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प्रश्न
Complete and balance the following equation:
Na2O + H2O →
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उत्तर
Na2O(s) + H2O(l) → 2NaOH (aq)
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संबंधित प्रश्न
.................... liberated when acetic acid reacts with sodium metal.
(a) Hydrogen
(b) Chlorine
(c) Oxygen
(d) Nitrogen
A solution of CuSO4 in water is .................... in colour.
(a) Pink
(b) Blue
(c) Colourless
(d) Green
Metal A has electronic configuration (2, 8, 1) and metal B has (2, 8, 8, 2). Which is more reactive? Why? Identify these metals.
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.
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.
Which of the two metals is more reactive: copper or silver?
What type of oxides are formed when non-metals react with oxygen? Explain with an example.
What type of oxides are formed when metals combine with oxygen? Explain with the help of an example.
Explain why, metals usually do not liberate hydrogen gas with dilute nitric acid.
What happens when a rod of zinc metal is dipped into a solution of copper sulphate? Give chemical equation of the reaction involved.
A copper plate was dipped in AgNO3 solution. After certain time, silver from the solution was deposited on the copper plate. State the reason why it happened. Give the chemical equation of the reaction involved.
Name one metal which displaces silver from silver nitrate solution and one which does not.
One of the following is not a neutral oxide. This is:
(a) CO
(b) H2O
(c) N2O
(d) Na2O
Out of aluminium, copper, calcium and tin, the most reactive metal is:
(a) aluminium
(b) copper
(c) tin
(d) calcium
The elements whose oxides can turn litmus solution red are:
(a) lithium and sodium
(b) copper and potassium
(c) carbon and hydrogen
(d) phosphorus and sulphur
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
CuSO4(aq) + Fe(s) → FeSO4(aq) + Cu(s)
FeSO4(aq) + Zn(s) → ZnSO4(aq) + Fe(s)
On the basis of the above reactions, indicate which is most reactive and which is least reactive metal out of zinc, copper and iron.
Choose the correct alternative and rewrite the following:
Reaction of iron nails whith copper sulphate solution is an example of _____________________
Generally metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?
