Advertisements
Advertisements
प्रश्न
Differentiate between metal and non-metal on the basis of their chemical properties.
Advertisements
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. |
APPEARS IN
संबंधित प्रश्न
.................... liberated when acetic acid reacts with sodium metal.
(a) Hydrogen
(b) Chlorine
(c) Oxygen
(d) Nitrogen
The solution of Aluminium sulphate in water is .....................
(a) Green
(b) Colourless
(c) Pink
(d) Blue
Name the metal which has been placed at the top of the reactivity series.
Fill in the following blank with suitable word:
The white powder formed when magnesium ribbon burns in oxygen is of ....................
With the help of examples, describe how metal oxides differ from non-metal oxides.
Write the chemical equation of the reaction which takes place when iron reacts with dilute sulphuric acid. What happens when the gas produced is ignited with a burning matchstick?
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.
Write the equation for the reaction of Aluminium with dilute hydrochloric acid.
Name the products formed. Also indicate the physical states of all the substances involved.
The least reactive metal among the following is:
(a) sodium
(b) silver
(c) copper
(d) lead
An element X forms two oxides XO and XO2. The oxide XO is neutral but XO2 is acidic in nature. The element X is most likely to be:
(a) sulphur
(b) carbon
(c) calcium
(d) hydrogen
A metal less reactive and another metal more reactive than hydrogen are:
(a) aluminium and lead
(b) iron and magnesium
(c) copper and tin
(d) copper and mercury
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)
When calcium metal is added to water, the gas evolved does not catch fire but the same gas evolved on adding sodium metal to water catches fire. Why is it so?
A zinc plate was kept in a glass container having CuSO4 solution. On examining it was found that the blue colour of the solution is getting lighter and lighter. After a few days, when the zinc plate was taken out of the solution, a number of small holes were noticed in it. State the reason and give chemical equation of the reaction involved.
Write the name and formula of a molecule made up of three atoms of oxygen.
Write the chemical equation for the following reaction:
Cinnabar is heated in the presence of air.
Which property of metals is used for making bells and strings of musical instruments like Sitar and Violin?
An element X is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in the air. It reacts vigorously with water. Identify the element from the following.
Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
- Good thermal conductivity
- Good electrical conductivity
- Ductility
- High melting point
Which of the following property is not responsible for copper to be used as electrical conduction wires?
