Multiple Choice Question on Basic Concept of Science Class IX Standard Practice Test 6
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This is a set of multiple choice questions of basic concept of general science for competitive examination
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Sr No Question Answer Remarks 1 What is matter? which occupies mass and volume Matter is the one which occupy space and have mass; and therefore in other words they have both mass and volume 2 The rate of evaporation depends on the following factors besides temperature and humidity surface area and wind speed For evaporation, surface area and winds helps in providing energy to the particles in touch with the air to gain energy to change its state. Wind speed and pressure are the same as if the pressure is more , wind speed will be less. 3 40 g of common salt is mixed in 400 g of water. What is the concentration of salt in terms of mass percentage? 0.0909 (40*100)/440=9.09% 4 5 The formula for deriving the number of electrons in an orbit is given by 2n² Energy level is given 1,2,3 … and with shell letter as K, L, M, P, N… and maximum number of electrons as 2, 8, 18, 32, 50, 72 etc. with certain conditions such as maximum 8 electrons in the outer most orbit. 6 The main constituent of cell wall is cellulose The cell wall is a tough, flexible and sometimes rigid layer that surrounds some types of cells. It surrounds the cell membrane and provides these cells with structural support and protection. In addition, the cell wall acts as a filtering mechanism. A major function of the cell wall is to act as a pressure vessel, preventing over expansion when water enters the cell. Cell walls are found in plants, fungi and prokaryotic cells but not in mycoplasmas Cellulose possess the property to meet this criteria. The composition of the cell wall varies between species and may depend on cell type and developmental stage 7 The waste disposal function of the cell is performed by lysosomes 
8 Name the tissue which connects muscle with bones in human tendon 9 While travelling in a bus and driver applying sudden brake, your body will try to fall forward During the time the bus was in motion, your body was also in forward motion. There is delay in experiencing the sudden stop of the bus by the body and it will continue to be in motion and thus fall forward. Similarly when the bus starts, your body will have a tendency to fall backward 10 As per Newton’s second law of motion, the rate of change of momentum is directly proportional to the acceleration 
11 When a driver jumps of a bus, it does not move backward whereas if the same person jumps from boat, it moves backward even when the weight of both the same coefficient of friction in case of boat is less then bus The resultant reaction during jumping on bus and boat is same but as the coefficient of friction is less in case of boat, it moves backward. The jumping trajectory is always such that it has vertical as well horizontal component. 12 Two persons just manage to move a car weighing 1200 Kg at a uniform speed on a level road. When third person is added, the car moves at a uniform acceleration of 0.2 m/s². Find the force imparted by the person. Consider equal effort by each of the person. 240 N Consider the effort applied by each person is F, than 2F is used only to counter the frictional force. When third person comes, 1200*0.2=240 N force is applied for the said acceleration. Therefore total force 3*240=720 N and 240 by each one. 13 A stone moving in at a uniform speed in a circular path. The acceleration of the stone is towards the center of the circle It is the centripetal acceleration towards the center of the circle which keeps the stone moving even with uniform speed. 14 A stone is allowed to fall freely from a cliff 100 m high and at the same time another stone is thrown vertically upward at a velocity of 25 m/s. What time they will meet? 4 sec Let it meet after time T and during this period, distance travelled by top stone is A and bottom one is B. Than A+B=100 m. A=½gt² and B=25t-½gt²; from this we get 100=25t and t=4 secs 15 A porter lifts a luggage weighing 25 Kg for a height of 1.5 m and keeps on his head. What work is done by him? 368 N-m mgh=25*9.81*1.5=368 N-m 16 How is frequency, wave length and speed are related to each other? Speed = Wavelength*Frequency 17 This is not a advantage of sound waves Barkhausen testing barkhausen testing is based on electromagnetic waves. 18 Green plants of an eco system is called producer 19 Animals are divided in how many groups? 10 20 Which of the following process is not involved in carbon cycle? transpiration Transpiration is the process in which the plant absorbs water through the plant root and then adds to the humidity of the environment -
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Question 1 of 20
1. Question
What is matter?
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Question 2 of 20
2. Question
The rate of evaporation depends on the following factors besides temperature and humidity
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Question 3 of 20
3. Question
40 g of common salt is mixed in 400 g of water. What is the concentration of salt in terms of mass percentage?
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Question 4 of 20
4. Question
The formula for deriving the number of electrons in an orbit is given by
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Question 5 of 20
5. Question
The main constituent of cell wall is
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Question 6 of 20
6. Question
The waste disposal function of the cell is performed by
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Question 7 of 20
7. Question
Name the tissue which connects muscle with bones in human
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Question 8 of 20
8. Question
While travelling in a bus and driver applying sudden brake, your body will try to
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Question 9 of 20
9. Question
As per Newton’s second law of motion,
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Question 10 of 20
10. Question
When a driver jumps of a bus, it does not move backward whereas if the same person jumps from boat, it moves backward even when the weight of both the same
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Question 11 of 20
11. Question
A stone moving in at a uniform speed in a circular path. The acceleration of the stone is
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Question 12 of 20
12. Question
A stone is allowed to fall freely from a cliff 100 m high and at the same time another stone is thrown vertically upward at a velocity of 25 m/s. What time they will meet?
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Question 13 of 20
13. Question
A porter lifts a luggage weighing 25 Kg for a height of 1.5 m and keeps on his head. What work is done by him?
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Question 14 of 20
14. Question
How is frequency, wave length and speed are related to each other?
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Question 15 of 20
15. Question
This is not a advantage of sound waves
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Question 16 of 20
16. Question
Green plants of an eco system is called
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Question 17 of 20
17. Question
Animals are divided in how many groups?
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Question 18 of 20
18. Question
Which of the following process is not involved in carbon cycle?
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Question 19 of 20
19. Question
The average weight of Shri Mohan Rakesh, the astronaut was 66 kg before starting his journey to moon. What will be his weight on moon?
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Question 20 of 20
20. Question
This is not a way to avoid soil erosion
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Very useful MCQstx a lot