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प्रश्न
In nature, metal A is found in a free state while metal B is found in the form of its compounds. Which of these two will be nearer to the top of the activity series of metals?
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उत्तर
The metal B will be nearer to the top of the activity series of metals because this metal is so reactive that it reacts with most elements to form its compounds. But metal A is less reactive as it exists in free state without reacting with other elements.
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संबंधित प्रश्न
State whether the following statement is true or false:
Non-metals react with dilute acids to produce a gas which burns with a 'pop' sound.
Name two metals which form amphoteric oxides.
Complete and balance the following equation:
Na2O + H2O →
Complete and balance the following equation:
Cu (NO3)2 (aq) + Zn(s) →
Fill in the following blank with suitable word:
Magnesium liberates ............... gas on reacting with hot boiling water.
What is the nature of the oxide Na2O? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.
What type of oxides are formed when non-metals react with oxygen? Explain with an example.
Explain why, metals usually do not liberate hydrogen gas with dilute nitric acid.
Arrange the following metals in order of their chemical reactivity, placing the most reactive metal first:
Magnesium, Copper, Iron, Sodium, Zinc, Lead, Calcium.
What is the action of water on magnesium ? Write equation of the chemical reaction involved.
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
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
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
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.
A zinc plate was kept in a glass container having CuSO4 solution. On examining it was found that the blue colour of the solution is getting lighter and lighter. After a few days, when the zinc plate was taken out of the solution, a number of small holes were noticed in it. State the reason and give chemical equation of the reaction involved.
What are noble gases
Write a chemical equation to illustrate the use of aluminium for joining cracked railway lines.
Explain the following:
Reactivity of aluminium decrease if it is dipped in nitric acid.
Find the odd one out:
Tungsten wire is used in electric bulbs.
