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प्रश्न
The least reactive metal among the following is:
(a) sodium
(b) silver
(c) copper
(d) lead
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उत्तर
(b) silver
Because silver lies below other metals in the reactivity series.
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संबंधित प्रश्न
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.
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:
The white powder formed when magnesium ribbon burns in oxygen is of ....................
With the help of examples, describe how metal oxides differ from non-metal oxides.
How do metals react with hydrogen? Explain with an example.
How do non-metals react with hydrogen? Explain with an example.
Write the equation for the reaction of Aluminium with dilute hydrochloric acid.
Name the products formed. Also indicate the physical states of all the substances involved.
An acidic oxide is produced by the element:
(a) Na
(b) C
(c) Ca
(d) H
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 blue are:
(a) carbon and sulphur
(b) sodium and carbon
(c) potassium and magnesium
(d) magnesium and sulphur
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
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.
What is the cause of chemical bonding (or chemical combination) of atoms of elements?
What is the characteristic of the electronic configuration of noble gases?
Write the chemical equation of the above process.
Find the odd one out:
Tungsten wire is used in electric bulbs.
