Chapter
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NCERT Textbook Exercise Solution
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NUMBER SYSTEM
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Exercise 1.1 (Page 5)
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Exercise 1.2 (Page 8)
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Exercise 1.3 (Page 14)
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Read
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Exercise 1.4 (Page 18)
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Read
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Exercise 1.5 (Page 24)
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Read
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Exercise 1.6 (Page 26)
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Read
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POLYNOMIALS
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Exercise 2.1 (Page 32)
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Exercise 2.2 (Page 34, 35)
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Read
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Exercise 2.3 (Page 40)
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Read
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Exercise 2.4 (Page 43, 44)
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Read
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Exercise 2.5 (Page 48, 49, 50)
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Read
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COORDINATE GEOMETRY
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Exercise 3.1 (Page 53)
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Read
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Exercise 3.2 (Page 60, 61)
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Read
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Exercise 3.3 (Page 65)
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Read
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LINEAR EQUATIONS IN TWO VARIABLES
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Exercise 4.1 (Page 68)
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Read
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Exercise 4.2 (Page 70)
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Read
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Exercise 4.3 (Page 74, 75)
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Read
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Exercise 4.4 (Page 77)
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Read
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INTRODUCTION TO EUCLID’S GEOMETRY
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Exercise 5.1 (Page 85, 86)
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Read
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Exercise 5.2 (Page 88)
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Read
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LINES AND ANGLES
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Exercise 6.1 (Page 96, 97)
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Exercise 6.2 (Page 103, 104)
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Exercise 6.3 (Page 107, 108)
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TRIANGLES
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Exercise 7.1 (Page 118, 119, 120)
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Read
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Exercise 7.2 (Page 123, 124)
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Read
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Exercise 7.3 (Page 128)
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Read
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Exercise 7.4 (Page 132)
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Read
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QUADRILATERALS
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Exercise 8.1 (Page 146, 147)
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Exercise 8.2 (Page 150, 151)
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Read
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AREAS OF PARALLELOGRAMS AND TRIANGLES
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Exercise 9.1 (Page 155)
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Read
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Exercise 9.2 (Page 159, 160)
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Read
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Exercise 9.3 (Page 162, 163, 164)
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Read
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Exercise 9.4 (Page 164, 165, 166)
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Read
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CIRCLES
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Exercise 10.1 (Page 171)
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Exercise 10.2 (Page 173)
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Exercise 10.3 (Page 176)
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Exercise 10.4 (Page 179)
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Read
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Exercise 10.5 (Page 184, 185, 186)
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Read
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Exercise 10.6 (Page 186, 187)
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Read
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CONSTRUCTIONS
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Exercise 11.1 (Page 191)
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Read
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Exercise 11.2 (Page 195)
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Read
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HERON’S FORMULA
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Exercise 12.1 (Page 202, 203)
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Read
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Exercise 12.2 (Page 206, 207)
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Read
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SURFACE AREAS AND VOLUMES
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Exercise 13.1 (Page 213)
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Read
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Exercise 13.2 (Page 216, 217)
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Read
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Exercise 13.3 (Page 221)
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Read
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Exercise 13.4 (Page 225)
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Read
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Exercise 13.5 (Page 228)
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Read
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Exercise 13.6 (Page 230, 231)
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Read
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Exercise 13.7 (Page 233)
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Read
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Exercise 13.8 (Page 236)
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Exercise 13.9 (Page 236, 237)
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Read
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STATISTICS
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Exercise 14.1 (Page 239)
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Read
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Exercise 14.2 (Page 245, 246)
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Read
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Exercise 14.3 (Page 258, 259, 260, 261)
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Read
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Exercise 14.4 (Page 269)
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PROBABILITY
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Exercise 15.1 (Page 283, 284, 285)
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Read
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1. What is an acid? Solution: An acid is a hydrogen-containing chemical compound which, when dissolved in water, gives hydrogen ion (H + ) or hydrated hydrogen ion (H 2 O. H + ) or hydronium ion (H 3 O + ). 2. What are bases and alkalies? Solution: Oxides and hydroxides of metals and metal like radicals (e.g., NH4 + ions) are called bases. Bases ionise to give OH - ions in aqueous solution. Bases may be soluble or insoluble in water. The soluble bases are called alkalies. Thus all alkalies are bases but all bases are not alkalies. Examples NaOH and Cu (OH) 2 both are bases, but, since NaOH is soluble in water, it is an alkali. On the other hand, since Cu (OH) 2 is insoluble in water, it is not an alkali. Other examples of alkalies are KOH, Ca (OH) 2 and NH 4 OH. 3. Define pH. Solution: pH of a given solution is the negative logarithm to the base 10 of the hydrogen ion concentration, [H +...