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NCERT Class 11 Chemistry Answer Of Some Selected Problems Digital Edition
For Class 11 Chemistry, this chapter in NCERT Book Class 11 Chemistry Answer of Some Selected Problems provides a detailed overview of important concepts. We highly recommend using this text alongside the NCERT Solutions for Class 11 Chemistry to learn the exercise questions provided at the end of the chapter.
Answer Of Some Selected Problems NCERT Book Class Class 11 PDF (2025-26)
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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NCERT Book Class 11 Chemistry Answer Of Some Selected Problems
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