मराठी

Explain Why, Metals Usually Do Not Liberate Hydrogen Gas with Dilute Nitric Acid.

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प्रश्न

Explain why, metals usually do not liberate hydrogen gas with dilute nitric acid.

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उत्तर

Nitric acid is a powerful oxidising agent. So as soon as hydrogen gas is produced due to the action of nitric acid on metals, it oxidises hydrogen to form water and reduces itself to nitrogen oxides. Hence hydrogen gas is not liberated in the reaction.

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पाठ 3: Metals and Non-metals - Exercise 1 [पृष्ठ १३३]

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लखमीर सिंह Chemistry [English] Class 10
पाठ 3 Metals and Non-metals
Exercise 1 | Q 42.1 | पृष्ठ १३३

संबंधित प्रश्‍न

The reaction of an iron nail with copper sulphate solution is ........... reaction.

(a) Combination

(b) Displacement

(c) Double displacement

(d) Decomposition


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.


What changes in the colour of iron nails and copper sulphate solution do you observe after keeping the iron nails dipped in copper sulphate solution for about 30 minutes?


Which of the two metals is more reactive: copper or silver?


Explain why, the surface of some metals acquires a dull appearance when exposed to air for a long time.


Complete and balance the following equation:

Na  +  O2 →


Complete and balance the following equation:

Na2O  +  H2O →


Fill in the following blank with suitable word:

The white powder formed when magnesium ribbon burns in oxygen is of ....................


Name one metal which displaces copper from copper sulphate solution and one which does not.


You are given a solution of AgNO3. Which of the following do you think cannot displace Ag from AgNO3solution?
(a) Magnesium
(b) Zinc
(c) Gold
(d) Copper


Out of the following oxides, the amphoteric oxide is:
(a) Fe2O3
(b) Al2O3
(c) P2O5
(d) N2O


An element X forms two oxides XO and XO2. The oxide XO is neutral but XO2 is acidic in nature. The element X is most likely to be:
(a) sulphur
(b) carbon
(c) calcium
(d) hydrogen


State and explain the reaction, if any, of the following metals with a solution of copper sulphate:
(a) Gold
(b) Copper
(c) Zinc
(d) Mercury


Write the name and formula of a molecule made up of three atoms of oxygen.


Rewrite the following statement by selecting the correct option.
A solution of Al2(SO4)3 in water is _____________.


Write the chemical equation for the following reaction:
Calcium metal reacts with water.


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.


Why is acidified water considered to be a good conductor of electricity?


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