Q: Which one is a water soluble vitamin?

A: Vitamin A

B: Vitamin C

C: Vitamin K

D: Vitamin D



Correct Option: B  [ Vitamin C ]

Remark:

Explanation: Vitamins are classified into two categories based on their solubility — fat-soluble and water-soluble. Vitamin C (ascorbic acid) and the B-complex vitamins are water-soluble, meaning they dissolve in water and are not stored in the body. Therefore, they must be consumed regularly through diet. Deficiency of Vitamin C causes scurvy, characterized by bleeding gums and delayed wound healing.


Q: Normal human blood is:

A: Acidic

B: Alkaline

C: Neutral

D: Variable



Correct Option: B  [ Alkaline ]

Remark:

Explanation: Normal human blood has a slightly alkaline pH of 7.35 to 7.45. This pH is maintained by buffer systems such as the bicarbonate buffer system and controlled by the lungs (CO₂ regulation) and kidneys (acid-base balance). A deviation from this range can be life-threatening — acidosis occurs if pH falls below 7.35, and alkalosis occurs if it rises above 7.45.


Q: Pure gold is of

A: 24 Carat

B: 18 Carat

C: 22 Carat

D: None of these



Correct Option: A  [ 24 Carat ]

Remark:
A "carat" is a unit of measurement used to express the weight of gemstones, particularly diamonds and gold etc.


Q: What is the purpose of 'Anemometer'?

A: To measure blood pressure.

B: To measure the velocity and to find the direction of wind.

C: To measure altitude.

D: none of these.



Correct Option: B  [ To measure the velocity and to find the direction of wind. ]

Remark:

Explanation: An anemometer is a meteorological instrument used to measure wind speed and direction. It is an essential tool in weather stations, aviation, and marine forecasting.

Working Principle: The cup anemometer has three or four cups that rotate with the wind. The rotation speed is proportional to wind velocity. Advanced types also detect wind direction.

Types of Anemometers:

  • Cup: Measures wind speed using rotating cups.
  • Vane: Measures both speed and direction.
  • Hot-wire: Uses heat loss to measure air flow.
  • Ultrasonic: Uses sound waves for precise measurement.


Q: Magnetic effect of current gives rise to which force ?

A: mechanical

B: frictional

C: spring

D: gravitational



Correct Option: A  [ mechanical ]

Remark:

The magnetic effect of current gives rise to a mechanical force. When an electric current passes through a conductor placed in a magnetic field, it experiences a force that can cause motion — this is known as the motor effect. This principle is used in devices like electric motors, galvanometers, and loudspeakers.

  • Frictional force: Arises due to contact between surfaces.
  • Spring force: Related to elasticity.
  • Gravitational force: Due to attraction between masses, unrelated to current.


Q: Which of the following pair is incorrect ?

A: Roentgen : X-ray

B: Newton : Law of Gravitation

C: Faraday : Diffusion of gases

D: Pasteur : Bacteriology



Correct Option: C  [ Faraday : Diffusion of gases ]

Remark:

Explanation: The pair Faraday : Diffusion of gases is incorrect. The law of diffusion of gases was given by Thomas Graham, not Michael Faraday. Faraday is known for his work on electromagnetism and electrolysis. The other pairs are correctly matched.


Q: Which among the following is a large spectrum Antibiotic ?

A: Paracetamol

B: Penicillin

C: Ampicillin

D: chloramphenicol



Correct Option: C  [ Ampicillin ]

Remark:

Explanation: Ampicillin is a semi-synthetic derivative of penicillin and belongs to the β-lactam group of antibiotics. It inhibits bacterial cell wall synthesis and is effective against a wide range of gram-positive and gram-negative bacteria. Therefore, it is classified as a broad-spectrum antibiotic. Paracetamol is not an antibiotic, and penicillin is a narrow-spectrum antibiotic.


Q: Which of the following is not a member of vitamin B Complex ?

A: Thiamine

B: Riboflavin

C: Folic acid

D: Ascorbic acid



Correct Option: D  [ Ascorbic acid ]

Remark:

Explanation: Ascorbic acid is not a member of the vitamin B complex; it is actually vitamin C. The vitamin B complex includes vitamins like thiamine (B₁), riboflavin (B₂), niacin (B₃), folic acid (B₉), and others that play important roles in metabolism and energy production.


Q: __________ is the first missile developed in India.

A: Agni

B: Aakash

C: Trishul

D: Prithvi



Correct Option: D  [ Prithvi ]

Remark:

Explanation: Prithvi was the first indigenously developed missile of India, designed under the Integrated Guided Missile Development Programme (IGMDP) launched in 1983 by the Defence Research and Development Organisation (DRDO). It is a surface-to-surface short-range ballistic missile (SRBM) capable of carrying both conventional and nuclear warheads. The Prithvi missile series includes Prithvi-I (Army version), Prithvi-II (Air Force), and Prithvi-III (Navy), with ranges varying from 150 km to 350 km.


Q: Angle of friction and angle of repose are:

A: equal to each other

B: not equal to each other

C: proportion to each other

D: none of the above



Correct Option: A  [ equal to each other ]

Remark:

Explanation: The angle of friction and the angle of repose are equal to each other. The angle of friction is the angle made by the resultant of the limiting friction and normal reaction with the normal force, while the angle of repose is the maximum angle of an inclined plane at which an object just begins to slide. Both represent the same physical condition of impending motion.

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