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Access Answer Of Some Selected Problems for Class 11 Chemistry
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UNIT 1
1.17 ~ 15 × 10–4 g , 1.25 × 10–4 m
1.18 (i) 4.8 × 10–3 (ii) 2.34 × 105 (iii) 8.008 × 103 (iv) 5.000 × 102 (v) 6.0012
1.19 (i) 2 (ii) 3 (iii) 4 (iv) 3 (v) 4 (vi) 5
1.20 (i) 34.2 (ii) 10.4 (iii) 0.0460 (iv) 2810
1.21 (a) law of multiple proportion (b) (i) Ans : (106 mm, 1015 pm)
(ii) Ans : (10–6 kg, 106 ng)
(iii) Ans : (10–3 L, 10–3 dm3)
1.22 6.00 × 10–1 m =0.600 m
1.23 (i) B is limiting (ii) A is limiting
(iii) Stoichiometric mixture –No (iv) B is limiting
(v) A is limiting
1.24 (i) 2.43 × 103 g (ii) Yes (iii) Hydrogen will remain unreacted; 5.72 × 102g
1.26 Ten volumes
1.27 (i) 2.87 × 10–11m (ii) 1.515 × 10–11 m (iii) 2.5365 × 10–2kg
1.30 1.99265 × 10–23g
1.31 (i) 3 (ii) 4 (iii) 4
1.32 39.948 g mol–1
1.33 (i) 3.131 × 1025 atoms (ii) 13 atoms (iii) 7.8286 × 1024 atoms
1.34 Empirical formula CH, molar mass 26.0 g mol–1, molecular formula C2H2
1.35 0.94 g CaCO3
1.36 8.40 g HCl
UNIT 2
2.1 (i) 1.099 × 1027 electrons (ii) 5.48 × 10–7 kg, 9.65 × 104C
2.2 (i) 6.022 × 1024electrons
(ii) (a) 2.4088 × 1021 neutrons(b) 4.0347 × 10–6 kg
(iii) (a) 1.2044 × 1022 protons (b) 2.015 × 10–5 kg
2.3 7,6: 8,8: 12,12: 30,26: 50, 38
2.4 (i) Cl (ii) U (iii) Be
2.5 5.17 × 1014 s–1, 1.72 × 106m–1
2.6 (i) 1.988 × 10–18 J (ii) 3.98 × 10–15 J
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Answer Of Some Selected Problems Digital Textbook & Resources for Class 11 Chemistry
NCERT Book Class 11 Chemistry Answer Of Some Selected Problems
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