Mains Science Online Test

1. Which among the following is measured using a Vernier Caliper?
2. Consider the following statements with respect to the Infra-red spectrum:
1. Infra-red waves do not easily get scattered and can pass through fog
2. While Rock salt prism is used in experiments for infra-red spectrum; Quartz prism is used in experiments for ultraviolet radiation
Which among the above is / are correct statements?
3. Which of the following is / are correct statements with respect to the image formed in a plane mirror?

 
  1. Image is always virtual
  2. The distance of image from the mirror is same as the distance between object and mirror
  3. Image is laterally inverted
Select the correct option from the codes given below:
4. With reference to various properties of X-Rays, which among the following statements is / are correct?
1.The Hard X-Rays have a shorter wavelength than the Soft X-Rays
2.The X-Rays are deflected by the Electric Field, but are not deflected by the Magnetic Field
3.X-Rays don’t show many properties of light such as Refraction, diffraction, Interference and Polarization
Choose the correct option from the codes given below:
5. Which among the following appear giving different colours mainly due to the phenomenon of interference?

 
  1. A soap bubble
  2. Rainbow
  3. Oil slick on wet road
Select the correct option from the codes given below:
6. Radioactive emission of which of the following particles would change(s) mass number as well as atomic number?

 
  1. Gamma particle
  2. Beta particle
  3. Alpha particle
Select the correct option from the codes given below:
7. The alpha radiation is not used in radiotherapy because:
8. Which among the following cease to exist (or become zero) at Absolute zero temperature on Kelvin scale?
1. Oscillation of the atoms and molecules
2. Entropy
3. Electrical resistance
Choose the correct option from the codes given below:
9. Consider the following statements:
1. A body at rest has no inertia
2. A body in free fall in vacuum has constant acceleration
3. A body in free fall in vacuum has diminishing kinetic energy
Which among the above is / are correct statements?
10. Consider the following statements:
1. A body at rest has no inertia
2. A body in free fall in vacuum has constant acceleration
3. A body in free fall in vacuum has diminishing kinetic energy
Which among the above is / are correct statements?
11. Which of the following is not a valid conservation law of classical Physics?
12. Who among the following discovered X-rays?
13. What is the change in the angular momentum of a system as per the Law of Conservation of Angular momentum, if the total external torque acting is zero?
14. What is the S.I unit of Pressure Energy?
15. Which of the these physical quantities is a vector quantity?
16. The Alkali metals are called good reducing agents. This implies that__:
17. Which among the following elements are generally find in free state?
18. Which among the following gas was leaked at Bhopal during the Bhopal gas tragedy at 2-3 December 1984?
19. Which among the following is major component of Gobar Gas?
20. Which among the following is popularly called Hypo?
21. Who among the following scientists had discovered Radium?
22. Which among the following minerals is also known as Horn Silver?
23. Which among the following impurity in drinking water causes the “Bamboo Spine” disorder?
24. Which of the following is not a metalloid?
25. The patient is instructed to drink which of the following solutions before undergoing radiological examinations?
26. Which of the following increases with increase of highly soluble impurities in water?
  1. Melting point
  2. Boiling point
  3. Surface tension
Select the correct option from codes given below
27. Which of the following is the most active chemically?
28. Which of the following is an alkaline earth metal?
29. Trimethylxanthine is a chemical name of a stimulant which is found in tea and coffee. What is the popular name?
30. Which among following is also known as white gold?
31. Which of the following is an anti-knocking compound that has been phased out in many countries so far?
32. Highest percentage of nitrogen is found in which among the following fertilizers among the given options?
33. The alloy steel containing chromium to resist rusting is known as stainless steel. What is played by Chromium in stainless steel?

 
  1. Chromium does not rust, so it works as protecting cover
  2. Chromium reacts with Iron to make a compound that is not affected by Oxygen
Select the correct option from the codes given below:
34. Many a times, we read in newspapers that detergents are used in making the adulterated milk. Why detergents are used in Milk adulteration ?
35. Consider the following pairs of compounds with their chemical names:

 
  1. Blue vitriol – copper sulphate
  2. White vitriol –  zinc sulphate
  3. Green vitriol –  iron(II) sulphate
Which of the above is/are correct?
36. The patient is instructed to drink which of the following solutions before undergoing radiological examinations?
37. Consider the following statements:

 
  1. Addition of salt to pure water increases the boiling point of water and decreases the freezing point of water
  2. When methyl alcohol is added to water, boiling point of water decreases
Which of the above statements is/are correct?
38. Plasmodium falciparum, which causes malaria in humans is kept in which among the following groups?
39. Which among the following is the most common media of pollination in flowers without petals?
40. Deficiency of Vitamin D causes?
41. Which among the following is the most important role played by Ribosome in the cells?
42. Which among the following is the most common media of pollination in flowers without petals?
43. Which among the following is not present in pure sugar ?
44. The most common use of ‘silicone hydrogels’ is making of which among the following?
45. Fatigue is caused because of formation and depositing of which among the following acids in Muscles?
46. Which among the following diseases is not caused by a virus ?
47. Enterobius vermicularis which affect the caecum and vermiform appendix is commonly called as ?
48. The shape of Vibrio bacteria is ________?
49. The birth of the first child will be a fatal situation in which of the following conditions?
50. Which among the following is not a monosaccharide?
51. Which among the following function as locus of biochemical reactions?
52. Lipoproteins which are the large molecules and which transport the cholesterol in the bloodstream are ______-?
53. Which among the following is not a beverage plant?
54. Which of the following part of the body stores Vitamin A, Vitamin D as well as Vitamin B12?
55. In which of the following era began the Self replicating RNA molecules on Earth ?
56. The correct group of animals that suffer from the “Foot & Mouth ” disease is as follows
57. The natural Pacemaker in the Human Heart is located in the SA node which is present in which among the following chambers?
58. Saffron’ is obtained from which among the following parts of the plant?
59. As per the WHO definition, within how many days of the termination of pregnancy, the death of a woman is counted in the Maternal Mortality?
60. Antipyretic medicines are used for which among the following purposes?
61. “Daps one” immunotherapy is related to which among the following diseases?
62. Which among the following is the edible part in Rice?
63. In human body:

 
  1. Urea is produced in Kidney
  2. Insulin is produced in Pancreas
  3. Gastrin is produced in stomach
Which among the above is / are correct?
64. How the heartwood is different from sapwood in plants?

 
  1. While heartwood performs the function of water-conducting, sapwood provides strength
  2. Heartwood is more susceptible to pests and microbes in comparison to sapwood
Select the correct option from the codes given below:
65. Consider the following statements:

 
  1. Cis and Trans configuration is a feature of saturated fatty acids.
  2. While Trans fats are beneficial and can promote good cholesterol, Cis fats are considered harmful.
Which of the above statements is/are correct?
66. Which among the following is a matching set in taxonomy?
67. Identify the organelle with the help of given information:

 
  1. It is a double membrane organelle.
  2. It is found only in eukaryotic cells.
  3. It is responsible for ATP production.
Select the correct option from codes given below:
68. Consider the following:
1. Sporulation
2. Fission
3. Budding
Which among the above is / are means of asexual reproduction?
69.
  1. Meningitis : Intestines
  2. Typhoid : Lungs
  3. Hepatitis B : Liver
Which of the above is/are correctly matched?
70. Severe Acute Respiratory Syndrome (SARS):

 
  1. is also known as camel flu
  2. outbreak in 2016 was responsible for maximum deaths in Africa
  3. mainly spreads through respiratory secretions or body fluids
Which of the above statements is/are correct?
71. White-nose syndrome (WNS) is an emerging disease among which of the following fauna?
72. A motorboat directed upstream is seen to be at rest from the bank of a river. Which among the following is / are correct statement in this context?
1. In terms of Physics, the engine of the boat is doing work
2. In terms of Physics, the engine of the boat is not doing any work
3. If the engine stops, no work will be done
4. If engine stops, boat will gain kinetic energy
Select the correct option from the codes given below:
73. Which among the following keep changing for a body in uniform circular motion?
1. Speed
2. Amplitude
3. Velocity
4. Acceleration
Choose the correct option from the codes given below:
74. A LED lamp produces 300 lumens of light per watt, which makes it about 20 times as efficient as an incandescent lamp and four times as efficient as the fluorescent tube. What is the reason for this?
75. Which among the following can hear the sound in the frequency range which human cannot hear?

 
  1. Bats
  2. Dogs
  3. Dolphins
Select the correct option from the codes given below:
76. What is the difference between GSLV and PSLV?
1. While PSLV is designed mainly to deliver the earth-observation satellites, GSLV is designed mainly to deliver the communication-satellites
2. While PSLV is a three stage vehicle, GSLV is four stage vehicle
Select the correct option from the codes given below:
77. On which among the following, the speed of the sound depends?

 
  1. Amplitude
  2. Wavelength
  3. Humidity
Select the correct option from the codes given below:
78. Consider the following:

 
  1. Convex lens
  2. Concave lens
  3. Concave mirror
  4. Convex mirror
  5. Plane mirror
Which of the above can form a real image of a real object?
79. Why Air is poor conductor of heat energy?

 
  1. The air molecules are have large mean free paths
  2. There are no free electrons in air
Select the correct option from the codes given below:
80. If a moving body turns its speed to 1.5 times, its kinetic energy __:
81. Which of the following salts has no water of crystallization?
82. Due to which of the following acids, Milk tastes sour when kept in the open for sometime?
83. Which gas is called the “firedamp” in coal mines?
84. Which element is used in the manufacture of safety matches?
85. Which among the following is a crystalline form of Quartz?
86. What kind of fertilizer is Urea?
87.
What is the status of total energy at any time during the interconversion of energy from one form to other forms?

88. What is the name of the new relay satellite series, to be launched by the Indian Space Research Organisation (ISRO)?
89. Which among the following is not a payment card technology?
90. The terms Goodput, Throughput and Maximum throughput are most closely associated with which among the following in computers?
91. What is the use of Digitizer as an input device?
92. What do we call an input/output device on a computer, reserved for communication between the computer operator or maintenance engineer and the computer?
93. Which of the following blogging platform was first launched by Pyra Labs?
94. Which of the following devices comprise the output unit?
95. Which of the following is the first example of an electro mechanical relay computer?
96. Which of the following indicates where is the computer is in terms of the program sequence?
97. Which of the following are characteristics of a gaming computer?
98. Every computer runs an OS software program. What does OS stand for?
99. Monitors, printers, disk drives, keyboard, mouse are included in which of the following categories?
100. Which of the following is the device that is constructed with the series of sensors that detects hand and finger motion?