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Rational Numbers test paper for class 08 Mathematics. These test papers include all main concepts of the chapter in CBSE class 08 Mathematics. It is very useful for testing and commanding over the topic and to excel in various Olympiads and other competitions  Introduction  Properties of Rational Numbers  Representation of Rational Numbers on the Number line.  Rational Numbers between two rational numbers. Learning Objectives:  The students learn to represent rational numbers on the number line. They learn to verify various properties taking different values. 8th maths Rational Number CBSE Test Paper - 01 8th maths Rational Number CBSE Test Paper - 02 8th maths Rational Number CBSE Test Paper - 03 8th maths Rational Number CBSE Test Paper - 04 8th maths Rational Number CBSE Test Paper - 05 Download Files 8th maths Rational Number CBSE Worksheet - 01 8th maths Rational Number CBSE Worksheet - 02 8th maths Rational Number CBSE Worksheet - 03 8th maths Rational ...

CHEMISTRY  Paper & Solution  Code : 55/3  Time : 3 Hrs. Max. Marks : 70  General Instructions :  (i) All questions are compulsory. (ii) Questions number 1 to 8 are very short answer questions and carry 1 mark each. (iii) Questions 9 to 18 are short answer questions and carry 2 marks each. (iv) Question number 19 to 27 are also short-answer questions and carry 3 marks each. ) Question number 28 to 30 are long-answer questions and carry 5 marks each. (vi) Use Log Tables, if necessary. Use of calculators is not allowed Solve Chemistry Question Paper 2014 CBSE Board Class XII               Download File Physics Paper & Solution Code : 55/3  Time : 3 Hrs. Max. Marks : 70  General Instruction :   (i) All questions are compulsory.   (ii) There are 30 questions in total. Questions 1 to 8 are very short answer type questions and carry one mark  each.  ...

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1. Atomic no. of x = 12; Atomic No. of y = 16 2. The transfer of traits from parents to offspring is called heredity. 3. Paper and glass can be easily recycled but thrown in the dust bin. 4. This is because both the father and the mother contribute practically equal amounts of genetic material to the child during sexual reproduction in forming ztgote. 5. Object placed between pole and focus see in diagram: 6. Decomposer break-down the complex organic substances into simple inorganic substances. The natural replenishment of the soil also takes place by Decompose. 7. Watershed management is the study of the characteristics of a watershed. It helps to manage water quality, water supply, and drainage and rainwater flow. It also ensures sustainable maintenance planning of a watershed. Benefits of a watershed management system: Water quality is strictly maintained. Distribution of water is equal and sustainable. 8. The producers convert solar energy into chemical energy...

Time: 3-3and1/2 hr _ Max mark: 100 [includes 10 marks based on Open Text Theme] Test held in School: Sadhana Devi Vidyapith, Samastipur - Punjabi Colony [By JSunil] 1 mark 1. As per the law of definite proportional carbon and oxygen combine in ratio 3: 8. Compute the mass of oxygen gas that would be required to react completely with 6 gm carbon. 2. A pore bearing organism like creature “A” belong to a phylum “B” of kingdom Animalia. 3. In which reason is soil erosion very difficult to revert. 2 marks 4. Explain, What is Organ specific manifestation? 5. A man drops a stone of mass 2 kg room the top of a building of height 15m when it reaches the ground, find its kinetic energy. 6. When an object is immersed in the fluid name the two forces acting on it. 3 marks 7. (a) The mass number of an element is 18. It contains 7 electrons. What is the number of proton? and neutron in it. (b) State the problem of atomic structure which was solved after the discovery ...

Q. Find the gram molecular mass of water (H2O) Calculation: 2(H) = 2 x 1 = 2 . 1(O) = 1 x 16 = 16 ∴ Gram molecular mass of H2O= 18g Mole is defined as the amount of substance that contains as many specified elementary particles as the number of atoms in 12g of carbon-12 isotope. One mole is also defined as the amount of substance which contains Avogadro number (6.023 x 10^23) of particles. For eg. one mole of oxygen atoms represents 6.023 x 10^23 atoms of oxygen and 5 moles of oxygen atoms contain 5 x 6 . 0 2 3 x 10 ^23 a t oms of oxygen . Q. Calculate the number of aluminium ions present in 0.051 g of aluminium oxide. [Hint : The mass of an ion is same as that of an atom of the same element. Sol: 1 mole of Al2O3 contains aluminium ions = 2 × 6.022 × 10^23 = 12.044 × 10^23 Now, 102 g of Al2O3 has number of aluminium ions = 12.044 × 10^23 0.051 g of Al2O3 has number of aluminium ions = (12.044 ×1023 × 0.051)/102= 6.022 × 10^20 ions Q. How many atoms of oxygen are present i...

Q1 The first three terms of an AP respectively are  3y – 1, 3y + 5 and 5y + 1. Then y equals: (A) –3 (B) 4 (C) 5 (D) 2 Solution: (C) 5 Q2 In Fig. 1, QR is a common tangent to the given circles, touching externally at the point T. The tangent at T meets QR at P. If PT = 3.8 cm, then the length of QR (in cm) is : (A) 3.8 (B) 7.6 (C) 5.7 (D) 1.9 Solution: (B) 7.6 Q3 In Fig. 2, PQ and PR are two tangents to a circle with centre O. If ∠QPR = 46°, then ∠QOR equals: (A) 67° (B) 134° (C) 44° (D) 46° Solution: (B) 134° Q4. A ladder makes an angle of 60° with the ground when placed against a wall. If the foot of the ladder is 2 m away from the wall, then the length of the ladder (in metres) is: (A) 43 (B) 43 (C) 22 (D) 4 Solution: (D) 4 Q5 If two different dice are rolled together, the probability of getting an even number on both dice, is: (A) 136 (B) 12 (C) 16 (D) 14 Solution: (D) 14 Q6 A number is s...

SECTION A All questions are similar in 30/2 set                             SECTION B All questions are similar in 30/2 set except Q.No. 14 14. Find the value of p so that p x (x-3)+9 = 0 has equal roots. SECTION C All questions are similar in 30/2 set except Q. No. 20,22,23,24 20. Construct a triangle with side 5 cm, 5.5 cm and 6.5 cm . Now construct another triangle, whose sides are 3/5 times the corresponding sides of given triangle. 22. The sum of first seven term of AP is 182. If 4th and 17th term are in ratio 1: 5 . Find AP 23.From the top of 60m high building , the angle of depression of the top and bottom of a tower are 45 deg. and 60 deg. respectively. Find the height of tower. 24.Find a point p on y axis which is equidistant from points A(4,8)and B(-6,6) SECTION D All questions are similar in 30/2 set except Q.No.31, 32 and 34 31. (x – 4) / (x – 5 )/ (x – 6) / (x – 7 ) = 10/3 32. Fi...

Series HRS Code-30/2 Summative Assessment –II Subject Mathematics class 10 CBSE Board 2014 SECTION-A 1. The probability that a number selected at random from the number 1,2,3,…..15. is a multiple of 4 is (A)4/15 (B) 2/15 (C)1/5 (D)1/3 Ans: 1/5 2. The angle of depression of car parked on the road from the top of a 150m high tower is 300 . The distance of the car from the tower in m meter is (A)50Ö3 (B)150Ö3 (C) 50Ö2 (D)75 Ans: (B)150Ö3 3. Two circle touches externally at P . AB is common tangent to the circle touching them at A and B . The value of <APB is (A)300 (B)450 (C)600 (D) 900 Ans: (B)450 4. If k,2k -1 and 2k + 1 are three consecutive term of AP then value of k is (A)2 (B)3 (C)-3 (D)5 Ans: (B)3 5. A chord of a circle of ...

1 marks 1. Write the symbols of the following elements. (a) Iron (b) Silver 2. State the phylum to which antedon (feather star) and asterias (Starfish) belong. 3. Mention two factors that influence the pattern of winds. 2 marks 4. Distinguish between Bryophyta and Thallophyta stating two examples of each. 5. List the causative organisms for the following diseases. (i) Kala-azar (ii) Sleeping sickness (iii) Acne (iv) AIDS 6. The volume of 50g of a substance is 20cm3. If the density of water is 1 g/cm3, will the substance float or sink in water ? Justify your answer. 7. What is the work done by the force of gravity in the following cases ? (a) Satellite moving around the earth in a circular orbit of radius 35000 km. (b) A stone of mass 250 g is thrown up through a height of 2.5 m. 3 marks 8. Define formula unit mass ? How is it calculated. ? Write the formula unit mass of (NH4)2 SO4 . (Given atomic mass : N = 14 u, H= 1 u, S = 32 u, O= 16 u). 9. (a) If ...