Class 11

Exercise 16.2 1. A die is rolled. Let E be the event “die shows 4” and F be the event “die shows even number”. Are E and F mutually exclusive? Ans. When a die is rolled, then S = {1, 2, 3, 4, 5, 6} E: die shows 4 = {4} and F: die shows … Read more

ORGANIC CHEMISTRY – SOME BASIC PRINCIPLES AND TECHNIQUES  1. What are hybridisation states of each carbon atom in the following compounds? 2. Indicate the bonds in the following molecules: 3. Write bond line formulas for: Isopropyl alcohol, 2,3-Dimethyl butanal, Heptan-4-one. 4. Give the IUPAC names of the following compounds: (a) (b) (c) (d) (e) (f) … Read more

Miscellaneous Exercise 1. Three vertices of a parallelogram ABCD are A B and C Find the coordinates of the fourth vertex. Ans. Let D be the fourth vertex of parallelogram ABCD. Since, the diagonals of a parallelogram bisect each other. Therefore, the mid-point of AAAC and BD coincide. Coordinates of mid-point of AC = = … Read more

Exercise 16.3 1. Which of the following cannot be valid assignment of probabilities for outcomes of sample space S = Assignment (a) 0.1 0.01 0.05 0.03 0.01 0.2 0.6 (b) (c) 0.1 0.2 0.3 0.4 0.5 0.6 0.7 (d) –0.1 0.2 0.3 0.4 –0.2 0.1 0.3 (e) Ans. (a) Here probability of each outcome is … Read more

HYDROCARBONS1.How do you account for the formation of ethane during chlorination of methane? 2. Write IUPAC names of the following compounds: a. b. c. d. e. f. g. 3.For the following compounds, write structural formulas and IUPAC names for all possible isomers having the number of double or triple bond as indicated: (a) (one double … Read more

Miscellaneous Exercise 1. Find the derivative of following functions from first principle: (i) (ii) (iii) (iv) Ans. (i)Given: then = = = (ii)Given: then = = = (iii)Given: then = = = (iv)Given: then = = = Find the derivative of the following functions (it is to be understood that and are fixed non-zero constants … Read more

Miscellaneous Exercise 1. A box contains 10 red marbles, 20 blue marbles and 30 green marbles. 5 marbles are drawn from the box, what is the probability that: (i) all will be blue? (ii) at least one will be green? Ans. Total marks = 10 + 20 + 30 = 60 We have to draw … Read more

Exercise 13.1 Evaluate the following limits in Exercises 1 to 22. 1. Ans. 3 + 3 = 6 2. Ans. 3. Ans. 4. Ans. 5. Ans. 6. Ans. Putting as 7. Ans. = = 8. Ans. = = = 9. Ans. 10. Ans. = = = = = 1 + 1 = 2 11. Ans. … Read more

States of matter1. What will be the minimum pressure required to compress of air at 1 bar to 200 at 30°C? 2. A vessel of 120 mL capacity contains a certain amount of gas at 35 °C and 1.2 bar pressure. The gas is transferred to another vessel of volume 180 mL at 35 °C. … Read more

Exercise 13.2 1. Find the derivative of at Ans. Here Therefore, Derivative of at is 2. Find the derivative of at Ans. Here Therefore, Derivative of at is 99 3. Find the derivative of at Ans. Here Therefore, Derivative of at is 1 4. Find the derivatives of the following functions from first principle: (i) … Read more

Exercise 14.1 1. Which of the following sentences are statements? Give reason for your answer. (i) There are 35 days in a month. (ii) Mathematics is difficult. (iii) The sum of 5 and 7 is greater than 10. (iv) The square of a number is an even number. (v) The sides of a quadrilateral have … Read more

Redox Reactions  1. Assign oxidation numbers to the underlined elements in each of the following species: (a) (b) (c) (d) (e) (f) (g) (h) 2. What are the oxidation numbers of the underlined elements in each of the following and how do you rationalise your results? (a) 3. Justify that the following reactions are redox … Read more

Exercise 14.2 1. Write the negation of the following statements: (i) Chennai is the capital of Tamilnadu. (ii) is not a complex number. (iii) All triangles are not equilateral triangle. (iv) The number 2 is greater than 7. (v) Every natural number is an integer. Ans. (i) Negation of statement is: Chennai is not the … Read more