CHAPTER-3 PAIR OF LINEAR EQUATIONS IN TWO VARIABLES EXERCISE 3.2 QUESTION -2 Solve 2x + 3y = 11 and 2x – 4y = – 24 and hence find the value of ‘m’ forwhich y = mx + 3. SOLUTION: 2x + 3y = 11…………………………..(I)2x – 4y = -24………………………… (II)From equation […]
CLASS-10 MATH’S EXERCISE 3.1 Q-2
CHAPTER-3 PAIR OF LINEAR EQUATIONS IN TWO VARIABLES EXERCISE 3.1 QUESTION -2 On comparing the ratios a1/a2 , b1/b2 , c1/c2 find out whether the linesrepresenting the following pairs of linear equations intersect at a point, areparallel or coincident: SOLUTION: (i) Given expressions; Comparing these equations with a1x+b1y+c1 = 0And […]
CLASS-11 MICRO-ECONOMICS Q-1
CHAPTER-3 PRODUCTION AND COSTS QUESTION:1 Explain the concept of a production function. Answer: The production function of a firm depicts the relationship between the inputs used in the production process and the final output. It specifies how many units of different inputs are needed in order to produce the maximum […]
CHAPTER-7 QUESTION-17
CLASS-12 CHAPTER-7 ALTERNATING CURRENT Very Short Answers 7.17 Can the instantaneous power output of an ac source ever be negative? Can the average power output be negative? Answer: a) Instantaneous power output of the AC source can be negative when P < 0 b) The average power output cannot be […]
CLASS-12 CHEMISTRY EXERCISES Q 5.1
CHAPTER-5 COORDINATION COMPOUNDS QUESTION: 5.1 Explain the bonding in coordination compounds in terms of Werner’s postulates. ANSWER:
CLASS-12 BIOLOGY QUESTION-4
CHAPTER-5 MOLECULAR BASIS OF INHERITANCE Q. 4 If the sequence of the coding strand in a transcription unit is writtenas follows: 5′-ATGCATGCATGCATGCATGCATGCATGC-3′ Writedown the sequence of mRNA. Answer: The sequence of mRNA will be 5′-AUGCAUGCAUGCAUGCAUGCAUGCAUGC-3′.Explanation: In a RNA strand thymine is replaced with uracil.The coding strand of mRNA is the […]
CLASS-12 BIOLOGY QUESTION-3
CHAPTER-4 PRINCIPLES OF INHERITANCE AND VARIATION Q. 3 A diploid organism is heterozygous for 4 loci; how many types ofgametes can be produced? Answer: If a diploid organism is heterozygous for 4 loci the different types ofgametes that can be produced can be calculated by the formula 2n,where “n” is […]
CLASS-12 BIOLOGY QUESTION-11
CHAPTER-2 HUMAN REPRODUCTION Q. 11 What are the major functions of male accessory ducts and glands? Answer:
CLASS-12 BIOLOGY QUESTION-12
CHAPTER-1 SEXUAL REPRODUCATION IN FLOWERING PLANTS. Q. 12 Why do you think the zygote is dormant for some time in a fertilized ovule? Answer: • The fusion of male gamete and nucleus of the egg cell leads to formation of zygote. • The zygote remains dormant for some time until […]
CLASS-12 BIOLOGY QUESTION-6
CHAPTER-1 SEXUAL REPRODUCATION IN FLOWERING PLANTS. Q. 6 With a neat diagram explain the 7-celled, 8-nucleate nature of the female gametophyte. Answer: i) The megaspore mother cell in flowering plants undergoes reduction division to form 4 haploid megaspores. ii) Out of these 4 megaspores, 3 degenerate and the remaining one […]