Multiple Choice Question on Basic Concept of Science Class X Standard Practice Test 7
Last updated on July 26th, 2015 at 03:40 am
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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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The Answer Key:
Sr No Question Answer Remarks 1 The SI unit of large weight of a body is Newton Weight is the gravitational force acting on a body and is determined as m*g with unit as that of force i.e. Newton. SI unit of mass is Kg. The weight of a body remains constant throughout on earth as g is constant, meaning thereby that W is proportional to m and for this reason, weight is used commonly for mass. 2 What are the essential property of an item to be called a matter is made up of particle which has has mass, volume, space, force between them and energy 3 The motion is said to be uniform when the acceleration is zero The acceleration has be zero means the speed not increasing and motion takes place at a uniform speed with any change in the speed. However, in actual practice some acceleration is required to compensate the retarding force arising out due to surface/air friction. 4 An artificial satellite is moving in a circular orbit of radius 42250 Km and takes 24 hours to complete one revolution. What will be its linear velocity? 3073 m/s Linear velocity = 2π*r/t = 2*22*42250*1000/7*24*60*60=3073 m/sec 5 The process of converting gas into solid state directly is called sublimation Change of state from solid to gas and back to solid is called sublimation. Fusion is from solid to liquid and liquid to solid is solidification. Liquid to gas to evaporation whereas gas to liquid to condensation. 6 The technique used for separating drug from blood is Chromatography Chromatography is a separation technique used to separate the different components in a liquid mixture. It was introduced by a Russian Scientist Michael Tswett. Chromatography involves the sample being dissolved in a particular solvent called mobile phase. The mobile phase may be a gas or liquid. The mobile phase is then passed through another phase called stationary phase. The stationary phase may be a solid packed in a glass plate or a piece of chromatography paper. 7 What is the molecular mass of nitric acid 63 Formula of Nitric Acid is HNO3 and molecular mass will be calculated as sum of atomic mass of the constituents as 1+14+3*16=63 8 Elements are defined as the number of proton it possess 9 What is a tissue? A groups of cells which is meant for a specific task is called tissue Tissue and Division of Labour: In complex organisms, different tasks are carried out by different organs and organ systems. Tissues are the first step towards division of labour in complex organisms. A groups of cells which is meant for a specific task is called tissue. 10 The disease not caused by virus is tuberculosis The disease caused by virus is one in which the virus dies by itself and no medicine services the purpose. 11 The work done in lifting 1 Kg of mass for a distance of 1 m is equal to 9.81 Joules The force acting on the body down ward is 1 Kg*g=9.81 N and the work done is F*S=9.81 N-m or Joule 12 The instrument used for the measurement of current is called Ammeter Voltmeter-voltage, Ammeter-current, Galvanometer: Charge, Potentiometer: Potential difference 13 The tendency of the object to remain at rest or keep on moving with the same velocity is defined by Inertia Inertia is the mass of the object. For any motion we always take mass of the object and when under the influence of gravity, the force applied on the object is weight i.e. mg. 14 Each living cell has got a certain specific components within it called organelle 15 The value of gravitational acceleration at poles is higher Our actual earth has a polar radius of about 6.3568 x 106 m and slightly longer equatorial radius of about 6.3781 x 106 m. Using those values, it can be calculated that gravitational accelerations of about 9.87 m/s2 for the poles and about 9.80 m/s2 for the equator of our perfect spinning earth. 16 Potassium permanganate when dissolved gives what color? pink The chemical formula is KMnO4 is having highly oxidising property and used wherever such property is to be used such as fruit preservation, water treatment, analytic purpose. 17 In a motion, the average velocity found to same as that of the average speed. The motion is said to be a straight line The straight line motion is having velocity and speed same. In circular motion, the direction vector is always changing. Here distractor of all in fourth option is used to create confusion in the mind of candidate. 18 Matter exists in how many states? 5 Matter exits in five state namely solid, liquid, gas, plasma and Bose Einstein Condensate. In day to day affair, we observe only three states i.e. solid, liquid and gas 19 Percentage of oxygen in air is around 0.21 The composition of air is nitrogen = 78%, oxygen = 20.9%, argon = 0.8% 20 Avogadro number is a fixed number equal to 6.022*1023 defines the number of moles of what in 1 mole of any substance all The number of particles i.e. atom, molecules or ions present in 1 mole of any substance is fixed, with a value of 6.022*1023. This is an experimentally obtained value and called Avogadro Constant. The mass of 1 mole of a particular substance is always constant. It is equal to sum total of relative masses of atoms or molecules in grams. 21 Plant tissues are of two types of which one is Meristematic and what is the second one? Permanent Tissue Plant tissues are of two main types, viz. meristematic tissue and permanent tissue. The distracters mentioned are types of meristematic type of tissue. 22 The disease not cased by bacteria is Polio The bacterial infection requires medication to kill the bacteria causing the disease for which anti-bacterial drugs are generally given 23 An object moving with a velocity of 5 m/sec possess an energy of 25 J. What will be its energy if the velocity is doubled? 100 J 1/2*m*25=25; m = 2 Kg, 1/2*2*100=100 J 24 The voltage is derived from the formula, where q, W and t are charge, work done and time respectively. W/q q/t is current whereas the other two terms are not a valid term. 25 For a uniformly accelerated objects, the distance travelled is proportional to the square of time We know S=(½)*a*t2. This law was derived by Galileo while observing falling bodies. -
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Question 1 of 25
1. Question
The SI unit of large weight of a body is
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Question 2 of 25
2. Question
What are the essential property of an item to be called a matter
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Question 3 of 25
3. Question
The motion is said to be uniform when the acceleration is
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Question 4 of 25
4. Question
An artificial satellite is moving in a circular orbit of radius 42250 Km and takes 24 hours to complete one revolution. What will be its linear velocity?
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Question 5 of 25
5. Question
The process of converting gas into solid state directly is called
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Question 6 of 25
6. Question
The technique used for separating drug from blood is
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Question 7 of 25
7. Question
What is the molecular mass of nitric acid
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Question 8 of 25
8. Question
Elements are defined as the number of
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Question 9 of 25
9. Question
What is a tissue?
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Question 10 of 25
10. Question
The disease not caused by virus is
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Question 11 of 25
11. Question
The work done in lifting 1 Kg of mass for a distance of 1 m is equal to
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Question 12 of 25
12. Question
The instrument used for the measurement of current is called
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Question 13 of 25
13. Question
The tendency of the object to remain at rest or keep on moving with the same velocity is defined by
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Question 14 of 25
14. Question
Each living cell has got a certain specific components within it called
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Question 15 of 25
15. Question
The value of gravitational acceleration at poles is
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Question 16 of 25
16. Question
Potassium permanganate when dissolved in water gives what color?
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Question 17 of 25
17. Question
In a motion, the average velocity found to same as that of the average speed. The motion is said to be
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Question 18 of 25
18. Question
Matter exists in how many states?
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Question 19 of 25
19. Question
Percentage of oxygen in air is around
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Question 20 of 25
20. Question
Avogadro number is a fixed number equal to 6.022*1023 defines the number of moles of what in 1 mole of any substance
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Question 21 of 25
21. Question
Plant tissues are of two types of which one is Meristematic and what is the second one?
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Question 22 of 25
22. Question
The disease not cased by bacteria is
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Question 23 of 25
23. Question
An object moving with a velocity of 5 m/sec possess an energy of 25 J. What will be its energy if the velocity is doubled?
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Question 24 of 25
24. Question
The voltage is derived from the formula, where q, W and t are charge, work done and time respectively.
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Question 25 of 25
25. Question
For a uniformly accelerated objects, the distance travelled is proportional to the square of
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