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प्रश्न
Differentiate between elements and compounds.
फरक स्पष्ट करा
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उत्तर
| Elements | Compounds |
| An element is the simplest substance | A compound is a chemical substance formed by the combination of two or more elements |
| Elements combine to form compounds | Compounds can be split into elements |
| Atoms are the fundamental particle of an element | Molecules are the fundamental particles of a compound |
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संबंधित प्रश्न
Give one example for the following type of mixtures
solid-solid homogenous mixture.
Give two examples of Metals.
Give reason: Argon is filled in electric bulbs.
Fill in the blank
_________ refers to the number of atoms in the molecule of an element
Select the correct answer from the choice given below.
An impure substance
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 |
Select the correct answer from the choice given below to complete the sentence :
An example of a monoatomic molecule is ___________.
Give two example of elements.
Higher-Order Thinking questions:
Why is hydrogen considered an element?
Name the two elements which are derived from the country.
