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प्रश्न
Name the metal which has been placed at the top of the reactivity series.
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उत्तर
Potassium is the metal that has been placed at the top of the reactivity series.
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संबंधित प्रश्न
Name the following:
Metals which forms an amphoteric oxide.
Write equations for the reactions of iron with steam.
Which of the two metals is more reactive: copper or silver?
Write equation for the reaction of magnesium with oxygen.
Fill in the following blank with suitable word:
Ordinary aluminium strips are not attacked by water because of the presence of a layer of ................. on the surface of aluminium.
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
Explain why, metals usually do not liberate hydrogen gas with dilute nitric acid.
Describe the reaction of potassium with water. Write the equation of the reaction involved.
What happens when a metal reacts with dilute hydrochloric acid? Explain with the help of an example.
Name one metal which displaces copper from copper sulphate solution and one which does not.
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.
Metal A burns in air, on heating, to form an oxide A2O3 whereas another metal B burns in air only on strong heating to form an oxide BO. The two oxides A2O3 and BO can react with hydrochloric acid as well as sodium hydroxide solution to form the corresponding salts and water.
(a) What is the nature of oxide A2O3?
(b) What is the nature of oxide BO?
(c) Name one metal like A.
(b) Name one metal like B.
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
What are noble gases
Write the name and formula of a molecule made up of three atoms of oxygen.
Calcium floats over water during the reaction with water. Give reason.
Write the chemical equation of the above process.
Which one among the following is an acidic oxide?
