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MCQOPTIONS
This section includes 1777 Mcqs, each offering curated multiple-choice questions to sharpen your 9th Class knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Toning fork for A has frequency 1% greater than that of standard fork B while tuning fork C has frequency 2% smaller than that of B. When A and B are sounded together, then number of beats heard per second is 5. The frequency of tuning fork C is approximately |
| A. | 93 Hz |
| B. | 163 Hz |
| C. | 233 Hz |
| D. | 283 Hz |
| Answer» C. 233 Hz | |
| 102. |
A particle of mass 4 m which is at rest and explodes into three fragments. Two of the fragments each of mass \[m\] are found to move with a speed \[\upsilon \] in mutually perpendicular directions. The total energy released in the explosion is |
| A. | \[\text{2m}{{\upsilon }^{\text{2}}}\] |
| B. | \[\frac{1}{2}\text{ m}{{\upsilon }^{\text{2}}}\] |
| C. | \[\text{m}{{\upsilon }^{\text{2}}}\] |
| D. | \[\frac{3}{2}\text{m}{{\upsilon }^{\text{2}}}\] |
| Answer» E. | |
| 103. |
The wave produced inside the water is |
| A. | only longitudinal |
| B. | only transverse |
| C. | both (a) and (b) |
| D. | none of these |
| Answer» B. only transverse | |
| 104. |
Which of the following tissues supports internal organs and helps in the repairing of tissues? |
| A. | P |
| B. | Q |
| C. | R |
| D. | S |
| Answer» C. R | |
| 105. |
A lorry and a car moving with the same kinetic energy are brought to rest by application of brakes which |
| A. | Lorry |
| B. | Car |
| C. | Both |
| D. | None |
| Answer» D. None | |
| 106. |
What is the maximum number of electrons that can be accommodated in the 4th energy level? |
| A. | \[32\] |
| B. | \[18\] |
| C. | \[2\] |
| D. | \[8\] |
| Answer» B. \[18\] | |
| 107. |
Read the given statements and select the correct option. Statement 1: A man carrying a bucket of water and walking on a rough level road with a uniform velocity does no work while carrying the bucket. Statement 2 : The work done on a body by a force (F) in giving it a displacement (S) is defined as \[W=\overline{F}\cdot \overline{S}=FS\,\,\,\cos \theta \], where \[\theta \] is the angle between vectors \[\overline{F}\] and\[\overline{S}\]. |
| A. | Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. |
| B. | Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. |
| C. | Statement 1 is true but statement 2 is false. |
| D. | Both statements 1 and 2 are false. |
| Answer» C. Statement 1 is true but statement 2 is false. | |
| 108. |
Coolie A takes 1 min to raise a box of mass m through a height of 2.0 m. Another coolie 6 takes 30 s for the same job. Which one has greater power? |
| A. | Coolie A |
| B. | Coolie B |
| C. | Both have the same power |
| D. | Cannot say |
| Answer» C. Both have the same power | |
| 109. |
Find the acceleration due to gravity at a height of 3200 km above the surface of earth. |
| A. | \[4.36\,\,m/{{s}^{2}}\] |
| B. | \[3.56\,\,m/{{s}^{2}}\] |
| C. | \[2.45\,\,m/{{s}^{2}}\] |
| D. | \[6.25\,\,m/{{s}^{2}}\] |
| E. | None of these |
| Answer» B. \[3.56\,\,m/{{s}^{2}}\] | |
| 110. |
The lowest part of the transverse wave below the line of zero disturbance is the |
| A. | compression |
| B. | crest |
| C. | trough |
| D. | rarefaction |
| Answer» D. rarefaction | |
| 111. |
The basic unit of classification is called: |
| A. | Class |
| B. | Order |
| C. | Species |
| D. | Phyllum |
| E. | None of these |
| Answer» D. Phyllum | |
| 112. |
The heart of a man pumps 4000 c.c. of blood through the arteries/per minute at a pressure of 130 mm Hg. If the density of mercury is\[13.6\times {{10}^{3}}\,kg/{{m}^{3}}\], what is the power of heart? |
| A. | \[1.15\] watt |
| B. | \[2.30\]watt |
| C. | \[1.15\] H.P |
| D. | \[0.115\] H.P |
| Answer» B. \[2.30\]watt | |
| 113. |
Select the intrinsic disease causing factor among the following. |
| A. | Microorganisms |
| B. | Environmental pollutants |
| C. | Abnormal hormone secretion |
| D. | Inadequate diet |
| Answer» D. Inadequate diet | |
| 114. |
Acute diseases ______. |
| A. | Have long term bad effects on health |
| B. | Include typhoid, cholera, diabetes, etc. |
| C. | Can be cured only by surgeries |
| D. | Include cold, cough, flu, etc. |
| Answer» E. | |
| 115. |
Which one of the following has irregular and variable shapes? |
| A. | Algae |
| B. | Ameoba |
| C. | Paramecium |
| D. | Euglena |
| E. | None of these |
| Answer» C. Paramecium | |
| 116. |
Which of the following is NOT a measure of energy? |
| A. | \[J\,\,s\] |
| B. | \[W\,\,s\] |
| C. | \[kWh\] |
| D. | \[erg\] |
| Answer» B. \[W\,\,s\] | |
| 117. |
A boy stands facing a high wall at a distance of \[85\,\,m\] from it and then blows a whistle. Calculate the time interval when he hears an echo. (Speed of sound\[=340\,\,m\,\,{{s}^{-1}}\]). |
| A. | \[1\,\,s\] |
| B. | \[2\,\,s\] |
| C. | \[0.5\,\,s\] |
| D. | \[3\,\,s\] |
| Answer» D. \[3\,\,s\] | |
| 118. |
A boy moved a body through 3 m in four different ways. In which of the following cases was the work done the maximum? |
| A. | Pushing a body over an inclined plane |
| B. | Lifting a body vertically upwards |
| C. | Pushing a body over smooth rollers |
| D. | Pushing on a plane horizontal surface |
| Answer» C. Pushing a body over smooth rollers | |
| 119. |
If the density of air at a point through which a sound wave is passing is maximum at an instant, what will be the pressure at that point? |
| A. | Minimum |
| B. | Equal to the density of air |
| C. | Equal to the atmospheric pressure |
| D. | Maximum |
| Answer» E. | |
| 120. |
Designation of an orbital with n = 6 and\[l=4\], is |
| A. | 6s |
| B. | \[6d\] |
| C. | \[6f\] |
| D. | \[6p\] |
| Answer» E. | |
| 121. |
Introducing dead or weakened germs in the body of living being for developing immunity for a specific disease is called: |
| A. | Pathogenicity |
| B. | Immunization |
| C. | Antibiotic |
| D. | Antigen - antibody complex |
| E. | None of these |
| Answer» C. Antibiotic | |
| 122. |
An iron sphere of mass \[10\text{ }kg\]has the same diametre as an aluminium sphere of mass is\[3.5\,kg\]. Both spheres are dropped simultaneously from a tower. When they are 10 m above the ground, they have the same: |
| A. | Acceleration |
| B. | Momenta |
| C. | Potential energy |
| D. | Kinetic energy |
| E. | None of these |
| Answer» B. Momenta | |
| 123. |
The diseases which are present since birth are: |
| A. | Communicable diseases |
| B. | Deficiency diseases |
| C. | Congenital diseases |
| D. | Allergies |
| E. | None of these |
| Answer» D. Allergies | |
| 124. |
What does an atom and an ion of the isotope of sodium \[_{11}^{22}Na\] both contain? |
| A. | \[11\] electrons |
| B. | \[12\] neutrons |
| C. | \[23\] protons |
| D. | \[23\] neutrons |
| Answer» C. \[23\] protons | |
| 125. |
The power of a pump motor is 2 kilowatt. The water raised by the pump per minute to a height of 10 m is nearly |
| A. | 500kg |
| B. | 7000kg |
| C. | 1200kg |
| D. | zero |
| Answer» D. zero | |
| 126. |
The separation between two successive crests in a wave is |
| A. | \[\lambda \] |
| B. | \[\lambda /2\] |
| C. | \[2\lambda \] |
| D. | \[\lambda /4\] |
| Answer» B. \[\lambda /2\] | |
| 127. |
Two bodies of masses 1 m and 4 m have the same K.E. What is the ratio for their momenta. |
| A. | 2 : 1 |
| B. | 1 : 2 |
| C. | 1 : 4 |
| D. | 4 : 1 |
| Answer» C. 1 : 4 | |
| 128. |
Regular periodic vibrations produce |
| A. | musical sound |
| B. | noice |
| C. | both (a) and (b) |
| D. | None of these |
| Answer» B. noice | |
| 129. |
The energy required to raise a given volume of water from a well can be |
| A. | mega watts |
| B. | mega newton |
| C. | mega joules |
| D. | kilowatts |
| Answer» D. kilowatts | |
| 130. |
Diarrhoea is a: |
| A. | Bacterial disease |
| B. | Viral disease |
| C. | Protozoan disease |
| D. | Fungal disease |
| E. | None of these |
| Answer» D. Fungal disease | |
| 131. |
A mass M is attached to a massless spring of spring constant K. The mass is moved through a distance \[X\] and released. The maximum velocity of the mass is |
| A. | \[\frac{2\pi M}{K}\] |
| B. | \[\frac{K}{Mx}\,\frac{\sqrt{K}}{M}\] |
| C. | \[\frac{\sqrt{K}}{M}\] |
| D. | \[\frac{\sqrt{K}}{Mx}\] |
| Answer» C. \[\frac{\sqrt{K}}{M}\] | |
| 132. |
Match column I with column II and select the correct option from the given codes.Column I (Nutrients)Column II (Deficiency diseases)(a) Niacin(i) Scurvy(b) Vitamin C(ii) Kwashiorkor(c) Vitamin K(iii) Xerophthalmia(d) Protein(iv) Pellagra(e) Vitamin A(v) Bleeding |
| A. | (a) - (i), (b) - (ii), (c) - (iv), (d) - (v), (e) - (iii) |
| B. | (a) - (iv), (b) - (i), (c) - (v), (d) - (ii), (e) - (iii) |
| C. | (a) - (i), (b) - (iii), (c) - (v), (d) - (iv), (e) - (ii) |
| D. | (a) - (iv), (b) - (v), (c) - (iii), (d) - (ii), (e) - (i) |
| Answer» C. (a) - (i), (b) - (iii), (c) - (v), (d) - (iv), (e) - (ii) | |
| 133. |
Which of the following statements is correct regarding chronic diseases? |
| A. | They last for a long time, may be as much as a life time. |
| B. | A person suffering from a chronic disease always recovers completely after treatment. |
| C. | They do not cause long term bad effects on human health. |
| D. | These include Alzheimer's disease, cholera, arthritis, cancer, etc. |
| Answer» B. A person suffering from a chronic disease always recovers completely after treatment. | |
| 134. |
Read the given statements and select the correct option.Statement 1: The exaggerated response of the immune system to certain antigens present in the environment is called as allergy.Statement 2: The allergic tendency may genetically passed from the parents to the children and is characterised by the presence of large quantities of IgE antibodies in the blood. |
| A. | Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. |
| B. | Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. |
| C. | Statement 1 is true but statement 2 is false. |
| D. | Both statements 1 and 2 are false. |
| Answer» C. Statement 1 is true but statement 2 is false. | |
| 135. |
A beam of alpha-particles is fired at a piece of gold foil as shown below. After striking the gold foil, in which direction do most of the alpha-particles travel? |
| A. | \[P\] |
| B. | \[Q\] |
| C. | \[R\] |
| D. | \[S\] |
| Answer» B. \[Q\] | |
| 136. |
A bullet is fired at a target with a velocity 80 m/s and penetrates 50 cm into it. If this bullet were fired into a target 25 cm thick with equal velocity, with what velocity would it emerge, supposing the resistance to be uniform and the same in both the cases? |
| A. | \[\sqrt{80}m/s\] |
| B. | \[\frac{40}{\sqrt{2}}m/s\] |
| C. | \[40m/s\] |
| D. | \[40\sqrt{2}m/s\] |
| Answer» E. | |
| 137. |
The frequency of a wave travelling at a speed of 500 ms1 is 25 Hz. Its time period will be ____. |
| A. | 0.04 s |
| B. | 0.05 s |
| C. | 0.02 s |
| D. | 0.01 s |
| E. | None of these |
| Answer» B. 0.05 s | |
| 138. |
If the frequency of a wave is doubled, then its wavelength |
| A. | becomes doubled |
| B. | remains same |
| C. | becomes half of the original |
| D. | none of these |
| Answer» D. none of these | |
| 139. |
Using the sonar, sound pulses are emitted at the surface, the pulses after being reflected from the bottom are detected, if the time interval from the emission to the detection of the sound pulses is 2 seconds, find the depth of the water. (Taking velocity of sound through water = 1531 m/s) |
| A. | 1500 m |
| B. | 1000 m |
| C. | 1531 m |
| D. | 1530 m |
| Answer» D. 1530 m | |
| 140. |
An elevator is designed to lift a load of 1000 kg through 6 floors of a building averaging 3.5 m per floor in 6 s. The power of the engine of the elevator neglecting the other losses is given by |
| A. | 20 kW |
| B. | 13.6 kW |
| C. | 40.5 kW |
| D. | 34.3 kW |
| Answer» E. | |
| 141. |
Which one is the ultimate source of energy in our ecosystem? |
| A. | Plants |
| B. | Power plants |
| C. | Sun |
| D. | Fossil Fuel |
| E. | None of these |
| Answer» D. Fossil Fuel | |
| 142. |
Electron promotion rule is related to |
| A. | \[2s\to 2p\] |
| B. | \[2s\to 3s\] |
| C. | \[2s\to 3p\] |
| D. | \[1s\to 2s\] |
| Answer» B. \[2s\to 3s\] | |
| 143. |
Which of the following contains both living and dead cells conducting tissue that provides mechanical strength in plants? |
| A. | Meristem |
| B. | Phloem |
| C. | Xylem |
| D. | Collenchyma |
| Answer» D. Collenchyma | |
| 144. |
Hydrogen exists in three isotopic forms, \[_{\text{1}}^{\text{1}}\text{H,}\,\,_{\text{1}}^{\text{2}}\text{H,}\,\,_{\text{1}}^{\text{3}}\text{H}\] respectively known as protium, deuterium and tritium. Why are all the isotopes neutral in nature? |
| A. | Since neutrons are neutral in nature hence, isotopes are electrically neutral. |
| B. | All the isotopes have one electron and one proton, hence they are neutral. |
| C. | All the isotopes have one proton and one neutron, hence they are neutral. |
| D. | Increasing number of protons in the isotopes make them neutral. |
| Answer» C. All the isotopes have one proton and one neutron, hence they are neutral. | |
| 145. |
Which of the following is the causative agent of tuberculosis? |
| A. | Streptococcus |
| B. | Pneumococcus |
| C. | Mycobacterium |
| D. | Salmonella |
| E. | None of these |
| Answer» D. Salmonella | |
| 146. |
Which of the following is AIDS virus? |
| A. | Single strand DNA |
| B. | Double strand DNA |
| C. | Double strand RNA |
| D. | Single strand RNA |
| E. | None of these |
| Answer» E. None of these | |
| 147. |
The space between proton and electron in hydrogen atom is |
| A. | absolutely empty |
| B. | full of electromagnetic radiation |
| C. | full of air |
| D. | full of ether |
| Answer» B. full of electromagnetic radiation | |
| 148. |
If the wavelength of a sound of frequency \[350\,\,Hz\] is\[0.5\,\,m\]. Find the velocity of sound. |
| A. | \[700\,\,m\,\,{{s}^{-1}}\] |
| B. | \[175\,\,m\,\,{{s}^{-1}}\] |
| C. | \[17.5\,\,m\,\,{{s}^{-1}}\] |
| D. | \[70\,\,m\,\,{{s}^{-1}}\] |
| Answer» C. \[17.5\,\,m\,\,{{s}^{-1}}\] | |
| 149. |
Which of the following diseases is spread through sexual contact? |
| A. | Tetanus |
| B. | Tuberculosis |
| C. | Malaria |
| D. | AIDS |
| E. | None of these |
| Answer» E. None of these | |
| 150. |
Which one of the following is not a viral disease? |
| A. | Dengue |
| B. | AIDS |
| C. | Typhoid |
| D. | Influenza |
| E. | None of these |
| Answer» D. Influenza | |