Multiple Choice Questions for Practice on General Science
1. Ring worm is due to
(A) Virus (B) Protozoa (C) Bacteria (D) Fungus
2. In the structure of Anti-Matter, the Electron is equivalent to
(A) Photon (B) Positron (C) Muon (D) Quark
3. When force is applied on a body, its shape and size change. If, after the removal of the external force, the body regains its original shape and size, it is said to be elastic. On this basis one can say that
(A) Steel is more elastic than rubber
(B) Steel is less elastic than rubber
(C) Both steel and rubber have the same elasticity
(D) Steel is not elastic whereas rubber is elastic
4. The average force necessary to accelerate a proton of rest mass 1.67 x 10-27 kg from rest to one-tenth the speed of light (c = 3.0 x 108 m/s) over a distance of 3.0 cm is
(A) 2.5 x 10-11 N (B) 2.5 x 10-10 N (C) 2.5 x 10-9 N (D) 2.5 x 10-8 N
5. A weight suspended from a spring moves up and down. Its acceleration will be the greatest at
(A) The end points of its travel
(B) Mid-point
(C) One-fourth distance from the upper end
(D) Three-fourths the distance from the upper end
6. The mechanical advantage of a lever will be large if its
(A) Arms on opposite sides of the fulcrum are equal
(B) Arms are unequal, one of them is shorter not being material
(C) Arm on the side of the load is longer than the other arm
(D) Arm on the side of the load is shorter than the other arm
7.
A hydrometer floats upright with its body in water up to the point marked 'W' as shown in the above figure. If the volume of the stem is one-tenth of the total volume of the hydrometer, then the liquid in which it just sinks will have a specific gravity of
(A) 0.1 (B) 0.9 (C) 1.1 (D) 9.0
8. The correct sequence in decreasing order of the root mean square velocities, at a given temperature and pressure, of the given set of gases is
(A) Hydrogen, helium, neon, oxygen
(B) Helium, neon, oxygen, hydrogen
(C) Hydrogen, neon, oxygen, helium
(D) Helium, hydrogen, neon, oxygen
9. Which one of the following substances is used for preservation of food grains ?
(A) Sodium benzoate (B) Vinegar (C) Sodium chloride (D) Potassium permanganate
10. The disease caused by Asbestos is
(A) Emphysema (B) Paralysis (C) Diarrhoea (D) Dysentery
11. Two stars A and B emit maximum radiation at 3500 Angstrom unit and 4500 Angstrom unit respectively. The temperatures of the two stars are in the ratio of
(A) 7 : 9 (B) 9 : 7 (C) 3 : 1 (D) 1 : 3
12. A tuning fork of unknown frequency makes three beats per second with a standard fork of frequency 384 vib/s. The beat frequency decreases when a small piece of wax is put on a prong of the first fork. The frequency of this fork (in vib/s) will be
(A) 381 (B) 384 (C) 387 (D) 390
13. In the wind instruments, sound is produced by the vibrations of the air column. In an open-ended organ pipe,the particle amplitudes are represented as follows :
These correspond respectively to
(A) First, second and third overtones
(B) Fundamental, first and second overtones
(C) Second, third and fourth overtones
(D) Fundamental, second and third overtones
14. A red cross on a white background is illuminated with white light and is observed through a blue filter. It will be seen as a
(A) Blue cross on a black background
(B) Red cross on a blue background
(C) Blue cross on a red background
(D) Black cross on a dark back-ground
15. A reflecting spherical mirror does not suffer from
(A) Chromatic aberration (B) Spherical aberration (C) Coma (D) Astigmatism
16. The instrument 'Mariner's compassis' is used for
(A) Detection of direction by sailors
(B) sighting distant objects
(C) sighting objects on the surface by an observer in a trench or submarine
(D) seeing small objects or particles
17. The instrument 'Telescope' is used for
(A) Detection of direction by sailors
(B) sighting distant objects
(C) sighting objects on the surface by an observer in a trench or submarine
(D) seeing small objects or particles
18. The instrument 'Periscope' is used for
(A) Detection of direction by sailors
(B) sighting distant objects
(C) sighting objects on the surface by an observer in a trench or submarine
(D) seeing small objects or particles
19. The instrument 'Microscope' is used for
(A) Detection of direction by sailors
(B) sighting distant objects
(C) sighting objects on the surface by an observer in a trench or submarine
(D) seeing small objects or particles
20. Consider the following statements :
Assertion (A) : The convex lens in the eye produces an inverted image on the retina of the eye, but we see all objects as erect
Reason (R) : The image on the retina is correctly interpreted by the brain.
Of these statements
(A) Both A and R are true and R is the correct explanation of A
(B) Both A and R are true but R is not a correct explanation of A
(C) A is true but R is false
(D) A is false but R is true
21. Consider the following statements :
A given material shows magnetism because of
1. The motion of electrons in orbit around the nucleus.
2. The rotational motion of electrons about their own axes.
3. Vibrations of atoms about their mean positions.
4. Occurrence of the material in nature in this form.
Which of these statements is/are correct ?
(A) 4 alone (B) 1, 2, 3 and 4 (C) 1, 2 and 4 (D) 1, 2 and 3
22.
In the circuit shown in the above figure, (A and B are ammeters), the current through A and B will be respectively
(A) 2A and 1A (B) 1A and 2A (C) 1A and 1A (D) 2A and 2A
23.
A rectanglar loop carrying a current of 'i' amperes is situated near a long straight wire such that the wire is parallel to one of the sides of the loop and is in the plane of the loop. If a steady current I is established in the wire as shown in the above figure, the loop will
(A) Rotate about an axis parallel to the wire
(B) Move away from the wire
(C) Move towards the wire
(D) Remain stationary
24. Consider the following statements :
Power is transmitted from a power house on high voltage A.C. as
1. Power cannot be generated at low voltage.
2. A precaution against theft of transmission lines.
3. It is more economical due to smaller power losses.
4. High voltage gives minor shocks.
Which of these statements is / are correct ?
(A) 1, 2, 3 and 4 (B) 2 and 3 (C) 3 alone (D) 1, 2 and 4
25. Consider the following statements :
Assertion (A) : Diamond and graphite represent two different forms of crystallised carbon. Graphite is very soft whereas diamond is extremely hard.
Reason (R) : In the diamond crystal, the atoms are packed very tighty together. In graphite, the atoms are bound together very tightly into thin monoatomic sheets piled quite loosely one on top of another.
Of these statements :
(A) Both A and R are true and R is the correct explanation of A
(B) Both A and R are true but R is not a correct explanation of A
(C) A is true but R is false
(D) A is false but R is true
26. Which one of the following statements is true of all chemical reactions ?
(A) There is always a change in volume
(B) Heat is generally evolved
(C) All chemical changes are accompanied by change in mass
(D) Chemical bonds are broken and / or formed
27. Which one of the following is an ore of lead (Pb) ?
(A) Pyrolusite (B) Ilmenite (C) Kimberlite (D) Galena
28. Which one of the following pairs of elements and their symbols is not correctly matched ?
(A) Europium —— Eu
(B) Gadolinium —— Gd
(C) Palladium —— Pd
(D) Rhenium —— Rh
29. Consider the following statements:
Assertion (A) : Water exists in three forms - solid, liquid and vapour.
Reason (R) : These three forms are actually allotropic modifications which differ in bonding characteristics.
Of these statements
(A) Both A and R are true and R is the correct explanation of A
(B) Both A and R are true but R is not a correct explanation of A
(C) A is true but R is false
(D) A is false but R is true
30. Water gas is obtained when steam is passed over
(A) Red hot iron (B) Heated iron oxide (C) Red hot coke (D) Red hot copper
31. Consider the following statements :
Assertion (A) : Hydrogen exists in two isotopic forms, one being the ortho hydrogen and the other the para hydrogen.
Reason (R) : Orientations of nuclear spins are different in ortho and para hydrogen.
Of these statements
(A) Both A and R are true and R is the correct explanation of A
(B) Both A and R are true but R is not a correct explanation of A
(C) A is true but R is false
(D) A is false but R is true
32. Consider the following statements :
Assertion (A) : Gaseous hydrogen does not decolourise acidified KMnO4 solution whereas a mixture of Zn and dilute H2SO4 does.
Reason (R) : The mixture of zinc and sulphuric acid contains molecular hydrogen.
Of these statements
(A) Both A and R are true and R is the correct explanation of A
(B) Both A and R are true but R is not a correct explanation of A
(C) A is true but R is false
(D) A is false but R is true
33. Which one of the following sets of carbonates would yield CO2 on heating ?
(A) Na2CO3, CaCO3, MgCO3
(B) CaCO3, MgCO3, PbCO3
(C) CaCO3, Na2CO3, ZnCO3
(D) Na2CO3, PbCO3, ZnCO3
34. Consider the following compounds :
1. MnO2 2. MnCL2 3. K2MnO4 4. KMnO4
The correct sequence of the increasing order of valency of Mn in these compounds is
(A) 2, 1, 3, 4 (B) 2, 3, 4, 1 (C) 1, 2, 3, 4 (D) 3, 2, 1, 4
35. In the reaction Mg + 2HCl → MgCl2 + H2, the oxidation state of Mg changes from
(A) Zero to +2 (B) +2 to zero (C) Zero to +1 (D) +2 to +1
36. The pH at the equivalence point of a titration involving a weak acid and a strong base is always
(A) Less than 7 (B) Greater than 7 (C) 7 (D) Zero
37. Consider the following statements :
Assertion (A) : Nitrogen compounds are necessary for plant growth.
Reason (R) : Nitrogen absorbs sun's light energy and converts it into chemical energy to make plant growth possible.
Of these statements
(A) Both A and R are true and R is the correct explanation of A
(B) Both A and R are true but R is not a correct explanation of A
(C) A is true but R is false
(D) A is false but R is true
38. If the quantum number l had a value of two, then the number of permitted values of the quantum number m would be
(A) 2 (B) 4 (C) 5 (D) 7
39. If 100 ml of a gas weighs 0.120 gram at STP, then its molecular weight will be approximately
(A) 0.27 (B) 2.70 (C) 27.0 (D) 270.0
40. All the metabolic reactions in the organisms are catalysed by
(A) Vitamins (B) Hormones (C) Enzymes (D) Minerals
41. Consider the following pairs :
1. Polyribosomes —— protein synthesis
2. Golgi body —— formation of secretory vesicle
3. Mitochondria —— respiration
4. Endoplasmic reticulum —— formation of spindle fibres
Which of these pairs is correctly matched ?
(A) 2, 3 and 4 (B) 1, 3 and 4 (C) 1, 2 and 4 (D) 1, 2 and 3
42. Fluorine deficiency in human beings leads to
(A) Dental caries (B) Fluorosis (C) Fibrosis (D) Follicular necrosis
43. If a patient has blood group AB and needs blood transfusion, he
(A) Should be given blood of AB group only
(B) Should be given blood of 'O' group only
(C) Can be given blood of A or B group
(D) Can be given blood of AB or 'O' or A or B group
44. Night blindness can be corrected by the intake of
(A) Vitamin B Complex (B) Vitamin A (C) Vitamin E (D) Vitamin K
45. The "survival of the fittest" in the "struggle for existence" proposed by Darwin in his theory of Natural Selection means that
(A) Physically stronger organisms survive at the expense of weaker ones
(B) Numerically strong species have better chances of survival
(C) Organisms that are better adapted to the environment have more survival value
(D) Predators survive while the prey perish
46. Consider the following statements:
Assertion (A) : Diphtheria, poliomyelitis and tuberculosis are still major diseases of children in India.
Reason (R) : DPT vaccine given to prevent these diseases is not effective.
Of these statements
(A) Both A and R are true and R is the correct explanation of A
(B) Both A and R are true but R is not a correct explanation of A
(C) A is true but R is false
(D) A is false but R is true
47. Ginger is an example of
(A) Tuber (B) Rhizome (C) Bulb (D) Corm
48. Which of the following is not a computer language ?
(A) Windows 10 (B) PASCAL (C) FORTRAN (D) C++
49. Nobel Prize in Physics was awarded for 'Discovery of X-rays' to
(A) Chadwick (B) Anderson (C) Roentgen (D) Marconi
50. Nobel Prize in Physics was awarded for 'Discovery of Neutron' to
(A) Chadwick (B) Anderson (C) Roentgen (D) Marconi
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