The frequency of a source is 20 kHz. The frequencies of the sound waves produced by it in water and air will A. be the same as that of the source B. depend upon the velocity of the waves in these media C. depend upon the wavelength of the waves in these media D. depend upon the density of the media
4. If the static friction between two surfaces X and Y is found to be 20 N, then the rolling friction between these two surfaces should most likely be: A. 25 N B. 20 N C. 5 N D. 50 N 3
5. When we say 'sound travels in a medium', we mean A. the particles of the medium travel B. the source travels C. the disturbance travels D. the medium travels
6. Which of the following statement incorrectly describe the characteristics of force; A. it may make an object move from rest B. may change the direction of the motion of an object. C. always bring about a change in the shape of an object D. may change the speed of a moving object
7. One of the following substances is neither a good conductor of electricity nor an insulator. This substance is: A. chromium B. germanium C. gallium D. potassium
8. ____ is used to detect the presence of tumors and blood clots in human body. A. Radioactive isotopes B. Carbon allotropes C. Sulphur compounds D. Isotones
9. Anuj has performed an experiment to compare the strength of different fibres. He arranged the set-up as shown in figure: Arrange the threads in order of their increasing strength. A. Nylon < Silk < Cotton B. Silk < Cotton < Nylon C. Cotton < Nylon < Silk D. Cotton < Silk < Nylon 4
10. Identify V, W, X, Y and Z in the given venn diagram. A. V-Filling a water bottle, W-withdrawing money from ATM, XBurning a candle, Y-Charging mobile battery, Z-Boiling an egg B. V-Filling a water bottle, W- Charging mobile battery, X-Burning a candle, Y- withdrawing money from ATM, Z-Boiling an egg C. V- Burning a candle, W- Charging mobile battery, X- Filling a water bottle, Y- Boiling an egg, Z- withdrawing money from ATM D. V- Boiling an egg, W- Filling a water bottle, X- withdrawing money from ATM, Y- Charging mobile battery, Z- Burning a candle
11. Potable water is the water which is A. Obtained from a river B. Obtained from a lake C. Pure and fit for drinking D. Used only for washing clothes
12. A circular _________ring is formed when a clean glass plate/slide is introduced into the luminous zone of flame. A. White B. Pink C. Red D. Blackish
13. Shyam and Hari have two identical pieces of marble chips with same mass. They take equal volumes of dil. HCl with the same concentration in two different test tubes. Shyam puts the marble pieces directed into the acid whereas Hari powdered the marble piece and puts it into the test tube. What will be the correct observation made. A. Reaction in Shyam’s test tube will be faster B. Reaction in Hari’s test tube will be faster C. Both reactions will happen with the same speed D. No reaction happens in both the test tube
14. The pair that belongs to the group of organisms showing 70S ribosomes in the cytoplasm is_____ A. Moss and Anabaena B. Yeast and Amoeba C. Bacteria and Nostoc D. Penicillium and Spirogyra 5
15. Hepatitis B is caused by __________ A. Virus B. Bacteria C. Protozoa D. Fungi
16. AIDS can spread from an infected person to another person through i. sharing food ii. blood transfusion iii. sharing comb iv. sexual contact v. infected mother to child via Placenta A. (i) and (ii) only B. (ii) and (iv) only C. (ii), (iv) and (v) D. (i), (ii) and (iv)
17. Who discovered fermentation process? A. Louis Pasteur B. Alexander Fleming C. Edward Jenner D. None of the above
18. Survival of some animals has become difficult because of A. disturbance in rainfall B. disturbance in their natural habitat C. afforestation D. none of these
19. Age of attaining puberty in human females is A. 10-14 years of age B. 45-50 years of age C. Just after the birth D. None of the above
20. Which one of the following statements is True about the storage of produce? i. Harvested grains have less moisture. ii. Farmers store grains in jute bags or metallic bins. iii. Small scale storage of grains is done in silos and granaries iv. Specific chemical treatments are required to protect crops from pests and microorganisms. A. ii only B. i, ii and iv C. ii and iv 6 D. iii and iv
Section B (Mathematics)
Answers
Answer:
for question no. 18 the answer is none of these
If the static friction between two surfaces X and Y is found to be 20 N, then the rolling friction between these two surfaces should most likely be: A. 25 N B. 20 N C. 5 N D. 50 N 3
5. When we say 'sound travels in a medium', we mean A. the particles of the medium travel B. the source travels C. the disturbance travels D. the medium travels
6. Which of the following statement incorrectly describe the characteristics of force; A. it may make an object move from rest B. may change the direction of the motion of an object. C. always bring about a change in the shape of an object D. may change the speed of a moving object
7. One of the following substances is neither a good conductor of electricity nor an insulator. This substance is: A. chromium B. germanium C. gallium D. potassium
8. ____ is used to detect the presence of tumors and blood clots in human body. A. Radioactive isotopes B. Carbon allotropes C. Sulphur compounds D. Isotones
9. Anuj has performed an experiment to compare the strength of different fibres. He arranged the set-up as shown in figure: Arrange the threads in order of their increasing strength. A. Nylon < Silk < Cotton B. Silk < Cotton < Nylon C. Cotton < Nylon < Silk D. Cotton < Silk < Nylon 4
If the static friction between two surfaces X and Y is found to be 20 N, then the rolling friction between these two surfaces should most likely be: A. 25 N B. 20 N C. 5 N D. 50 N 3
5. When we say 'sound travels in a medium', we mean A. the particles of the medium travel B. the source travels C. the disturbance travels D. the medium travels
6. Which of the following statement incorrectly describe the characteristics of force; A. it may make an object move from rest B. may change the direction of the motion of an object. C. always bring about a change in the shape of an object D. may change the speed of a moving object
7. One of the following substances is neither a good conductor of electricity nor an insulator. This substance is: A. chromium B. germanium C. gallium D. potassium
8. ____ is used to detect the presence of tumors and blood clots in human body. A. Radioactive isotopes B. Carbon allotropes C. Sulphur compounds D. Isotones
9. Anuj has performed an experiment to compare the strength of different fibres. He arranged the set-up as shown in figure: Arrange the threads in order of their increasing strength. A. Nylon < Silk < Cotton B. Silk < Cotton < Nylon C. Cotton < Nylon < Silk D. Cotton < Silk < Nylon 4
If the static friction between two surfaces X and Y is found to be 20 N, then the rolling friction between these two surfaces should most likely be: A. 25 N B. 20 N C. 5 N D. 50 N 3
5. When we say 'sound travels in a medium', we mean A. the particles of the medium travel B. the source travels C. the disturbance travels D. the medium travels
6. Which of the following statement incorrectly describe the characteristics of force; A. it may make an object move from rest B. may change the direction of the motion of an object. C. always bring about a change in the shape of an object D. may change the speed of a moving object
7. One of the following substances is neither a good conductor of electricity nor an insulator. This substance is: A. chromium B. germanium C. gallium D. potassium
8. ____ is used to detect the presence of tumors and blood clots in human body. A. Radioactive isotopes B. Carbon allotropes C. Sulphur compounds D. Isotones
9. Anuj has performed an experiment to compare the strength of different fibres. He arranged the set-up as shown in figure: Arrange the threads in order of their increasing strength. A. Nylon < Silk < Cotton B. Silk < Cotton < Nylon C. Cotton < Nylon < Silk D. Cotton < Silk < Nylon 4
If the static friction between two surfaces X and Y is found to be 20 N, then the rolling friction between these two surfaces should most likely be: A. 25 N B. 20 N C. 5 N D. 50 N 3
5. When we say 'sound travels in a medium', we mean A. the particles of the medium travel B. the source travels C. the disturbance travels D. the medium travels
6. Which of the following statement incorrectly describe the characteristics of force; A. it may make an object move from rest B. may change the direction of the motion of an object. C. always bring about a change in the shape of an object D. may change the speed of a moving object
7. One of the following substances is neither a good conductor of electricity nor an insulator. This substance is: A. chromium B. germanium C. gallium D. potassium
8. ____ is used to detect the presence of tumors and blood clots in human body. A. Radioactive isotopes B. Carbon allotropes C. Sulphur compounds D. Isotones
9. Anuj has performed an experiment to compare the strength of different fibres. He arranged the set-up as shown in figure: Arrange the threads in order of their increasing strength. A. Nylon < Silk < Cotton B. Silk < Cotton < Nylon C. Cotton < Nylon < Silk D. Cotton < Silk < Nylon 4
If the static friction between two surfaces X and Y is found to be 20 N, then the rolling friction between these two surfaces should most likely be: A. 25 N B. 20 N C. 5 N D. 50 N 3
5. When we say 'sound travels in a medium', we mean A. the particles of the medium travel B. the source travels C. the disturbance travels D. the medium travels
6. Which of the following statement incorrectly describe the characteristics of force; A. it may make an object move from rest B. may change the direction of the motion of an object. C. always bring about a change in the shape of an object D. may change the speed of a moving object
7. One of the following substances is neither a good conductor of electricity nor an insulator. This substance is: A. chromium B. germanium C. gallium D. potassium
8. ____ is used to detect the presence of tumors and blood clots in human body. A. Radioactive isotopes B. Carbon allotropes C. Sulphur compounds D. Isotones
9. Anuj has performed an experiment to compare the strength of different fibres. He arranged the set-up as shown in figure: Arrange the threads in order of their increasing strength. A. Nylon < Silk < Cotton B. Silk < Cotton < Nylon C. Cotton < Nylon < Silk D. Cotton < Silk < Nylon 4
If the static friction between two surfaces X and Y is found to be 20 N, then the rolling friction between these two surfaces should most likely be: A. 25 N B. 20 N C. 5 N D. 50 N 3
5. When we say 'sound travels in a medium', we mean A. the particles of the medium travel B. the source travels C. the disturbance travels D. the medium travels
6. Which of the following statement incorrectly describe the characteristics of force; A. it may make an object move from rest B. may change the direction of the motion of an object. C. always bring about a change in the shape of an object D. may change the speed of a moving object
7. One of the following substances is neither a good conductor of electricity nor an insulator. This substance is: A. chromium B. germanium C. gallium D. potassium
8. ____ is used to detect the presence of tumors and blood clots in human body. A. Radioactive isotopes B. Carbon allotropes C. Sulphur compounds D. Isotones
9. Anuj has performed an experiment to compare the strength of different fibres. He arranged the set-up as shown in figure: Arrange the threads in order of their increasing strength. A. Nylon < Silk < Cotton B. Silk < Cotton < Nylon C. Cotton < Nylon < Silk D. Cotton < Silk < Nylon 4
If the static friction between two surfaces X and Y is found to be 20 N, then the rolling friction between these two surfaces should most likely be: A. 25 N B. 20 N C. 5 N D. 50 N 3
5. When we say 'sound travels in a medium', we mean A. the particles of the medium travel B. the source travels C. the disturbance travels D. the medium travels
6. Which of the following statement incorrectly describe the characteristics of force; A. it may make an object move from rest B. may change the direction of the motion of an object. C. always bring about a change in the shape of an object D. may change the speed of a moving object
7. One of the following substances is neither a good conductor of electricity nor an insulator. This substance is: A. chromium B. germanium C. gallium D. potassium
8. ____ is used to detect the presence of tumors and blood clots in human body. A. Radioactive isotopes B. Carbon allotropes C. Sulphur compounds D. Isotones
9. Anuj has performed an experiment to compare the strength of different fibres. He arranged the set-up as shown in figure: Arrange the threads in order of their increasing strength. A. Nylon < Silk < Cotton B. Silk < Cotton < Nylon C. Cotton < Nylon < Silk D. Cotton < Silk < Nylon 4