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प्रश्न
What is the action of water on sodium? Write the equation of the chemical reactions involved.
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उत्तर
Sodium reacts vigorously with cold water, forming sodium hydroxide and hydrogen gas.
\[\ce{\underset{Sodium}{2Na_{(s)}} + \underset{(Cold)}{\underset{Water}{2H2O_{(l)}}} -> \underset{Sodium hydroxide}{2NaOH_{(aq)}} + \underset{Hydrogen}{H2_{(g)}} + Heat}\]
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संबंधित प्रश्न
Iron is
(a) More reactive than zinc
(b) More reactive than aluminium
(c) Less reactive than copper
(d) Less reactive than aluminium
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The reaction of an iron nail with copper sulphate solution is ........... reaction.
(a) Combination
(b) Displacement
(c) Double displacement
(d) Decomposition
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Name the metal which has been placed at the top of the reactivity series.
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Copper or silver
Which of the following elements would yield an acidic oxide?
Na, S, C, K, H
What type of oxides are formed when metals combine with oxygen? Explain with the help of an example.
Arrange the following metals in order of their chemical reactivity, placing the most reactive metal first:
Magnesium, Copper, Iron, Sodium, Zinc, Lead, Calcium
Give one example, with equation, of the displacement of hydrogen by a metal from an acid.
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Write the equation for the reaction of Iron with dilute hydrochloric acid.
Name the products formed. Also indicate the physical states of all the substances involved.
The elements whose oxides can turn litmus solution blue are:
(a) carbon and sulphur
(b) sodium and carbon
(c) potassium and magnesium
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A metal less reactive and another metal more reactive than hydrogen are:
(a) aluminium and lead
(b) iron and magnesium
(c) copper and tin
(d) copper and mercury
Which of the following pair of reactants can undergo a displacement reaction under appropriate conditions?
(a) MgSO4 + Fe
(b) ZnSO4 + Fe
(c) MgSO4 + Pb
(d) CuSO4 + Fe
An element E forms an oxide E2O. An aqueous solution of E2O turns red litmus paper blue.
(a) What is the nature of the oxide E2O?
(b) State whether element E is a metal or a non-metal.
(c) Give one example of an element like E.
Name a metal which does not react with cold as well as hot water but reacts with steam.
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(i) Good thermal conductivity
(ii) Good electrical conductivity
(iii) Ductility
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