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प्रश्न
Statements given below are incorrect. Write the correct statements :
Chlorine gas is used in the manufacture of sulphuric acid.
उत्तर
Chlorine gas is used in the manufacture of hydrochloric acid.
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संबंधित प्रश्न
Can you store lemon pickle in an aluminium utensil? Explain.
Which property of copper and aluminium makes them suitable for making electric wires?
Name two metals which are used for making electric wires.
Name one property which is characteristic of metals.
Choose the acidic oxides, basic oxides and neutral oxides from the following:
Na2O; CO2; CO; SO2; MgO; N2O; H2O.
State any three differences between the physical properties of metals and non-metals.
The electronic configurations of three elements A, B and C are as follows:
| A | 2, 8, 1 |
| B | 2, 8, 7 |
| C | 2, 4 |
(a) Which of these element is a metal?
(b) Which of these elements are non-metals?
(c) Which two elements will combine to form an ionic bond?
(d) Which two elements will combine to form a covalent bond?
(e) Which element will form an anion of valency 1?
Name a metal as precious as gold
Name a metal used in making electric cables
Name a non-metal that is hardest naturally occurring substance
Give four differences between metals and non-metals with reference to their:
- Melting point and boiling point
- The conductivity of heat and electricity
- Malleability
- Solubility
Name:
a metal with low melting and boiling points
Name:
a metal which is a bad conductor of heat and electricity
Name:
a non-metal which is ductile
Select from the following ist:
`Fe_2O_3, , NO, PbO, Mn_2O_7`
Amphoteric oxide …………
Name:
a metal which is brittle
Give a reason why – properties of metals are related to their activity or reactivity series of metals. Explain the same with reference to potassium and iron in the series.
Give reason for the following:
Potassium reacts vigorously with cold water while copper does not react with water or steam.
_______ is good conductor of heat but bad conductor of electricity.
Diamond is a hard substance.
