General Science: Questions and Answers
(Chapter: 24)
761. What converts mechanical energy into electrical energy?
Dynamo
762. Which type of lens is used in cameras?
Convex lens
763. Which type of glass is used for making lenses?
Flint glass
764. Which was the first organic compound prepared in a laboratory?
Urea
765. The nuclear radiation first affects which organ of the human body?
Brain
766. Which metal has the highest melting point?
Tungsten
767. Which is the most abundant element in the Moon?
Oxygen
768. Molisch test is used to detect the presence of.
Carbohydrates
769. Which is the most abundant type of coal?
Bituminous
770. Which halogen is used as an antiseptic?
Iodine
771. Plaster of Paris is prepared by heating.
Gypsum
772. Which element has the largest number of isotopes?
Tin
773. Silver objects turn dark on prolonged exposure to air due to the formation of.
Silver sulphide
774. Who discovered radiocarbon dating?
Willard Franck Libby
775. Which sugar is found maximum in honey?
Fructose
776. Which disease is also known as 'Bronchocele'i
Goitre
777. In the human body, the structure to which appendix is attached?
Large intestine
778. Which hormone regulates calcium & phosphate in a human body?
Parathyroid hormone
779. Which is the smallest unit of an element that takes part in a chemical reaction?
Electron
780. What is the period of revolution of a geostationary satellite?
24 hours
781. Which type of mirror is used in the headlamp of cars?
Parabolic concave
782. The eustachian tube connects which parts of the body?
Ear&throat
783. The number of molecules contained in one mole of a gas is called.
Avogadro number
784. Which acid is usually present in the fizzy soft drinks?
Carbonic acid
785. Which property of a star is indicated by its colour?
Temperature
786. Which metal is used in the storage batteries?
Lead
787. Who invented the ultrasound scanning?
Ian Donald
788. In the process of dialysis, used on kidney patients, the phenomenon involved is.
Osmosis
789. Which is the longest key in a computer keyboard?
Space bar
790. Which part of the brain controls the heartbeats?
Medulla Oblongata
791. Which gas is used for the artificial ripening of fruits?
Ethylene
792. Which organ of body purifies blood?
Kidney
793. Which microorganisms cause the foot & mouth disease in animals?
Virus
794. The radioactive disintegration of uranium ultimately leads to.
Lead
795. Which gas is used in the welding industry?
Acetylene
(Chapter: 24)
761. What converts mechanical energy into electrical energy?
Dynamo
762. Which type of lens is used in cameras?
Convex lens
763. Which type of glass is used for making lenses?
Flint glass
764. Which was the first organic compound prepared in a laboratory?
Urea
765. The nuclear radiation first affects which organ of the human body?
Brain
766. Which metal has the highest melting point?
Tungsten
767. Which is the most abundant element in the Moon?
Oxygen
768. Molisch test is used to detect the presence of.
Carbohydrates
769. Which is the most abundant type of coal?
Bituminous
770. Which halogen is used as an antiseptic?
Iodine
771. Plaster of Paris is prepared by heating.
Gypsum
772. Which element has the largest number of isotopes?
Tin
773. Silver objects turn dark on prolonged exposure to air due to the formation of.
Silver sulphide
774. Who discovered radiocarbon dating?
Willard Franck Libby
775. Which sugar is found maximum in honey?
Fructose
776. Which disease is also known as 'Bronchocele'i
Goitre
777. In the human body, the structure to which appendix is attached?
Large intestine
778. Which hormone regulates calcium & phosphate in a human body?
Parathyroid hormone
779. Which is the smallest unit of an element that takes part in a chemical reaction?
Electron
780. What is the period of revolution of a geostationary satellite?
24 hours
781. Which type of mirror is used in the headlamp of cars?
Parabolic concave
782. The eustachian tube connects which parts of the body?
Ear&throat
783. The number of molecules contained in one mole of a gas is called.
Avogadro number
784. Which acid is usually present in the fizzy soft drinks?
Carbonic acid
785. Which property of a star is indicated by its colour?
Temperature
786. Which metal is used in the storage batteries?
Lead
787. Who invented the ultrasound scanning?
Ian Donald
788. In the process of dialysis, used on kidney patients, the phenomenon involved is.
Osmosis
789. Which is the longest key in a computer keyboard?
Space bar
790. Which part of the brain controls the heartbeats?
Medulla Oblongata
791. Which gas is used for the artificial ripening of fruits?
Ethylene
792. Which organ of body purifies blood?
Kidney
793. Which microorganisms cause the foot & mouth disease in animals?
Virus
794. The radioactive disintegration of uranium ultimately leads to.
Lead
795. Which gas is used in the welding industry?
Acetylene
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