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प्रश्न
Hydrogen is evolved when dilute HCl reacts with magnesium, but nothing happens in the case of mercury and silver. Explain.
उत्तर
Hydrogen is evolved when dilute HCl reacts with magnesium which is placed above hydrogen in the activity series. However, this does not occur for metals below hydrogen such as mercury and silver. This is because only metals that are more reactive than hydrogen can displace it from HCl.
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संबंधित प्रश्न
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Hydrogen can be used as a fuel.
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Describe two chemical properties of hydrogen with equations.
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valence electrons
State the following pertaining to the physical properties of hydrogen: Colour & odour
State the following pertaining to the physical properties of hydrogen: Solubility in water
With reference to the uses of hydrogen, give reason for the following:
A mixture of hydrogen & oxygen on burning, find application in welding & cutting metals.
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Ammonia - N2 + 3H2 ⇌ ______
Complete and balance the equation:
Hydrogen in metallurgy - reduction of
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