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A, B, C ও D এসিডগুলির Ka যথাক্রমে 1.5 x 10-5, 1.35 x 103, 1.20 x 10-10 ও 1.0 x 10 - 2 । pH 5 বাফার প্রস্তুত করতে কোনটির ব্যবহার সুবিধাজনক?

A, B, C ও D এসিডগুলির Ka যথাক্রমে 1.5 x 10-5, 1.35 x 103, 1.20 x 10-10 ও 1.0 x 10 - 2 । pH 5 বাফার প্রস্তুত করতে কোনটির ব্যবহার সুবিধাজনক? Correct Answer A

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Study the following table and answer the question: Number of students enrolled for Vocational Courses (VC) in five institutes - A, B, C, D & E.   Year Institute 2013 2014 2015 2016 2017 2018 A 120 135 130 135 128 140 B 125 132 138 132 135 142 C 125 120 125 138 140 135 D 100 125 122 140 128 138 E 105 110 115 147 130 145 The total number of students enrolled for VC in institute C in 2013, 2014 and 2017 is what percent of the total number of students enrolled in all the five institutes in 2018?
Study the following table and answer the question: Number of students enrolled for Vocational Courses (VC) in five institutes - A, B, C, D & E. Year →  Institue ↓ 2013 2014 2015 2016 2017 2018 A 120 135 130 135 128 140 B 125 132 138 132 135 142 C 125 120 125 138 140 135 D 100 125 122 140 128 138 E 105 110 115 147 130 145   The total number of students enrolled for VC in institutes A, B and D in 2015 is what percent more than the total number of students enrolled in institutes C and E in 2018? (correct to one decimal point)
Study the following table and answer the question: Year →  Institue ↓ 2013 2014 2015 2016 2017 2018 A 120 135 130 135 128 140 B 125 132 138 132 135 142 C 125 120 125 138 140 135 D 100 125 122 140 128 138 E 105 110 115 147 130 145 Number of students enrolled for Vocational Courses (VC) in five institutes - A, B, C, D & E. What is the sum of the average number of students enrolled for VC in institute B in 2014, 2015 and 2017 and the average number of students enrolled in institute E in 2013 and 2018?
বাফার দ্রবণের ক্ষেত্রে কোনটি সঠিক?(i) দ্রবনের pH ও এসিডের pKa এর পার্থক্য যতে বেশি হয় বাফার দ্রবণের কার্যকারিতা ততো কমে যায় (ii) অম্লীয় বাফার দ্রবণের ক্ষমতা সর্বোচ্চ হয় যখন pH = pK₂ হয় (iii) ক্ষারীয় বাফার দ্রবণের ক্ষমতা সর্বোচ্চ হয় যখন pH = pK হয়
দেহের রক্তের pH অপরিবর্তিত রাখার জন্য যে বাফার সিস্টেম কাজ করে- i. কার্বনেট বাফার ii. বাইকার্বনেট বাফার iii. ফসফেট বাফার নিচের কোনটি সঠিক?
The following table presents the number of candidates trained by a training centre over 6 years (2001 to 2006). Year Batch 1 Batch 2 Batch 3 Batch 4 Batch 5 2001 75 144 114 102 108 2002 90 126 102 84 126 2003 96 114 75 105 135 2004 105 90 150 90 75 2005 90 75 135 75 90 2006 105 60 165 45 120 The number of candidates trained in Batch 2 in 2001 was what percentage more than the number of candidates trained in Batch 5 in 2005?
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The following table gives the sales of Drinks manufactured by a company over the years. Study the table below and answer the questions that follow: Number of different types of Drinks sold by a company over the year(in thousands) Year Pepsi Miranda Fanta Coke Sprite Total 2002 75 144 114 102 108 543 2003 90 126 102 84 126 528 2004 96 114 75 105 135 525 2005 105 90 150 90 75 510 2006 90 75 135 75 90 465 2007 105 60 165 45 120 495 2008 115 85 160 100 145 605 In the case of which drink there was continuous decrease in sales from 2002 to 2007?
The following table gives the sales of Drinks manufactured by a company over the years. Study the table below and answer the questions that follow: Number of different types of Drinks sold by a company over the year(in thousands) Year Pepsi Miranda Fanta Coke Sprite Total 2002 75 144 114 102 108 543 2003 90 126 102 84 126 528 2004 96 114 75 105 135 525 2005 105 90 150 90 75 510 2006 90 75 135 75 90 465 2007 105 60 165 45 120 495 2008 115 85 160 100 145 605 The total sales of all the seven years are the maximum for which drink?