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प्रश्न
In preparation of Aqua regia hydrochloric acid and _______ acid are mixed.
पर्याय
sulphuric acid
nitric acid
carbonic acid
phosphoric acid
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उत्तर
In preparation of Aqua regia hydrochloric acid and nitric acid acid are mixed.
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संबंधित प्रश्न
What do you observe when a few pieces of iron are dropped in a blue solution of copper sulphate?
What do you observe when ferrous sulphate solution is added to an aqueous solution of sodium hydroxide.
How will you obtain Magnesium oxide from magnesium.
Also give balanced equations for the reactions
What do you observe when Magnesium ribbon is burnt in oxygen.
Write the chemical equation for the event.
A reaction was brought about between ferric oxide and aluminium.
Write a chemical equation for the following event.
Zinc oxide is dissolved in dilute hydrochloric acid.
With reference to Acid explain with a suitable example of how the reactivity of the metals could be differentiated.
Give a balanced equation for the reversible catalytic reaction involving nitrogen as one of the reactants.
Select the correct answer for the statement given below:
A neutral oxide which does not react with an acid or a base to give salt and water.
Classify the following metals based on their reactivity.
Cu, Zn, Ca, Mg, Fe, Na, Li, Hg
| More reactive | Moderately reactive | Less reactive |
Explain the following reaction with the balanced equation.
Reaction of aluminium with oxygen
Explain the following reaction with the balanced equation.
Sulphur burns in air
Observe the following diagram and identify the type of reaction and write observation.
Which of the following is the correct arrangement of the given metals in ascending order of their reactivity?
Zinc, Iron, Magnesium, Sodium
Compound X and aluminium are used to join railway tracks.
- Identify the compound X
- Name the reaction
- Write down its reaction.
A metal A, which is used in thermite process, when heated with oxygen gives an oxide B, which is amphoteric in nature. Identify A and B. Write down the reactions of oxide B with HCl and NaOH.
A metal that exists as a liquid at room temperature is obtained by heating its sulphide in the presence of air. Identify the metal and its ore and give the reaction involved.
An element A reacts with water to form a compound B which is used in white washing. The compound B on heating forms an oxide C which on treatment with water gives back B. Identify A, B and C and give the reactions involved.
Three metal samples of magnesium, aluminium and iron were taken and rubbed with sandpaper. These samples were then put separately in test tubes containing dilute hydrochloric acid. Thermometers were also suspended in each test tube so that their bulbs dipped in the acid. The rate of formation of bubbles was observed. The above activity was repeated with dilute nitric acid and the observations were recorded.
Answer the following questions:
(i) When the activity was done with dilute hydrochloric acid, then in which one of the test tubes was the rate of formation of bubbles the fastest and the thermometer showed the highest temperature?
(ii) Which metal did not react with dilute hydrochloric acid? Give reason.
(iii) Why is hydrogen gas not evolved when a metal reacts with dilute nitric acid? Name the ultimate products formed in the reaction.
OR
Name the type of reaction on the basis of which the reactivity of metals is decided. You have two metals X and Y. How would you decide which is more reactive than the other?
