or neutral oxides. |
| (ii) | Reaction with water | Metals react with water to form metal hydroxide and hydrogen gas | Non-metals do not react with water. |
(iii) |
Reaction with dilute acid | Metals react with dilute acids to form metal salts and they displace hydrogen from acids. | Non-metals do not react with dilute acids. |
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संबंधित प्रश्न
‘E’ is an element which reacts with oxygen to form an oxide E2O. An aqueous solution of E2O turns red litmus blue, so:
i. What is the nature of oxide E2O ?
ii. Write the name of element ‘E’.
Write the chemical reaction when iron reacts with dilute H2SO4.
Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).
A student added few pieces of aluminium metal to two test tubes A and B containing aqueous solutions of iron sulphate and copper sulphate. In the second part of her experiment, she added iron metal to another test tubes C and D containing aqueous solutions of aluminium sulphate and copper sulphate.
In which test tube or test tubes will she observe colour change? On the basis of this experiment, state which one is the most reactive metal and why.
Name the metal which has been placed at the bottom of the reactivity series.
How would you show that silver is chemically less reactive than copper?
Fill in the following blank with suitable word:
The white powder formed when magnesium ribbon burns in oxygen is of ....................
Fill in the following blank with suitable word:
Calcium is a ................. reactive metal than sodium.
How do non-metals react with hydrogen? Explain with an example.
Which gas is produced when dilute hydrochloric acid is added to a reactive metal?
Give one example, with equation, of the displacement of hydrogen by a metal from an acid.
Write the equation for the reaction of Magnesium with dilute hydrochloric acid.
Name the products formed. Also indicate the physical states of all the substances involved.
What is meant by the reactivity series of metals? Arrange the following metals in an increasing order of their reactivities towards water:
Zinc, Iron, Magnesium, Sodium
An element is soft and can be cut with a knife. If is very reactive and cannot be kept open in the air. It reacts vigorously with water. The element is most likely to be:
(a) Mg
(b) S
(c) P
(d) Na
Which of the following pair of reactants can undergo a displacement reaction under appropriate conditions?
(a) MgSO4 + Fe
(b) ZnSO4 + Fe
(c) MgSO4 + Pb
(d) CuSO4 + Fe
Metal A burns in air, on heating, to form an oxide A2O3 whereas another metal B burns in air only on strong heating to form an oxide BO. The two oxides A2O3 and BO can react with hydrochloric acid as well as sodium hydroxide solution to form the corresponding salts and water.
(a) What is the nature of oxide A2O3?
(b) What is the nature of oxide BO?
(c) Name one metal like A.
(b) Name one metal like B.
Which of the following reactions will not occur? Why not?
(a) MgSO4 (aq) + Cu (s) → CuSO4 (aq) + Mg (s)
(b) CuSO4 (aq) + Fe (s) → FeSO4 (aq) + Cu (s)
(c) MgSO4 (aq) + Fe (s) → FeSO4 (aq) + Mg (s)
Write the chemical equation for the following reaction:
Manganese dioxide is heated with aluminum powder.
Which property of metals is used for making bells and strings of musical instruments like Sitar and Violin?
