NCERT Exemplar problems for Class 10 Science Chapter 5 Periodic Classification of Elements Short Answer Questions Question.1 “Hydrogen occupies a unique position in the Modern Periodic Table”. Justify the statement. Answer. Hydrogen resembles with both group 1 (Alkali metals) as well as group 17 (Halogens), therefore, it occupies a unique position in the Modern Periodic…
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NCERT Exemplar problems for Class 10 Science Chapter 4 Carbon and its Compounds Short Answer Questions Question.1 Draw the electron dot structure of ethyne and also draw its structural formula. Answer. Question.2 Write the names of the following compounds. Answer. (a) Pentanoic acid (b) 1-Butyne (c) Heptanal (d) 1-Pentanol Question.3 Identify and name the functional…
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NCERT Exemplar Class 10 Science Chapter-3 Metals And Non-Metals Short Answer Type Questions 1.Iqbal treated a lustrous, divalent element M with sodium hydroxide. He observed the formation of bubbles in reaction mixture. He made the same observations when this element was treated with hydrochloric acid. Suggest how can he identify the produced gas. Write chemical…
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NCERT Exemplar problems for Class 10 Science Chapter 2 Acids, Bases And Salts Short Answer Type Questions 1.Match the acids given in Column (A) with their correct source given in Column (B). Ans.(a) —> (iv) (b) —> (iii) (c) —> (ii) (d) —> (i) Lactic acid is present in curd, acetic acid is present in…
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NCERT Exemplar problemes for Class 10 Science Chapter 1 Chemical Reactions And Equation Short Answer Type Questions 1.Write the balanced chemical equations for the following reactions and identify the type of reaction in each case. (a) Thermit reaction, iron (III) oxide reacts with aluminium and gives molten iron and aluminium oxide. (b) Magnesium ribbon…
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NCERT Exemplar Class 9 Maths – List of Chapters Number Systems Polynomials Coordinate Geometry Linear Equations in Two Variables Introduction to Euclid’s Geometry Lines And Angles Triangles Quadrilaterals Areas of Parallelograms and Triangles Circles Constructions Heron’s Formula Surface Areas and Volumes Statistics and Probability
NCERT Exemplar Problems Class 9 Maths – Statistics and Probability Question 1: The class mark of the class 90-120 is (a) 90 (b) 105 (c) 115 (d) 120 Solution: (b) In a given class 90-120, upper class = 120 and lower class = 90 Question 2: The range of the data 25, 18, 20, 22,…
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NCERT Exemplar Problems Class 9 Maths – Volume and Surface Area Question 1: If the radius of a sphere is 2r, then its volume will be Solution: (d) Given, radius of a sphere = 2r Volume of a sphere =4/3 π(Radius)3 = 4/3 π(2r)3 = 4/3 π 8r3 = (32 πr3)/3 cu units Hence the…
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NCERT Exemplar Problems Class 9 Maths – Heron’s Formula Question 1: An isosceles right triangle has area 8 cm2. The length of its hypotenuse is (a) √32 cm (b) √16 cm (c) √48 cm (d) √24 Solution: (a) Given, area of an isosceles right triangle = 8 cm2 Area of an isosceles triangle = ½…
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NCERT Exemplar Problems Class 9 Maths – Constructions Question 1: With the help of a ruler and a compass it is not possible to construct an angle of (a) 37.5° (b) 40° (c) 22.5° (d) 67.5° Solution: (b) With the help of a ruler and a compass, we can construct the angels, 90°, 60°, 45°,…
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