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Chemistry questions solution chapter class 12th

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Chemistry questions solution chapter 1 class 12th

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THE ZONE OF CHEMISTRY( SOLUTION) DPP (mass percentage)

1.A solution is prepared by dissolving 6. A solution contains 30% w/w NaCl by
10 g of sodium chloride (NaCl) in 90 g of mass. If the total mass of the solution is
water. Calculate the mass percentage of 200 g, calculate the mass of NaCl and
NaCl in the solution. the mass of the solvent.
90 ग्राम जल में 10 ग्राम सोडियम क्लोराइि एक विलयन में 30% w/w NaCl है। यदि
(NaCl) घोलकर एक विलयन तैयार ककया विलयन का कुल द्रव्यमान 200 ग्राम है , तो
गया। विलयन में NaCl का द्रव्यमान प्रततशत NaCl का द्रव्यमान और विलयन के विलायक
ज्ञात कीजजए। का द्रव्यमान ज्ञात कीजजए।
2. A solution is made by dissolving 15 g 7.A solution is made by dissolving 80 g
of urea (NH₂CONH₂) in 85 g of water. of KNO₃ in 320 g of water. If the final
Calculate the mass percentage of urea volume of the solution is 375 mL,
in the solution. calculate the mass percentage of KNO₃
85 ग्राम जल में 15 ग्राम यूररया (NH₂CONH₂) in the solution.
घोलकर एक विलयन तैयार ककया गया। 80 ग्राम KNO₃ को 320 ग्राम जल में घोलकर

विलयन में यूररया का द्रव्यमान प्रततशत ज्ञात एक विलयन तैयार ककया गया। यदि विलयन

कीजजए। का अंततम आयतन 375 शमलीलीटर है, तो
3. A solution is made by dissolving 20 g KNO₃ का द्रव्यमान प्रततशत ज्ञात कीजजए।
of potassium chloride (KCl) in 180 g of 8. In a laboratory, 15 g of copper sulfate
water. Calculate the mass percentage of (CuSO₄) is dissolved in 85 g of water.
KCl in the solution. Calculate the mass percentage of
90 ग्राम जल में 20 ग्राम पोटे शशयम क्लोराइि copper sulfate and the molarity of the
(KCl) घोलकर एक विलयन तैयार ककया गया। solution. प्रयोगशाला में 15 ग्राम तांबा सल्फेट

विलयन में KCl का द्रव्यमान प्रततशत ज्ञात (CuSO₄) को 85 ग्राम जल में घोलकर एक

कीजजए। विलयन तैयार ककया गया। CuSO₄ का
4. A solution is prepared by dissolving द्रव्यमान प्रततशत और विलयन की मोलैररटी
50 g of sugar in 250 g of water. What is ज्ञात कीजजए।
the mass percentage of sugar in the
solution?
250 ग्राम जल में 50 ग्राम चीनी घोलकर एक BY:-
विलयन तैयार ककया गया। विलयन में चीनी का S.K. SHRIVASTAV
द्रव्यमान प्रततशत ज्ञात कीजजए। M.Sc(CHEM)
5. A solution contains 30% w/w NaCl by 8538909073
mass. If the total mass of the solution is
200 g, calculate the mass of NaCl and
the mass of the solvent.
50 ग्राम NaOH को 150 ग्राम जल में घोलकर
एक विलयन तैयार ककया गया। यदि विलयन
का घनत्ि 1.2 ग्राम/शमलीलीटर है, तो NaOH
का द्रव्यमान प्रततशत और विलयन की आयतन
ज्ञात कीजजए।

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