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Q.1) Which endocrine gland is present in males but not in females? Q.2) List two natural ecosystems. Q.3) What is commercial unit of electrical energy? Represent it in terms of joule. Q.4) What is the role of plane mirror and lateral inversion? Q.5) How is ethene prepared from ethanol? Give reaction involved in it. Q.6) In tobacco plant, the male gametes have twenty four chromosomes. What is the number of chromosomes in female gamete? What is the number of chromosomes in zygote? Q.7) Explain the role of mouth in digestion of food. Q.8) Mention the major events during photosynthesis. Q.9) Give two methods to slow down rancidity. Q.10) What constitutes the central and peripheral nervous system? How are the components of central nervous system protected? Q.11) Write the formula and draw electron dot structure of carbon tetrachloride. Q.12) What is saponification? Write the reaction involved in this process. Q.13) What is electrical resistivity of the material? What is its unit? Describe a...

1 MARK QUESTIONS Q.1) Name the substance oxidised and reduced in the given reaction MnO2 + 4HClv----> MnCl2 + 2H2O + Cl2 Q.2) What process in plants is known as transpiration? Q.3) Write the SI unit of resistivity? 2 MARKS QUESTIONS Q.4) Which among the following changes are exothermic and endothermic in nature? a.) Decomposition of ferrous sulphate  b.) Dilution of sulphuric acid c.) Dissolution of sodium hydroxide in water d.) Dissolution of ammonium chloride in water Q.5) Why do we store silver chloride in dark coloured bottles? Q.6) Name the correct substrates in the following enzymes a.) Trypsin b.) Amylase c.) Pepsin d.) Lipase Q.7) How does use of a fuse wire protect electrical appliances? Q.8) Three 2ohm resistors A,B and C are connected as shown below. Each of them dissipates energy and can withstand a maximum power of 18W without melting. Find the maximum current that can flow through the three resistors.  3 MARKS QUESTIONS Q.9) Differentiate between arteries and ...

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NCERT INTEXT QUESTIONS Q.1) You have been provided with three test tubes. One of them contains distilled water and the other two contains an acidic solution and a basic solution, respectively. If you are given only red litmus paper, how will you identify the contents of each test tube? Solution - (a) Put red litmus paper turn by turn in each of the three test tubes. The solution which turns the red litmus paper to blue will be a basic solution. Here, the blue litmus paper formed can now be used to test the acidic solution.  (b) Put this blue litmus paper in the remaining two test tubes, one by one. The solution which turns the blue litmus paper to red will be the acidic solution. (c) The solution which has no effect on any litmus paper will be neutral and hence, it will be distilled water. Q.2) Why should curd and sour substances not be kept in brass and copper vessels? Solution- Curd and other sour substances should not be kept in brass and copper vessels. This is because curd and...

(1-2 MARK QUESTIONS) Q.1) A box contains cards numbered 11 to 123 . A card is drawn at random from the box. Find the probability of the number on the drawn card is  (a) a square number (b) a multiple of 7  Q.2) A box contains 12 balls of which some are red in colour. If 6 more red balls are put in the box and a ball is drawn at random, the probability of drawing a red ball doubles than that what it was before. Find the number of red balls in the bag. Q.3) A die is drawn once. Find the probability of getting 1.) A prime number  2.) An odd number 3.) A number lying between 2 and 6. Q.4) In a single throw of a pair of different dice , what is the probability of getting (a) a prime number on each dice  (b) a total of 9 and 11 Q.5) Cards marked with the number 3,4,5....50 are placed in a box and mixed thoroughly. A card is drawn at random from the box. Find the probability that the selected card bears a perfect square. Q.6) Three different coins are tossed together. Find ...

2 marks questions Q.1) If a tower is 30m high ,casts a shadow 10√3 m long on the ground,then what is the angle of elevation of the sun? Q.2) If the angle of elevation of the tower from a distance of 100m from its foot is 60° ,then what will be the height of the tower? Q.3) If a pole 12m high casts a shadow of 4√3 m long on the ground,find the sun's elevation. Q.4) An observer 1.7m tall is 20√3m away from the tower. The angle of elevation from the eye of observer to the top of tower is 30° . Find the height of tower. Q.5) A ladder leaning against the wall, makes an angle 60° with the horizontal. If the foot of the ladder is 2.5m away from the wall, find the length of the ladder. Q.6) The angle of elevation of the top of a tower from a point on the ground, which is 30m away from the foot of the tower is 30° . Find the height of the tower. Q.7) The ratio of the height of a tower and the length of its shadow on the ground is √3:1. What is the angle of elevation of the sun? Q.8) A circu...

(1 marks questions ) Q.1) Find the eleventh term from the last term of the AP 27,23,19,......-65. Q.2) Which term of the AP 3,15,27,39..... will be 12 more than its 21st term. Q.3) Find the value of the middle term of the following A.P. -6,-2,2....58. Q.4) Find the 10th term from the end of the A.P. 4,9,14.....254. Q.5) Which term of the A.P. 14,11,8......is -1. Q.6) If 4/5,a,2 are three consecutive terms of the AP, find the value of a. Q.7) Show that the sequence 3,6,9,12 is an AP . Find its 15th term and the general term. Q.8) Find the sum of 1+(-2)+ (-5)+(-8)......+(-236). Q.9) Is √3,√12,√27,√48.....form an AP . Justify your answer. Q.10) What is the common difference of an AP in which a21-a7 = 84? (2 marks questions) Q.1) The first term of an AP is 5 and the last term is 45 and the sum of all its term is 400. Find the number of terms and the common difference of the AP. Q.2) Yasmin saves 32rs during the first month,36rs in the second month and 40rs in the third month. If she contin...

1 MARK QUESTIONS Q.1) Write whether the rational number 7/75 will terminating decimal expansion or a non terminating repeating decimal expansion. Q.2) Find the HCF of 96 and 404 by the prime factorisation method. Hence, find their LCM. Q.3) A rational number in which it's decimal expansion is 327.7081 . What can you say about the prime factors of q,when this number is expressed in the form of p/q. Give reasons. Q.4) An army contingent of 616 members is to march behind an army band of 32 members in a parade. The two groups are to march in the same number of columns. Find the maximum number of columns in which they can March. Q.5) Two positive integers p and q can be expressed as p= a(b)2 and q= (a)2b. a and b are prime numbers . What is the LCM of p and q? Q.6 Find the missing numbers in the following factor tree.  Q.7) Without actually performing the long division, 13/3125 will have terminating decimal expansion or non terminating decimal expansion. 2 marks questions Q.1...

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