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प्रश्न
Complete the statement given below by filling in the blank with the correct word.
The basic unit of an element is an __________.
उत्तर
The basic unit of an element is an atom.
संबंधित प्रश्न
Fill in the blank
Chalk powder dissolved in water is an example of a Chalk powder dissolved in water is an example of a _________.
Give two examples of the following.
Non-metals which are lustrous
Fill in the blank
A metal which is a poor conductor of electricity is _______.
Tick (√) the correct alternative from the choice given for the following statement
The hardest naturally occurring substance
Give the name of the radical - OH
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:
Br
Write an answer to the following question in your own words.
Which elements (metals and non-metals), compounds and mixtures do we use in our day-to-day life?
Water contains _____ and _____ element.
Give an account of elements known to us.
