Multiple Choice Question on Basic Concept of Science Class X Standard Practice Test 4
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This is a mock drill question bank on Basic Concept of Science of Class X standard for those appearing in JE RRB examination. The question bank consists of 21 questions with clock set for 20 minutes. After you finish the test, press Quiz Finish and you will get the answer sheet, your result and its comparison with others. You will also be given remarks containing the explanation about the answer and also about the distracters (other options) to build confidence on the subject. You will also learn techniques to handle distractors because it is known only to person who has the experience of constructing multiple choice questions.
Always remember that the Mock Drill is to understand how your brain works in handling different pressure and the way distractors are constructed.Use these learning to correct your approach.
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The Answer Key:
Sr No Question Answer Remarks 1 Decomposition of vegetable matters into compost is an exothermic process During decomposition heat is released and thus it is exothermic reaction 2 Endothermic reaction uses energy in any of the form all Energy not only in the form heat but in any form including electric current used during a reaction is called endothermic reaction. Electric current is also used. 3 Human stomach produces which acid for the purpose of digestion HCl 4 Which of the metal is most reactive Potassium The order of reactivity is K, Na, Ca and Mg, Al, Zn, Fe, Pb etc. 5 Copper article becomes greenish when exposed to environment due to formation of Copper carbonate layer 6 Graphite is allotropes of carbon used in pencil and softness is derived due to hexagonal strucutre Three atoms of carbon are held with hexagonal structure and the fourth by a double bond. One layer of structure slips over the other making the pencil to work. 7 How many carbon atoms and which functional group forms Butanone 4-ketone Remember Carbon 1-Methane, 2- Ethane, 3- Propane, 4- Butane; and e is replaced by one means it is ketone therefore 4-ketone. 8 The metals existing on the left side of a periodic table are electro-positive in nature The electropostive elements is having a tendency to loose electrons easily. 9 What are common chemical reactions keep on going in living organism? oxidising and reducing 10 The food from the stomach moves first to small intestine 11 What is the function of blood platelets? plug the blood leaks Platelets helps in plugging leaks by clotting the blood at the point of injury. These are small size of about 20% of the blood cells and in the ratio of 1:10 to 1:20 ratio. 12 The gap between two neurons is called a synapse 13 If the speed of light in vacuum is c and in medium v, than the refractive index of the medium is given as c/v The refractive index of any medium other than vacuum is always greater than one. The speed through any medium will always reduce as compared to vacuum in which it is the maximum 14 The splitting of light into seven colours is called dispersion Splitting of colours is called dispersion. Refraction is bending of light depending on the media and reflection is returning of the light beam back. Whereas scattering results on the size of the particle. The higher size particle scatters light of mainly longer wavelength. 15 Depletion of ozone layer at higher layer of atmosphere may result non-shielding of UV radiation reaching earth Ozone is a molecule of three atoms of oxygen with chemical formula of O₃ and formed in the higher level atmosphere by breaking oxygen molecule into oxygen atoms which combine with oxygen molecule to form ozone. This ozone protects UV radiation passing to earth which causes skin cancer. 16 Electric potential is defined as work done per unit charge V=W/Q is the fundamental equation of potential derive from the work done by a unit charge for moving from place to another in an electric field. 17 Resistivity of the insulators is of the order of 10^16 18 The magnetic field inside a long straight solenoid carrying current is same at all points 19 What is fossil fuel? which is available below the earth surface Fossil fuels are fuels formed by natural processes such as anaerobic decomposition of buried dead organisms 20 India produces how much electrical energy from wind 15000-25000MW India wind energy production is about 20000MW with future scope of about 45000 MW. The biggest wind farm is at kanyakumari of 380 MW capacity. 21 The reaction of NaCl+AgNO₃ →AgCl+NaNO₃ is a double displacement reaction Cl of Na is replaced by NO₃ and NO₃ of Ag is replaced by Cl means double displacement. -
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Question 1 of 21
1. Question
Decomposition of vegetable matters into compost is
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Question 2 of 21
2. Question
Endothermic reaction uses energy in any of the form
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Question 3 of 21
3. Question
Human stomach produces which acid for the purpose of digestion
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Question 4 of 21
4. Question
Which of the metal is most reactive
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Question 5 of 21
5. Question
Copper article becomes greenish when exposed to environment due to
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Question 6 of 21
6. Question
Graphite is allotropes of carbon used in pencil and softness is derived due to
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Question 7 of 21
7. Question
How many carbon atoms and which functional group forms Butanone
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Question 8 of 21
8. Question
The metals existing on the left side of a periodic table are
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Question 9 of 21
9. Question
What are common chemical reactions keep on going in living organism?
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Question 10 of 21
10. Question
The food from the stomach moves first to
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Question 11 of 21
11. Question
What is the function of blood platelets?
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Question 12 of 21
12. Question
The gap between two neurons is called a
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Question 13 of 21
13. Question
If the speed of light in vacuum is c and in medium v, than the refractive index of the medium is given as
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Question 14 of 21
14. Question
The splitting of light into seven colours is called
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Question 15 of 21
15. Question
Depletion of ozone layer at higher layer of atmosphere may result
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Question 16 of 21
16. Question
Electric potential is defined as
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Question 17 of 21
17. Question
Resistivity of the insulators is of the order of
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Question 18 of 21
18. Question
The magnetic field inside a long straight solenoid carrying current is
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Question 19 of 21
19. Question
What is fossil fuel?
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Question 20 of 21
20. Question
India produces how much electrical energy from wind
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Question 21 of 21
21. Question
The reaction of NaCl+AgNO₃ →AgCl+NaNO₃ is a
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