General Science: Questions and Answers
(Chapter: 20)
621. Which chemically inactive gases are usually filled in bulbs to prolong the life of filament?
Nitrogen & Argon
622. What is the SI unit of electric power?
Watt
623. What is the name of the device that reverses the direction of flow of current through a circuit?
Commutator
624. Which instrument can detect the presence of a current in a circuit?
Galvanometer
625. In India, what is the frequency of Alternating Current (AC)?
50 Hz
626. What is the potential difference of AC supplied in India?
220 V
627. A generator converts ---------- energy into electrical energy?
Mechanical energy
628. What is the working principle of a generator?
Electromagnetic induction
629. In hydroelectric power plants, which energy of water is converted into electrical energy?
Kinetic energy
630. The greater the percentage of-------------- in a fuel, the greater is its calorific value.
Hydrogen
631. The process of burning of material in the absence of oxygen is known as -----------
Destructive distillation
632. Which chemical is produced through the Solvency process or ammonia-soda process?
Sodium carbonate
633. Which colour is showed by a universal indicator in a solution with neutral pH value?
Green
634. Ponds look shallow due to the --------- of light.
Refraction
635. Which metal alloy is used to make permanent magnets?
Alnico
636. The force of attraction which stick the water particles at the window glass is -------------
Adhesion
637. What is the process in which two light nuclei to form a heavier nucleus with the release of energy?
Nuclear fusion
638. What is the working principle of an atomic bomb?
Nuclear fission
639. What will be the weight of a body at the centre of Earth?
Zero (Neutralised)
640. What is the power of an ordinary torch cell?
1.5 volt
641. Which colour is seen on the outer edge of a rainbow?
Red
642. Which device is used for detecting even feeble current?
Galvano scope
643. Which is the strongest force in nature?
Nuclear force
644. Which rays of the sunlight makes solar cooker hot?
Infrared rays
645. The capillary action phenomenon of water rising up a narrow tube dipped in water is due to
Surface tension
646. The image formed by a plane mirror is ..........
Virtual image
647. Which kind of cells converts light energy to electric energy?
Photoelectric cells
648. Muddy water is an example of a solution.
Colloidal solution
649. Which rays of sunlight is absorbed by carbon dioxide molecules in the atmosphere?
Infrared rays
650. Which type of waves a cellular phone uses to operate?
Microwaves
651. Bats can understand obstacles because they produce -------------
Ultrasonic sound waves
652. Which process is used to separate water & alcohol?
Distillation
653. Which was the first planet founded by Mathematical prediction rather than by empirical observation?
Neptune
654. Liquefied natural gas or LNG is natural gas, predominantly composed of?
Methane
655. The mineral form of which chemical is known as Sassolite?
Boric Acid
(Chapter: 20)
621. Which chemically inactive gases are usually filled in bulbs to prolong the life of filament?
Nitrogen & Argon
622. What is the SI unit of electric power?
Watt
623. What is the name of the device that reverses the direction of flow of current through a circuit?
Commutator
624. Which instrument can detect the presence of a current in a circuit?
Galvanometer
625. In India, what is the frequency of Alternating Current (AC)?
50 Hz
626. What is the potential difference of AC supplied in India?
220 V
627. A generator converts ---------- energy into electrical energy?
Mechanical energy
628. What is the working principle of a generator?
Electromagnetic induction
629. In hydroelectric power plants, which energy of water is converted into electrical energy?
Kinetic energy
630. The greater the percentage of-------------- in a fuel, the greater is its calorific value.
Hydrogen
631. The process of burning of material in the absence of oxygen is known as -----------
Destructive distillation
632. Which chemical is produced through the Solvency process or ammonia-soda process?
Sodium carbonate
633. Which colour is showed by a universal indicator in a solution with neutral pH value?
Green
634. Ponds look shallow due to the --------- of light.
Refraction
635. Which metal alloy is used to make permanent magnets?
Alnico
636. The force of attraction which stick the water particles at the window glass is -------------
Adhesion
637. What is the process in which two light nuclei to form a heavier nucleus with the release of energy?
Nuclear fusion
638. What is the working principle of an atomic bomb?
Nuclear fission
639. What will be the weight of a body at the centre of Earth?
Zero (Neutralised)
640. What is the power of an ordinary torch cell?
1.5 volt
641. Which colour is seen on the outer edge of a rainbow?
Red
642. Which device is used for detecting even feeble current?
Galvano scope
643. Which is the strongest force in nature?
Nuclear force
644. Which rays of the sunlight makes solar cooker hot?
Infrared rays
645. The capillary action phenomenon of water rising up a narrow tube dipped in water is due to
Surface tension
646. The image formed by a plane mirror is ..........
Virtual image
647. Which kind of cells converts light energy to electric energy?
Photoelectric cells
648. Muddy water is an example of a solution.
Colloidal solution
649. Which rays of sunlight is absorbed by carbon dioxide molecules in the atmosphere?
Infrared rays
650. Which type of waves a cellular phone uses to operate?
Microwaves
651. Bats can understand obstacles because they produce -------------
Ultrasonic sound waves
652. Which process is used to separate water & alcohol?
Distillation
653. Which was the first planet founded by Mathematical prediction rather than by empirical observation?
Neptune
654. Liquefied natural gas or LNG is natural gas, predominantly composed of?
Methane
655. The mineral form of which chemical is known as Sassolite?
Boric Acid
PSC Solved Question Papers ---> Click here
PSC TODAY's EXAM RESULTS ---> Click here
PSC EXAM PROGRAMME -> Click here
CURRENT AFFAIRS QUESTIONS -> Click here
PSC Degree Level Questions & Answers - Click here
PSC 10th, +2 Level Questions & Answers - Click here
PSC RANK LISTS / SHORTLISTS -> Click here
TEACHING APTITUDE TEST (K-TET, C-TET,, etc.) ---> Click here* SCERT KERALA TEXTBOOKS FOR CLASS II, IV, VI, VIII, IX, X, XII – FREE DOWNLOAD ---> Click here
* NCERT & CBSE TEXTBOOKS FOR ALL CLASSES – FREE DOWNLOAD ---> Click here
* SCERT TEXTBOOKS SOLUTIONS FOR ALL CLASSES ---> Click here
* NCERT & CBSE TEXTBOOKS SOLUTIONS FOR ALL CLASSES ---> Click here
0 Comments