Q: Which polymer is used in making non-stick kitchen ware ?

A: Nylon

B: PVC

C: Bakelite

D: Teflon



Correct Option: D  [ Teflon ]

Remark:

Explanation: Teflon, also known as polytetrafluoroethylene (PTFE), is the polymer used in making non-stick kitchenware. It has a very low coefficient of friction and is resistant to heat and chemicals, which prevents food from sticking to cookware surfaces.


Q: How many bones are there in each hand of an adult human being?

A: 19

B: 27

C: 37

D: none of these



Correct Option: B  [ 27 ]

Remark:
8 carpal bones (Wrist).
5 metacarpal bones (Palm).
12 phalanges (Fingers).
02 sesamoid bones at the base of the thumb.
total to 27 bones in each hand.
.
Adult Human Body-206,


Q: Angora wool is extracted from

A: rabbit

B: sheep

C: fox

D: goat



Correct Option: A  [ rabbit ]

Remark:

Explanation: Angora wool is obtained from the Angora rabbit, a special breed reared mainly for its soft, silky, and warm fur. The wool fibers are extremely fine and have a high insulating property, making them ideal for luxury clothing. It is different from Mohair (from Angora goat) and Cashmere (from Kashmiri goat).


Q: A fuse wire has :

A: high resistance and high melting point

B: low resistance and high melting point

C: low resistance and low melting point

D: high resistance and low melting point



Correct Option: D  [ high resistance and low melting point ]

Remark:

A fuse wire has high resistance and a low melting point. It is made of materials like tin-lead alloy so that it melts quickly when excessive current flows through the circuit. This breaks the circuit and prevents damage to electrical appliances due to overheating or short circuits.

  • High resistance: Causes heating when excess current passes.
  • Low melting point: Ensures the fuse melts easily to interrupt the circuit.


Q: Nitrogen is an essential constituent of all:

A: Carbohydrates

B: Fats

C: Proteins

D: Vitamins



Correct Option: C  [ Proteins ]

Remark:

Explanation: Proteins are complex organic compounds composed of smaller units called amino acids. Each amino acid contains an amino group (–NH₂), which contributes nitrogen to the molecular structure. This makes nitrogen an essential element in all proteins. Carbohydrates and fats lack nitrogen, while only some vitamins contain it.


Q: A radar which detect the presence of an aircraft in sky uses :

A: Sound waves

B: Radio waves

C: Ultrasonic waves

D: Infrared rays



Correct Option: B  [ Radio waves ]

Remark:

Explanation: RADAR (Radio Detection and Ranging) works by using radio waves to detect and determine the distance, speed, and position of objects such as aircraft, ships, and vehicles. The radar system transmits radio waves, which travel through the air, hit an object, and get reflected back to the radar receiver. By measuring the time delay between transmission and reception, the radar calculates the object's distance and motion. Radio waves are ideal because they can travel long distances, penetrate clouds, and are unaffected by weather conditions.


Q: The age Of trees is determined by its

A: height

B: girth

C: general appearance

D: growth rings



Correct Option: D  [ growth rings ]

Remark:

Explanation: The age of a tree is determined by counting the annual growth rings (also called annual rings) visible in a cross-section of its trunk. Each ring consists of a light band (spring wood) and a dark band (autumn wood), representing one year of growth. The study of these rings to determine a tree’s age and past climate conditions is known as dendrochronology.


Q: Domestic cooking gas consists of mostly:

A: Methane and ethane

B: Liquifed butane and isobutane

C: Ethylene and carbon monoxide

D: Hydrogen and acetylene



Correct Option: A  [ Methane and ethane ]

Remark:


Q: Gravitational force is maximum at which of the following place?

A: At equator

B: At tropic of cancer

C: At tropic of Capricorn

D: At poles



Correct Option: D  [ At poles ]

Remark:

The gravitational force of the Earth is maximum at the poles and minimum at the equator. This happens because the Earth is not a perfect sphere; it is slightly flattened at the poles and bulged at the equator due to its rotation. The distance from the center of the Earth to the poles is slightly less than that to the equator, resulting in a stronger gravitational pull at the poles.

Other options (for context)

  • At equator: Gravity is slightly weaker because of the Earth's bulge and centrifugal force due to rotation.
  • At tropic of cancer: Gravity here is intermediate, not maximum.
  • At tropic of Capricorn: Same as the Tropic of Cancer — gravity is moderate, not maximum.


Q: What is commonly known as white plague?

A: Typhoid

B: Malaria

C: Tuberculosis

D: Plague



Correct Option: C  [ Tuberculosis ]

Remark:

Tuberculosis (TB) is commonly known as the "White Plague". It earned this name because it causes extreme paleness and weight loss in affected individuals. Tuberculosis is an infectious disease caused by the bacterium Mycobacterium tuberculosis, primarily affecting the lungs but can also spread to other parts of the body. It spreads through airborne droplets when an infected person coughs or sneezes.

Other options (for context)

  • Typhoid: Caused by Salmonella typhi, affects the intestine and causes high fever.
  • Malaria: Caused by Plasmodium parasite transmitted through mosquito bites.
  • Plague: Caused by Yersinia pestis, historically known as the “Black Death,” not the white plague.
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