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प्रश्न
Name two metals which can, however, liberate hydrogen gas from very dilute nitric acid.
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उत्तर
Magnesium and manganese are two metals that liberate hydrogen gas from very dilute nitric acid.
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संबंधित प्रश्न
_________ solution is blue in colour.
(a) CuSO4
(b) FeSO4
(c) ZnSO4
(d) Al2(SO4)3
What would you observe when zinc is added to a solution of iron (II) sulphate? Write the chemical reaction that takes place.
Show the formation of Na2O by the transfer of electrons.
Food cans are coated with tin and not with zinc because ______.
The solution of Aluminium sulphate in water is .....................
(a) Green
(b) Colourless
(c) Pink
(d) Blue
Name the metal which has been placed at the bottom of the reactivity series.
Complete and balance the following equation:
Cu (NO3)2 (aq) + Zn(s) →
With the help of examples, describe how metal oxides differ from non-metal oxides.
Which of the following elements would yield an acidic oxide.
Na, S, C, K, H
Hydrogen is not a metal but still it has been assigned a place in the reactivity series of metals. Why?
Name one metal which displaces silver from silver nitrate solution and one which does not.
An element X reacts with hydrogen, when heated, to form a covalent hydride H2X. If H2X has a smell of rotten eggs, the element X is likely to be:
(a) carbon
(b) sulphur
(c) chlorine
(d) phosphorus
The metals which can produce amphoteric oxides are:
(a) sodium and aluminium
(b) zinc and potassium
(c) calcium and sodium
(d) aluminium and zinc
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
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)
Write the chemical equation of the above process.
Explain the following:
Reactivity of aluminium decrease if it is dipped in nitric acid.
An alkali metal A gives a compound B (molecular mass = 40) on reacting with water. The compound B gives a soluble compound C on treatment with aluminium oxide. Identify A, B and C and give the reaction involved.
Metals are generally hard. Which of the following metals is an exception and can be cut with a knife?
Which of the following property is not responsible for copper to be used as electrical conduction wires?
