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प्रश्न
Write the electron-dot structures for sodium, oxygen and magnesium.
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उत्तर
| Sodium | (2, 8, 1) | \[\ce{\overset{\bullet}{Na}}\] |
| Oxygen | (2, 6) |
\[\begin{array}{cc} |
| Magnesium | (2, 8, 2) |
\[\begin{array}{cc} |
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संबंधित प्रश्न
_________ solution is blue in colour.
(a) CuSO4
(b) FeSO4
(c) ZnSO4
(d) Al2(SO4)3
Iron is
(a) More reactive than zinc
(b) More reactive than aluminium
(c) Less reactive than copper
(d) Less reactive than aluminium
The solution of Aluminium sulphate in water is .....................
(a) Green
(b) Colourless
(c) Pink
(d) Blue
The reaction of an iron nail with copper sulphate solution is ........... reaction.
(a) Combination
(b) Displacement
(c) Double displacement
(d) Decomposition
A copper coin is kept immersed in a solution of silver nitrate for some time. What will happen to the coin and the colour of the solution?
Which of the two metals is more reactive: copper or silver?
Complete and balance the following equation:
Na2O + H2O →
Which of the following elements would yield a basic oxide.
Na, S, C, K, H
What happens when magnesium reacts with very dilute nitric acid? Write an equation for the reaction involved.
What is the action of water on magnesium ? Write equation of the chemical reaction involved.
What is the action of water on aluminium ? Write equation of the chemical reaction involved.
What happens when calcium reacts with water? Write the chemical equation of the reaction of calcium with water.
What is meant by the reactivity series of metals? Arrange the following metals in an increasing order of their reactivities towards water:
Zinc, Iron, Magnesium, Sodium
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(a) Na and K
(b) K and C
(c) Na and S
(d) K and P
Out of aluminium, copper, calcium and tin, the most reactive metal is:
(a) aluminium
(b) copper
(c) tin
(d) calcium
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
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(a) carbon and sulphur
(b) sodium and carbon
(c) potassium and magnesium
(d) magnesium and sulphur
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.
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.
