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प्रश्न
Answer the following question:
What do you understand by the statement: ‘metals are ductile and malleable’?
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उत्तर
Metals are ductile, i.e., they can be drawn or stretched into thin wires.
They are malleable, i.e., they can be beaten into thin sheets.
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संबंधित प्रश्न
Give Two Examples for Each of the Following: Inert Gases
Fill in the blank
_________ refers to the number of atoms in the molecule of an element
Complete the statement given below by filling in the blank with the correct word.
The basic unit of an element is an __________.
Select the correct answer from the choice given below.
A group of atoms of elements
Match the compounds in List I – 1 to 20 with their correct formulas from in List II-A to T.
| List I | List II | ||
| 1 | Hydrochloric acid | A | NaCI |
| 2 | Potassium Hydroxide | B | NaOH |
| 3 | Sulphuric Acid | C | KCI |
| 4 | Zinc Hydroxide | D | Ca(OH)2 |
| 5 | Sodium Chloride | E | CaS |
| 6 | Nitric Acid | F | CuSO4 |
| 7 | Calcium Hydroxide | G | CaCO3 |
| 8 | Carbonic Acid | H | NH4CI |
| 9 | Sodium hydroxide | I | HCI |
| 10 | Copper sulphate | J | ZnO |
| 11 | Potassium Chloride | K | HNO3 |
| 12 | Calcium Carbonate | L | H2CO3 |
| 13 | Magnesium Sulphide | M | MgS |
| 14 | Zinc Sulphate | N | MgO |
| 15 | aluminium Hydroxide | O | KOH |
| 16 | Sodium Carbonate | P | ZnSO4 |
| 17 | Calcium Sulphide | Q | Na2CO3 |
| 18 | Magnesium Oxide | R | H2SO4 |
| 19 | Zinc Oxide | S | AI(OH)3 |
| 20 | Ammonium Chloride | T | Zn(OH)2 |
Write the names of elements from the following symbol:
Ir
Non-metal conducting electricity :______ :: Metal conducting electricity : Copper
Give an example of each mixture having the following characteristics. Suggest a suitable method to separate the components of this mixture
Two or more coloured constituents are soluble in some solvent.
______ is the life-giving element is the air.
Name the constituents of water.
