(a) With the hammer, we can beat the sample and if it can be beaten into thin sheets (that is, it is malleable), then it is a metal otherwise a non-metal. Similarly, we can use the battery, bulb, wires, and a switch to set up a circuit with the sample. If the sample conducts electricity, then it isRead more
(a) With the hammer, we can beat the sample and if it can be beaten into thin sheets (that is, it is malleable), then it is a metal otherwise a non-metal. Similarly, we can use the battery, bulb, wires, and a switch to set up a circuit with the sample. If the sample conducts electricity, then it is a metal otherwise a non-metal.
(b) The above tests are useful in distinguishing between metals and non-metals as these are based on the physical properties. No chemical reactions are involved in these tests.
(c) Food cans are coated with tin and not with zinc because zinc is more reactive than tin. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-3/
(c) Food cans are coated with tin and not with zinc because zinc is more reactive than tin.
(c) Applying a coating of zinc (We can also apply grease and paint to prevent iron from rusting. However, in case of iron frying pan, grease and paint cannot be applied because when the pan will be heated and washed again and again, the coating of grease and paint would get destroyed.) For more answRead more
(c) Applying a coating of zinc
(We can also apply grease and paint to prevent iron from rusting. However, in case of iron frying pan, grease and paint cannot be applied because when the pan will be heated and washed again and again, the coating of grease and paint would get destroyed.)
What are amphoteric oxides? Give two examples of amphoteric oxides.
Examples: aluminium oxide (Al₂O₃) Al₂O₃ + 6HCl → 2AlCl3 + 3H₂O [ Basic ] Al₂O₃ + 2NaOH → 2NaAlO₂ + H₂O [ Acidic ] Zinc oxide (ZnO) is also an amphoteric oxide. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-3/
Examples: aluminium oxide (Al₂O₃)
Al₂O₃ + 6HCl → 2AlCl3 + 3H₂O [ Basic ]
Al₂O₃ + 2NaOH → 2NaAlO₂ + H₂O [ Acidic ]
Zinc oxide (ZnO) is also an amphoteric oxide.
For more answers visit to website:
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You are given a hammer, a battery, a bulb, wires and a switch.
(a) With the hammer, we can beat the sample and if it can be beaten into thin sheets (that is, it is malleable), then it is a metal otherwise a non-metal. Similarly, we can use the battery, bulb, wires, and a switch to set up a circuit with the sample. If the sample conducts electricity, then it isRead more
(a) With the hammer, we can beat the sample and if it can be beaten into thin sheets (that is, it is malleable), then it is a metal otherwise a non-metal. Similarly, we can use the battery, bulb, wires, and a switch to set up a circuit with the sample. If the sample conducts electricity, then it is a metal otherwise a non-metal.
(b) The above tests are useful in distinguishing between metals and non-metals as these are based on the physical properties. No chemical reactions are involved in these tests.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-3/
Why are food cans coated with tin and not with zinc?
(c) Food cans are coated with tin and not with zinc because zinc is more reactive than tin. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-3/
(c) Food cans are coated with tin and not with zinc because zinc is more reactive than tin.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-3/
An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be
(a) The element is likely to be calcium. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-3/
(a) The element is likely to be calcium.
For more answers visit to website:
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Which of the following methods is suitable for preventing an iron frying pan from rusting?
(c) Applying a coating of zinc (We can also apply grease and paint to prevent iron from rusting. However, in case of iron frying pan, grease and paint cannot be applied because when the pan will be heated and washed again and again, the coating of grease and paint would get destroyed.) For more answRead more
(c) Applying a coating of zinc
(We can also apply grease and paint to prevent iron from rusting. However, in case of iron frying pan, grease and paint cannot be applied because when the pan will be heated and washed again and again, the coating of grease and paint would get destroyed.)
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-3/