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प्रश्न
Classify the following as elements or compounds :
Iron, Iron sulphide, Sulphur, Chalk, Washing soda, Sodium, Carbon, Urea
उत्तर
| Elements | Compounds |
| Iron, sulphur, sodium, and carbon | Iron sulphide, chalk, washing soda, and urea |
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संबंधित प्रश्न
Intermolecular force of attraction is maximum in ............ less in .......... and the least in .............
Match the following
| Column A | Column B | ||
| (a) | Molecules | (i) | Water boils |
| (b) | 100° C | (ii) | Evaporation |
| (c) | 0° C | (iii) | Changes from solid to gas |
| (d) | At all temperatures | (iv) | Matter |
| (e) | Camphor | (v) | Water freezes |
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Fill in the following blanks with suitable words :
A heterogeneous mixture of liquid and solid is conveniently separated by...............
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