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प्रश्न
Name two metals which are found in nature mainly in the free state (as metallic elements).
उत्तर
Gold (Au) and silver (Ag) are found in nature in free state. This is because they are non-reactive metals.
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संबंधित प्रश्न
Give reasons.
Aluminium is a highly reactive metal, yet it is used to make utensils for cooking.
Why are the metals like Na, K, Ca and Mg never found in their free state in nature?
Why does aluminium not corrode right through?
Define the terms gangue.
Name three other metals which are extracted in a manner similar to sodium.
In an electrolytic tank, aluminium metal is being extracted by the electrolysis of molten aluminium oxide using carbon electrodes. It is observed that one of the carbon electrodes is gradually burnt away and has to be replaced.
(a) Which carbon electrode (cathode or anode) is burnt away?
(b) Why is this carbon electrode burnt away?
Give reasons, why aluminum is used in:
In aluminiothermy
Complete the incomplete statement with missing word:
Metals are malleable while non-metals are ______.
Write the molecular formulae of the following compound.
Sodium aluminate
Read the following passage and answer the questions.
According to the reactivity series, zinc is more reactive than iron, iron is more reactive than silver. During study of this, a student dipped the iron nails in silver nitrate solution.
- What is reactivity series?
- What will happen when iron nails are dipped in silver nitrate solution?
- Which type of reaction happens when iron metal reacts with silver nitrate solution?
- What will happen if a zinc rod is used instead of iron nail?
