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प्रश्न
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
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उत्तर
(c) copper and tin
Copper lies below hydrogen and tin lies above hydrogen in the reactivity series of metals.
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संबंधित प्रश्न
Which gas is produced when dilute hydrochloric acid is added to a reactive metal?
From amongst the metals sodium, calcium aluminium, copper and magnesium, name the metal:
(i) which reacts with water only on boiling, and
(ii) another which does not react even with steam.
Name the metal which has been placed just below copper in the reactivity series.
Complete and balance the following equation:
Na2O + H2O →
Which of the following elements would yield a neutral oxide?
Na, S, C, K, H
Explain why, metals usually do not liberate hydrogen gas with dilute nitric acid.
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Describe the reaction of potassium with water. Write the equation of the reaction involved.
Give one example, with equation, of the displacement of hydrogen by a metal from an acid.
What special name is given to substances like aluminium oxide.
Name one metal which displaces silver from silver nitrate solution and one which does not.
Which of the following reactions will not occur? Why not?
(a) MgSO4 (aq) + Cu (s) → CuSO4 (aq) + Mg (s)
(b) CuSO4 (aq) + Fe (s) → FeSO4 (aq) + Cu (s)
(c) MgSO4 (aq) + Fe (s) → FeSO4 (aq) + Mg (s)
Rewrite the following statement by selecting the correct option.
A solution of Al2(SO4)3 in water is _____________.
Answer the following question:
An element X on reacting with oxygen forms an oxide X2O. This oxide dissolves in water and turns red litmus blue. State whether element X is metal or a non - metal. Explain with a proper example.
Explain the following:
Reactivity of aluminium decrease if it is dipped in nitric acid.
Which one among the following is an acidic oxide?
Generally metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?
Why is acidified water considered to be a good conductor of electricity?
