General Science Questions (MCQs) for Competitive Examinations
General Science Multiple choice questions for GK paper in SSC, NDA, CDS, UPSC, UPPSC and State PSC Examinations. These questions are part of GKToday’s 35000+ MCQs Bank Course in GKToday Android App
1. Normal Human blood pressure is
[A] 110/110
[B] 120/70
[C] 120/80
[D] 140/60
Show Answer
Correct Answer: C [120/80]
Notes:
Blood Pressure is expressed in two numbers. The higher number is known as Systolic Pressure, or the amount of force (as measured in millimetres of mercury) that is exerted against the artery walls during a heartbeat (contraction). The lower number in the Diastolic pressure, which does the force exist while the heart is resting between beats.
2. Enterobius vermicularis which affect the caecum and vermiform appendix is commonly called as ?
[A] Tapeworm
[B] Pinworm
[C] Threadworm
[D] Ringworm
Show Answer
Correct Answer: B [Pinworm]
Notes:
Enterobius vermicularis which affect the caecum and vermiform appendix is commonly called as Pinworm. Pinworms are tiny, narrow worms and are white in color and less than a half-inch long.
3. Efforts of which of the following scientists led the government of India to set up Centre for DNA Fingerprinting and Diagnostics?
[A] Dr Lalji Singh
[B] Samir K Brahmachari
[C] Prof M Vijayan
[D] Kanury Venkata Subba Rao
Show Answer
Correct Answer: A [Dr Lalji Singh]
Notes:
Director of the Centre for Cellular and Molecular Biology (CCMB) since 1998, Singh is best known for developing a unique way of DNA fingerprinting that has been accepted by Indian courts as valid in forensic evidence, paternity determination and seed stock verification. This technique was used during the probe into the Rajiv Gandhi murder case. This new technique prompted the government to set up the Centre for DNA Fingerprinting and Diagnostics for further exploration in the field.
4. Who among the following is best known for his discovery and development of the first safe and effective polio vaccine.?
[A] Jonas Salk
[B] David Bodian
[C] Almroth Wright
[D] Albert Sabin
Show Answer
Correct Answer: A [Jonas Salk]
Notes:
Jonas Edward Salk was an American virologist and medical researcher who developed one of the first successful polio vaccines. He announced on a national radio show that he has successfully tested a vaccine against polio.
5. Which among the following is NOT a true bast fiber?
[A] Jute
[B] Hemp
[C] Flax
[D] Cotton
Show Answer
Correct Answer: D [Cotton]
Notes:
Please note that Bast Fibers are obtained from Phloem
6. Which of the following is correct about Kinetic energy during the projectile motion?
[A] it is minimum at the point of projection
[B] it is minimum at the highest point
[C] it is maximum at the highest point
[D] it is minimum at the point of reaching the ground
Show Answer
Correct Answer: B [it is minimum at the highest point]
Notes:
The Kinetic energy of an object is maximum at the point of projection or at the point of reaching the ground. It is minimum at the highest point.
7. What is the upward force experienced by a body, when it is immersed in a fluid, known as?
[A] Tangential force
[B] Buoyant force
[C] Centrifugal force
[D] Hydraulic force
Show Answer
Correct Answer: B [Buoyant force]
Notes:
When a body is immersed in a fluid (liquid or gas) it exerts an upward force on that body. This upward force is called up thrust or buoyant force, The whole phenomenon is called as buoyancy.
8. What is the relationship between mass and time period of a spring pendulum?
[A] T∝ 1/√m
[B] T ∝ √m
[C] T ∝ m
[D] √T ∝ m
Show Answer
Correct Answer: B [T ∝ √m]
Notes:
Time period of a spring pendulum depends on the mass suspended as T∝ √m i.e. greater the mass greater will be the inertia and so lesser will be the frequency of oscillation and greater will be the time period.
9. In which of the following the sound cannot travel?
[A] Solids
[B] Liquids
[C] Gases
[D] Vacuum
Show Answer
Correct Answer: D [Vacuum]
Notes:
Sound cannot travel in vacuum. Sound is a mechanical wave and needs a material medium like air, water, steel etc. for its propagation.
10. In which of the following mediums will sound travel with greater speed at 0° C?
[A] Aluminium
[B] Water
[C] Hydrogen
[D] Same in all of the above
Show Answer
Correct Answer: A [Aluminium]
Notes:
The speed of sound decreases when we go from solid to gaseous state.
