Please select a subject first
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Write a correctly balanced equation for the following “word equation”:
calcium + water → calcium hydroxide + hydrogen
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When steam is passed over red-hot iron, magnetic oxide of iron and hydrogen are obtained. “The reaction between steam and red-hot iron is a Reversible Reaction.” What is meant by this statement.
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How can you obtain hydrogen from sodium hydroxide [not by electrolysis].
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Write balanced equation for the following reaction:
magnesium + dil. hydrochloric acid → ___
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Name a gas which burns in air or oxygen forming water.
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Write a correctly balanced equation for the following:
When steam is passed over red hot iron.
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Explain the following:
Two jars of H2 are collected – “one burns quietly and the other does not”.
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Write correctly the balanced equation for the following:
‘When zinc filings are added to a concentrated solution of sodium hydroxide’.
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Describe one chemical test applied to the following gases, which would enable you to distinguish between them :‘carbon monoxide and hydrogen’.
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Write down the “word equation” for the following reaction:
sodium hydroxide solution + zinc → ?
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What do you observe when a piece of sodium is dropped into cold water?
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How would you obtain ‘hydrogen from sodium hydroxide’ solution other than by electrolysis?
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Complete and balance the following equations:
Al + NaOH + ____ → ____ + ____
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What do the following symbols represent : 2H and H2.
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Write balanced equation of the reaction in the preparation of : hydrogen from a solution of potassium hydroxide [other than by electrolysis].
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Describe briefly, with equations, the Bosch Process for the large scale production of hydrogen.
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Give balanced equation for obtaining hydrogen from cold water using a monovalent active metal.
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Give balanced equation for obtaining hydrogen from cold water using a divalent active metal.
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Give a reason for the following.
A mixture of hydrogen and chlorine can be separated by passage through a porous pot.
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Select the correct answer from the symbol in the bracket.
The element, which like hydrogen has one valence electron.
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