9 CBSE (SA-II) - Pioneer Mathematics

L.K. Gupta (Mathematics Classes)

www.pioneermathematics.com

Ph: 9815527721, 4617721

PIONEER GUESS PAPERS th

9 CBSE (SA-II) SCIENCE GENERAL INSTRUCTIONS 1. The question paper comprises of two sections, A and B. You have to attempt both the sections. 2. All questions are compulsory. 3. There is no overall choice. However, internal choice has provided in all the three questions of five marks category. Only one option in such questions is to be attempted. 4. All questions of sections A and all questions of section B are to be attempted separately. 5. Question number 1 to 4 in section A are one mark questions. These are to be attempted separately. 6. Question number 5 to 13 is two mark Questions, to be answered in about 30 words each. 7. Question number 14 to 22 is three mark Questions, to be answered in about 50 words each. 8. Question number 23 to 25 is five mark Questions, to be answered in about 70 words each. 9. Question number 26 to 41 in section B is multiple choices Question based on Practical skills. Each Question is a one mark Question.


FOR SOLUTIONS KINDLY VISIT

www.pioneermathematics.com PIONEERS EDUCATION (THE BEST WAY TO SUCCESS): S.C.O. 320, SECTOR 40–D, CHANDIGARH SOLUTIONS ON www.pioneermathematics.com → LATEST UPDATES

1



Ph: 9815527721, 4617721

PAPER-I Time : 3 Hrs

MM : 80

SECTION-A 1. What is the SI prefix for each of the following multiple and submultiples of a unit? (a) 103 (b) 10-1 (c) 10-2 (d) 10-6 2. Fill in the blanks (a) In a chemical reaction, the sum of the masses of the reactants and products remains unchanged. This is called ____________. (b) A group of atoms carrying a fixed charge on them is called __________. (c) The formula unit mass of Ca3 (PO4) 2 is _______________. (d) Formula of sodium carbonate is _______and that of ammonium sulphate is ________. 3. Name two egg laying mammals. 4. Name any two groups of micro-organisms from which antibiotics could be extracted. 5. Calculate the average density of the earth in terms of g, G and R. 6. The mass of an empty bucket of capacity 10 litres is 1 kg. Find its mass when completely filled with a liquid relative density 0.8 (given 1m3 = 103 litres) 7. The weight of a person on a planet A is about half that on the earth. He can jump upto 0.4 m height on the surface of the earth. How high he can jump on the planet A? 8. How is the power related to the speed at which a body can be lifted? How many kilograms will a man working at the power of 100 W, be able to lift at constant speed of 1 ms-1 vertically? (g = 10 m s-2) 9. Establish the relationship between speed of sound, its wavelength and frequency. If velocity of sound in air is 340 m s-1, calculate : (i) wavelength when frequency is 256 Hz. (ii) frequency when wavelength is 0.85 m. 10. Why do we hear the sound produced by the humming bees while the sound of vibrations of pendulum is not heard? 11. Why are antibiotics not effective for viral disease? 12. Why does the percentage of gases like oxygen, nitrogen and carbon dioxide remain almost the same in the atmosphere? 13. Will 35Cl and37Cl have different valencies? Justify your answer. 14. Compute the number of ions present in 5.85 g of sodium chloride.

PIONEERS EDUCATION (THE BEST WAY TO SUCCESS): S.C.O. 320, SECTOR 40–D, CHANDIGARH SOLUTIONS ON www.pioneermathematics.com → LATEST UPDATES

2



Ph: 9815527721, 4617721

15. A sample of ethane (C2 H6) gas has the same mass as 1.5 × 1020 molecules of methane (CH4 ) . How many C2H6 molecules does the sample of gas contain?

16. (a) An element X has a mass number 4 and atomic number 2. Write the valency of this element? (b) Calculate the number of neutrons present in the nucleus of an element X which is represented as 31 15 X . 17. Define the terms and give one example of each (a) Bilateral symmetry (b) Coelom (c) Triploblastic 18. Differentiate between cold blooded & warm blooded animals by giving two examples of each also. 19. What is power? How do you differentiate kilowatt from kilowatt hour? The Jog Falls in Karnataka state are nearly 20 m high. 2000 tonnes of water falls from it in a minute. Calculate the equivalent power if all this energy can be utilized? (g =10 ms-2) 20. What do you mean by : (a) Nitrification (b) Water pollution (c) Ammonification 21. What is a disease? How many types of diseases have you studied? Give examples. 22. A boy is moving moving on a straight road against a frictional force of 5N. After traveling a distance of 1.5 km he forgot the correct path at a round about of radius 100 m. However, he moves on the circular path for one and half cycle and then he moves forward upto 2.0 km. Calculate the work done by him. 23. (a) Prove that total mechanical energy of a freely falling body always remains constant. (b) Why is the ceiling and wall behind the stage of good conference halls or concert halls made curved? Or (a) The velocity of a body moving in a straight line increased by applying a constant force F, for some distance in the direction of the motion. Prove that the increase in the kinetic energy of the body is equal to the work done by the force on the body. (b) A girl having mass of 35 kg sits on a trolley of mass 5 kg. The trolley is given an initial velocity of 4 m s-1 by applying a force. The trolley comes to rest after traversing a distance of 16 m. (a) How much work is done on the trolley? (b) How much work is done by the girl?


3



Ph: 9815527721, 4617721

24. (a) Raunak took 5 moles of carbon atoms in container and Krish also took 5 moles of sodium atoms in another container of same weight. (a) Whose container is heavier? (b) Whose container has more number of atoms? (b) What are ionic and molecular compounds? Give examples. Or (a) In what way is the Rutherford’s atomic model different from that of Thomson’s atomic model? (b) What are the postulates of Bohr’s model of an atom? 25. (a) Why do we keep both snake and turtle in the same class? (b) Classify Rohu, Scolidon, Flying lizard, King Kobra, Frog, Salamander, Ostrich, Pigeon, Bat, Crocodile and Whale into the cold blooded/warm blooded animals. Or (a) Give three characteristic features each of coelenterates and Pisces. (b) Give the mechanism of action of antibiotics (c) Define interferons

SECTION-B 26. Which of the following statements is not true about an atom? (a) Atoms are not able to exist independently (b) Atoms are the basic units from which molecules and ions are formed (c) Atoms are always neutral in nature (d) Atoms aggregate in large numbers to form the matter that we can see, feel or touch 27. Which of the following represents a correct chemical formula? Name it. (a) CaCl (b) BiPO4 (c) NaSO4 (d) NaS 28. The number of electrons in an element X is 15 and the number of neutrons is 16. Which of the following is the correct representation of the element? (a) 31 (b) 31 (c) 16 (d) 15 15 X 16 X 15 X 16 X 29. In the Thomson’s model of atom, which of the following statements are correct? (i) the mass of the atom is assumed to be uniformly distributed over the atom (ii) the positive charge is assumed to be uniformly distributed over the atom (iii) the electrons are uniformly distributed in the positively charged sphere (iv) the electrons attract each other to stabilize the atom (a) (i) , (ii) and (iii) (b) (i) and (iii) (c) (i) and (iv) (d) (i) , (iii) and (iv) 30. Organisms without nucleus and cell organelles belong to (i) fungi (ii) protista (iii)cyano bacteria (iv) archae bacteria (a) (i) and (ii) (b) (iii) and (iv) (c) (i) and (iv) (d) (ii) and (iii) PIONEERS EDUCATION (THE BEST WAY TO SUCCESS): S.C.O. 320, SECTOR 40–D, CHANDIGARH SOLUTIONS ON www.pioneermathematics.com → LATEST UPDATES

4



Ph: 9815527721, 4617721

31. Which among the following have scales? (i) Amphibians (ii) Pisces (iii) Reptiles (iv) Mammals (a) (i) and (iii) (b) (iii) and (iv) (c) (ii) and (iii) (d) (i) and (ii) 32. Corals are (a) Poriferans attached to some solid support (b) Cnidarians, that are solitary living (c) Poriferans present at the sea bed (d) Cnidarians that live in colonies 33. A car is accelerated on a leveled road and attains velocity 4times of its initial velocity. In this process the potential energy of the car (a) does not change (b) becomes twice to that of initial (c) becomes 4 times that of initial (d) becomes 16 times that of initial 34. Which one of the following disease is caused by bacteria? (a) Typhoid (b) Anthrax (c) Tuberculosis (d) Malaria 35. Which one of the following has a long terms effect on the health of an individual? (a) Common cold (b) Chicken pox (c) Chewing tobacco (d) stress 36. Making anti-viral drugs is more difficult tan making anti-bacterial medicines because (a) viruses make use of host machinery (b) viruses are on the border line of living and non-living (c) viruses have very few biochemical mechanisms of their own (d) viruses have a protein coat 37. You are aware of Polio Eradication Programme in your city. Children are vaccinated because (a) vaccination kills the polio causing microorganisms (b) prevents the entry of polio causing organism (c) it creates immunity in the body (d) all the above 38. Vectors can be defined as (a) animals carry the infecting agents from sick person to another healthy person (b) microorganisms which cause many diseases (c) infected person (d) diseased plants 39. The nitrogen molecules present in air can be converted into nitrates and nitrites by (a) a biological process of nitrogen fixing bacteria present in soil (b) a biological process of carbon fixing factor present in soil (b) any of the industries manufacturing nitrogenous compounds (d) the plants used as cereal crops in field


5



Ph: 9815527721, 4617721

40. Choose the correct sequences (a) CO2 in atmosphere → decomposers → organic carbon in animals → organic carbon in plants (b) CO2 in atmosphere → organic carbon in plants → organic carbon in animals

→ inorganic carbon in soil (c) Inorganic carbonates in water → organic carbon in plants → organic carbon in animals → scavengers (d) Organic carbon in animals → decomposers → CO2 in atmosphere → organic carbon in plants 41. When we breathe in air, nitrogen also goes inside along with oxygen. ? What is the fate of this nitrogen ? (a) It moves along with oxygen into the cells(b) It comes out with the CO2 during exhalation (c) It is absorbed only by the nasal cells (d) Nitrogen concentration is already more in the cells so it is not at all absorbed.


6



Ph: 9815527721, 4617721

PAPER-II SECTION – A (Instruction are same as for the paper-I)

1. An ion X2+ contains 18 electrons and 20 neutrons. Calculate the atomic number and mass number of element X. Name the element X. 2. What is biogeochemical cycle? 3. Which part of solar radiation is absorbed by ozone layer? 4. Name two gases which cause greenhouse effect. 5. A piece of ice is gently placed on the surface of water filled in glass tumbler, so the water rises to the brim. What will happen to the level of water when the ice melts? Will the water overflow? If not, explain with reason. 6. Which characteristic of the sound helps you to identify your friend by his voice while sitting with others in a darkroom? Define it. 7. What are the four main characteristics of chordates? 8. Write down the main difference in the skin of Pisces, amphibians and reptiles. 9. (a) State the law of conservation of mass. (b) What mass of silver nitrate will react with 5.85 g of sodium chloride to produce 14.35 g of silver chloride and 8.5 g of sodium nitrate, if the law of conservation of mass is true? 10. What is vaccination? How is it different from the treatment of a disease? 11. Calculate the number of aluminum ions present in 0.051 g of aluminum oxide. 12. Mass of body ‘A’ is equal to mass of body ‘B’. If the density of body ‘A’ is greater than the density of body ‘B’, which is easier to lift through air? 13. Calculate the molecular mass of the following compounds : (i) NH4NO3 (ii) H2SO4 (iii) Na2CO3 (iv) NaOH

(v) HNO3

(vi) Al2(SO4 )3

14. How do antibiotics work against bacteria? Do they have any effect on human cells also? Explain. 15. In which phylum one can see the following structures? Give their function Also. (i) Ostia (ii) Nematocysts (iii) Flame cell (iv) Setae (v) Malpighian tubules (vi) Ctenidia. 16. Calculate the mass of the following : (i) 0.5 mole of N2 gas (mass from mole of molecule) (ii) 0.5 mole of N atoms (mass from mole of atom) (iii) 3.011×1023 number of N atoms (mass from number)


7



Ph: 9815527721, 4617721

−1

17. A sound wave travels at a speed of 339 ms . If its wavelength is 1.5 cm, what is the frequency of the wave? Will it be audible? 18. A person as a hearing range from 20 Hz to 20 kHz. What are the typical wavelengths of sound waves in air corresponding to these two frequencies? Take the speed of sound in air as 344 m s−1 . 19. Define the following terms: (a) Valence electrons (b) Valency (c) Ion (d) Anion (e) Cation (f) Polyatomic ions. 20. Calculate the percentage of hydrogen, nitrogen and oxygen in 1 mole of nitric acid. [Mass of = lu, N = 14 u, O = 16u] 21. The average atomic mass of a sample of an element X is 16.2 u. What are the 16

18

percentage of isotopes 8 x and 8 x in the sample? 22. (a)Two astronauts cannot hear each other on the moon. Why? (b) What do the species 31 A and 32 B represent? 23. (i) When an arrow is shot from its bow, it has kinetic energy. From where does it get the kinetic energy? (ii) What happens to the kinetic energy when : (a) The mass of the body is doubled at constant velocity? (b) The velocity of the body is doubled at constant mass? (c) The mass of the body is doubled but the velocity is reduced to half? Or Explain the law of conservation of energy. And also explain the work done when a force ‘F’ is applied to bring some changer in the speed of a moving body? 24. (a) What are valence electrons? What is their significance? (b) Give the main features of Bohr’s model of an atom. Or (a) Define mass number. How is mass number related to the protons and neutrons present in the nucleus of the atom? (b) What is meant by Bohr-Bury Scheme? Explain.

25.(a) What causes smog? What does it indicate? (b) What are the three different ways of nitrogen fixation? Or (a) Define the following terms : (i) Biological magnification. (ii) Nitrification. (b) What is the significance of dissolved oxygen to the aquatic organisms? How does it get depleted? PIONEERS EDUCATION (THE BEST WAY TO SUCCESS): S.C.O. 320, SECTOR 40–D, CHANDIGARH SOLUTIONS ON www.pioneermathematics.com → LATEST UPDATES

8



Ph: 9815527721, 4617721

Section-B 26. Which of the following graphs correctly represents the relation between the angle of incidence and the angle of reflection for a sound wave?

(1) A (2) B (3) C (4) D. 27. A sound wave is incident normally on a reflecting plane surface. The angle of reflection of the sound wave will be : (1) 900 (2) 450 (3) 00 (4) 1800 28. In case of reflection of sound: (1) angle of incidence is not related to the angle of reflection. (2) angle of incidence is equal to the angle of reflection. (3) angle of incidence is greater than the angle of reflection. (4) angle of incidence is less than the angle of reflection. 29. Reading for water level in a measuring cylinder before a solid is immersed is 40 ml and after the solid immersed it is 60 ml. The volume of the solid is: (1) 40 ml (2) 20 ml (3) 60 ml (4)100 ml 30. The mass of a solid iron cube of side 4 cm is to be determined. Of the four spring balances available, the one best suited for this purpose, would have : (1) range = 0 to 100 g, and least count = 1 g. (2) range = 0 to 100 g, and least count = 5 g. (3) range = 0 to 1000g, and least count = 10 g. (4) range = 0 to 1000 g, and least count = 25 g. 31. On immersing body fully in q liquid, the apparent loss in weight is : (1) more in a denser liquid (2) independent of the density of the liquid (3) less in a denser liquid (4) more in lighter 32. A body of mass 120 kg and density 600 m-3 floats in water. The additional mass to be added to the body so that the body does not sink is : (1) 20 kg (2) 80 kg (3) 100 kg (4) 120 kg 33. While doing an experiment on establishing the relation between the loss in weight of a solid when immersed in tap water, with the weight of water displaced by it, a student records the following observations: Weight of solid in air = W1 Apparent weight of solid when fully immersed in tap water = W2 Weight of water displaced by the solid = W3 The student would observe that : (1) W1 = W3 (2) W2 = W3 (3) W1 = W2+W3 (4) W2= W3+W1. PIONEERS EDUCATION (THE BEST WAY TO SUCCESS): S.C.O. 320, SECTOR 40–D, CHANDIGARH SOLUTIONS ON www.pioneermathematics.com → LATEST UPDATES

9



Ph: 9815527721, 4617721

34. Two students ‘A’ and ‘B’ walk on ice wearing shoes. Student ‘A’ wars wide base shoes and student ‘B’ wears narrow base shoes while walking. If both the students have equal weight, who will be able to walk easily and comfortably? (1) Student A (2) student B (3) both student A and B (4) neither student A nor B. 35. In the wave shown below, what does the shaded portion show?

(1) wavelength (2) velocity of wave (3) frequency of wave (4) none of these 36. While doing the experiment on measuring the velocity of a pulse through a stretched string, a student had to choose between using a : (i) thick silk string and a thick cotton string. (ii) stop clock and a table clock. The combination choice that he should prefer is : (1) silk string and the table-clock (2) silk string and the stop clock (3) cotton string the table clock (4) cotton string and the stop clock. 37. In which phylum/class one can find pneumatic bones : (1) phylum arthropoda (2) class aves (3)class reptilian (4)class amphibia 38. In which phylum true body cavity is present? (1) phylum coelenterate (2) phylum nematode (3) phylum annelid (4) all of these 39. The number of chambers presents in the heart of fishes and birds are: (1) Two cambered in both. (2) Four chambered in both. (3) Two chambered in fishes and four chambered in birds. (4) Four chambered in fishes and two chambered in birds. 40. The respiratory organs which help in exchange of gases in the case of a bony fish and cockroach are ; (1) gills in both (2) spiracles in both (3) gills in a bony fish and spiracles in a cockroach (4) gills in a cockroach and spiracles in a bony fish. 41. Both the male and female cones are present in pine plants which belong to gymnosperms. How will you distinguish male cones from female cones? (1) Male cones are smaller than female cones. (2) Male cones are bigger than female cones. (3) Male cones are brighter than female cones. (4) Male cones are dull than female cones.

GOOD LUCK PIONEERS EDUCATION (THE BEST WAY TO SUCCESS): S.C.O. 320, SECTOR 40–D, CHANDIGARH SOLUTIONS ON www.pioneermathematics.com → LATEST UPDATES

10



Ph: 9815527721, 4617721


11



Ph: 9815527721, 4617721

Online services [

(9th,

10th,

+1, +2, CBSE, ICSE, IIT-JEE, AIEEE, SAT, NTSE, OLYMPIAD)

Ask a teacher.

NCERT solutions.

Discussion of R.D. Sharma, R.S. Aggarwal etc.

Discussion of T.M.H., A. Das Gupta, S. L. Loney, Hall & knight, Thomas Finney etc.

Mathematics Olympiad (RMO, INMO, IMO).

Objective chapter wise tests with immediate result & review.

Objective practice + smart solutions.

Vedic mathematics (Meaningful & applicable).

Test series for IIT-JEE and AIEEE.

IIT-JEE sure shot Tips & Tricks.

AIEEE (Twisters, Tips & Tricks).

Boards, IIT-JEE, AIEEE previous year papers and solutions.

Latest sample papers for boards, IIT-JEE & AIEEE.

Correspondence course (9th/10th CBSE/ICSE SA-I, SA-II, +1, +2 IIT-JEE, AIEEE)

Self study material (For AIEEE + IIT-JEE).

Maths projects.

Personality development, IQ sharpeners, jokes etc.

And many more…………

L.K.Gupta (M.Sc. Mathematics) Introduces

www.pioneermathematics.com (Individual Approach Guaranteed)


12