PSC GS QB Part 13
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- 301. Which of these elements belong to the halogen family?
- A) Fluorine
B) Iron
C) Potassium
D) Oxygen - Answer
- Correct Option : A
- Explanation
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- 302. The property of light which is made use in optical fibres is
- A) Scattering
B) total internal reflection
C) refraction
D) diffraction - Answer
- Correct Option : B
- Explanation
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- 303. Which of these electro magnetic waves is made use in taking photographs of distant objects?
- A) X- Rays
B) Radio waves
C) Infrared
D) Microwaves - Answer
- Correct Option : C
- Explanation
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- 304. Atoms having the same number of neutrons are called?
- A) Isobar
B) Isotope
C) Isotone
D) Isomer - Answer
- Correct Option : C
- Explanation
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- 305. Which of the following glands secretes the hormone melatonin?
- A) Adrenal
B) Pineal
C) Hypothalamus
D) Pituitary - Answer
- Correct Option : B
- Explanation
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- 306. Which of the following body parts is affected by filariasis?
- A) Joints
B) Lymph nodes
C) Bones
D) None of these - Answer
- Correct Option : B
- Explanation
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- 307. A group of specific proteins produced by mammals to defend themselves from foreign organisms or chemicals are called?
- A) Antigen
B) Antibody
C) Hormones
D) Enzymes - Answer
- Correct Option : B
- Explanation
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- 308. Most of the light rays inside a tube light is in the form of
- A) Visible light
B) Infrared light
C) Bright light
D) Ultraviolet light - Answer
- Correct Option : D
- Explanation
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- 309. Which disease is caused by the disintegration of motor neurons in the brain?
- A) Addison’s disease
B) Acromegaly
C) Parkinson’s disease
D) Cushing’s Syndrome - Answer
- Correct Option : C
- Explanation
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- 310. Which of the following is not associated with the process of blood clotting?
- A) Fibrinogen
B) Calcium
C) Vitamin K
D) Haemoglobin - Answer
- Correct Option : D
- Explanation
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- 311. Who introduced the term ‘Gene’ for the hereditary factors?
- A) Wilhelm Johannsen
B) Grigor Mendel
C) Alice Jeffrey
D) Har Govind Khorana - Answer
- Correct Option : A
- Explanation
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- 312. By which name are 16th group elements known?
- A) Carbon family
B) Nitrogen family
C) Oxygen family
D) Halogen family - Answer
- Correct Option : C
- Explanation
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- 313. Who introduced the Plum pudding model of atom?
- A) J.J.Thomson
B) John Dalton
C) Niels Bohr
D) Ernest Rutherford - Answer
- Correct Option : A
- Explanation
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- 314. In which year did Max Plank get Nobel prize for quantum theory of light?
- A) 1916
B) 1905
C) 1918
D) 1917 - Answer
- Correct Option : C
- Explanation
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- 315. If the velocity of a moving object is doubled its kinetic energy will be:
- A) Doubled
B) Tripled
C) Halved
D) Four times - Answer
- Correct Option : D
- Explanation
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- 316. The ultimate cause of water movement in a plant stem against gravity is?
- A) Osmosis
B) transpiration
C) photosynthesis
D) diffusion - Answer
- Correct Option : B
- Explanation
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- 317. Which one of the following is the unit of activity of a radioactive source?
- A) Lux
B) Becquerel
C) Tesla
D) Siemens - Answer
- Correct Option : B
- Explanation
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- 318. Glass is a _________
- A) Vitrified liquid
B) crystalline mateiral
C) semi-solid
D) sublimation of iodine - Answer
- Correct Option : A
- Explanation
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- 319. The term ‘light year’ is a unit employed in measuring
- A) intensity of light
B) distance
C) speed of light
D) time - Answer
- Correct Option : B
- Explanation
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- 320. Which is not an alkali metal.
- A) Sodium
B) Potassium
C) Caesium
D) Gallium - Answer
- Correct Option : D
- Explanation
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- 321. The organic acid present in tomato
- A) Oxalic acid
B) Acetic acid
C) Lactic acid
D) Citric acid - Answer
- Correct Option : A
- Explanation
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- 322. The central control of respiratory activity in human body is exercised by
- A) Cerebrum
B) Cerebellum
C) Medulla Oblongata
D) Hypothalamus - Answer
- Correct Option : C
- Explanation
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- 323. Which of the following branch of science deals with the study of human race?
- A) Ethology
B) Ecology
C) Anthropology
D) Ichthyology - Answer
- Correct Option : C
- Explanation
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- 324. Which of the following is not an ore of iron?
- A) Hematite
B) Magnetite
C) Limonite
D) Dolomite - Answer
- Correct Option : D
- Explanation
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- 325. Which of the following is used as an anti-coagulant in blood banks?
- A) Sodium citrate
B) Sodium benzoate
C) Silver bromide
D) Silver iodide - Answer
- Correct Option : A
- Explanation
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