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Class 12th chemistry questions solution chapter

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Class 12th chemistry questions

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THE ZONE OF CHEMISTRY (Volume percentage ) 12th - DPP
1.In a mixture, the volume percentage एक िवा के घोल िें समिय ित्व 60 ml है जो घोल
of alcohol is 20%. If the total volume का 15% है। घोल की कु ल िात्रा क्या होगी?
of the mixture is 500 milliliters, what 7. The ratio of alcohol to water in a
is the volume of alcohol in the mixture is 3:5. If alcohol is 24% of
mixture? the total volume, and the volume of
एक मिश्रण िें अल्कोहल की िात्रा 20% वॉल्यूि water is 760 ml, what is the total
प्रमिशि है। यमि मिश्रण का कु ल आयिन 500 volume of the mixture?
मिलीलीटर है, िो अल्कोहल की िात्रा मकिनी है? एक मिश्रण िें अल्कोहल और पानी की िात्रा का
2. In a mixture, water is 75% by अनुपाि 3:5 है। यमि मिश्रण का 24% वॉल्यूि
volume. If the total volume is 800 ml, अल्कोहल है, िो कु ल मिश्रण की िात्रा मकिनी होगी
what is the volume of water? यमि पानी की िात्रा 760 ml है?
एक मिश्रण िें पानी का वॉल्यूि प्रमिशि 75% है। 8. A 500 ml solution contains 40%
यमि मिश्रण का कु ल आयिन 800 ml है, िो पानी acid. How much water should be
की िात्रा क्या है? added so that the acid concentration
3. The solution contains 120 ml of becomes 25% by volume?
acid, which is 30% of the total . 500 ml के एक घोल िें अम्ल का वॉल्यूि
volume. What is the total volume? प्रमिशि 40% है। इसिें मकिना ml पानी मिलाया
एक घोल िें अम्ल की िात्रा 120 ml है, और यह जाए मक अम्ल का वॉल्यूि प्रमिशि 25% रह जाए?
कु ल घोल का 30% है। घोल का कु ल आयिन क्या 9. A solution contains 40% acid. If 60
होगा? ml of water is added, the percentage
4. If a mixture contains 25% alcohol of acid becomes 30%. What was the
and the volume of alcohol is 250 ml, initial volume of the solution?
what is the total volume of the एक मिश्रण िें 40% अम्ल है। यमि इसिें 60 ml
mixture? पानी मिलाया जाए िो अम्ल का प्रमिशि 30% हो
. यमि मकसी मिश्रण िें अल्कोहल 25% है और जािा है। प्रारंभिक मिश्रण की िात्रा मकिनी थी?
इसकी िात्रा 250 ml है, िो कु ल मिश्रण की िात्रा 10. A 600 ml solution contains 150 ml
क्या होगी? of acid. 100 ml is removed and
5. In a 500 ml mixture, there is 80 ml replaced with water. What will be the
acid. What is the volume percentage new percentage of acid?
of acid? 600 ml के घोल िें 150 ml अम्ल है। 100 ml
एक 500 ml के मिश्रण िें अम्ल 80 ml है। अम्ल मनकाला जािा है और उिनी ही िात्रा िें पानी
का वॉल्यूि प्रमिशि क्या है? मिलाया जािा है। नया प्रमिशि क्या होगा?
6. A medicine solution contains 60
ml active ingredient, which is 15% of
the solution. What is the total
volume?




BY:- S.K.Shrivastav MSc.(chem) 8538909073

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