In which option can dilution be said to have occurred?
i) Evaporating NaCl solution to make it very concentrated
ii) Adding water to a $10 % C u S O_{4}$ solution to make it a $1 %$ solution
iii) Adding concentrated sulphuric acid to water

i) and ii)

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ii) and iii)

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i) and iii)

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iii)

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Solution

The correct option is B ii) and iii)
Dilution is adding of the solvent to a solution to lower the concentration of the solute in the solution.

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Similar questions

What would you observe in the following cases?
(i) Sulphur trioxide is dissolved in water on a large scale.
(ii) Concentrated sulphuric acid is added to equal volumes of cold water.
(iii) 100 ml of 98% sulphuric acid is kept open.
(iv) Hot concentrated sulphuric acid is added to sodium chloride crystals.
(v) Dilute sulphuric acid is added to ferrous sulphate solution.

Give reasons for the following:
(i) In the contact process, sulphur trioxide formed is dissolved in 98% sulphuric acid and not in water.
(ii) When solution of sulphur dioxide is exposed to air, it gets converted to sulphuric acid.
(iii) When diluting concentrated sulphuric acid, the acid should be added to water and not water to the acid.
(iv) When concentrated sulphuric acid is exposed to air, its volume increases and it becomes slightly dilute.
(v) Sulphuric acid can form two kinds of salts with sodium chloride.
(vi) When barium chloride is added to dilute sulphuric acid, a white precipitate is formed.
(vii) When carbon is heated with concentrated sulphuric acid, carbon dioxide is formed.
(viii) Ammonia gas cannot be dried by passing through concentrated sulphuric acid.
(ix) When concentrated sulphuric acid is added to sugar/glucose, a black mass is left behind.
(x) Concentrated sulphuric acid should not be added to oxalic acid or formic acid in the open laboratory.
(xi) When concentrated sulphuric acid is added to blue crystalline copper sulphate, it turns powdery white.
(xii) Concentrated sulphuric acid must be stored in airtight bottles.
(xiii) Cotton clothes get burnt with concentrated sulphuric acid.
(xiv) H₂SO₄ cannot be prepared by heating sodium sulphate with conc. HCl or HNO₃.

A white precipitate can be obtained by adding dilute sulphuric acid to :

(a) $C u S O_{4}$ Solution (b) NaCI Solution (c) $B a C l_{2}$ Solution (d) $N a_{2} S O_{4}$ Solution

Q. In which option can dilution be said to have occurred?
i) Evaporating NaCl solution to make it very concentrated
ii) Adding water to a

10 % C u S O_{4}

solution to make it a

1 %

solution
iii) Adding concentrated sulphuric acid to water

Q. A white precipitate can be obtained by adding dilute sulphuric acid to:
(a) CuSO₄ solution
(b) Nacl solution
(c) BaCl₂ solution
(d) Na₂SO₄ solution

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Standard X Chemistry

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In which option can dilution be said to have occurred? i) Evaporating NaCl solution to make it very concentrated ii) Adding water to a 10% CuSO4 solution to make it a 1% solution iii) Adding concentrated sulphuric acid to water

The correct option is B ii) and iii)Dilution is adding of the solvent to a solution to lower the concentration of the solute in the solution.

In which option can dilution be said to have occurred?
i) Evaporating NaCl solution to make it very concentrated
ii) Adding water to a $10 % C u S O_{4}$ solution to make it a $1 %$ solution
iii) Adding concentrated sulphuric acid to water

The correct option is B ii) and iii)
Dilution is adding of the solvent to a solution to lower the concentration of the solute in the solution.