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is negative (There is less randomness among the molecules than among the atoms) 0.164 kJ, the reaction is not spontaneous. –55.27 kJ mol–1 NO(g) is unstable, but NO2(g) is formed. qsurr = + 286 kJ mol–1 ΔSsurr = 959.73 J K–1 UNIT 7 7.2 7.3 7.5 7.6 7.8 7.9 12.237. molL–1 2.67 x 104 (i) 4.4 × 10–4 (ii) 1.90 1.59 × 10–15 [N2] = 0.0482 molL–1, [O2] = 0.0933 molL–1, [N2O] = 6.6 × 10–21 molL–1 0.0355mol of NO and 0.0178mol of Br2 248 C:\ChemistryXI\Answers\Answers-(1).pmd, 18.1.6
Wet clothes are kept for drying. Which of the following does not help them in drying: a. Spreading it out c. Making the room a little warmer b. Blowing wind over it d. Cooling the room 11. At higher altitudes the boiling points of liquids a. Increases b. Decreases Prepared by Mrs Hajra Shaikh PGT Chemistry ZIET Bhubaneswar MCQ Class IX – X Science (Chemistry) 12.
How many times is silver benzoate more ©TutorBreeze.com Please do not copy the answer given here Write to us for help in understanding the solution NCERT/CBSE CHEMISTRY CLASS 11 textbook http://www.TutorBreeze.com English, Accounts, MBA Contact for Online Tutoring in Physics, Math, Chemistry, Let the solubility of silver benzoate in water be s. The reaction is: C6 H.
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completion based MCQs 5. No of Items 6 6 6 10 4 4 8 8 8 Sub-Total 18 18 24 The items will incorporate aspects of 21st Century Skills (Creative Thinking, Decision Making, Critical Thinking, Problem Solving, and Communication) that lead to success at Secondary Stage. Ø Ø (b) For Class XI : Ø 8. There will be no separate time tables or periods for teaching or practice of PSA in schools. 9. The Question Paper containing OMR Answer Sheet shall be supplied by the Board.
Dr. Z on pH Dr. Z Chemistry Class P.O. Box 44 Old Greenwich, CT 06870 Phone: 203 698 0429 Fax: 203 698 0312 E-Mail: . [email protected] Since the cosmetic chemist is first and foremost a chemist, I am pleased to present the following short review of pH. Example What is the concentration of sodium acetate and acetic acid at pH 5.75 and 6.75 (25oC) given the following: Acids Acetic T(�C) 25 pKa 4.75 Answer 1 5.75 = 4.75 + log [Acetate]/[Acid] 1 = log [Acetate]/[Acid] There is 10 acetate molecules to each1 acid molecule at pH 5.75 Answer 2 6.75 =.
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