CBSE Class 10 Science General Awareness Questions and Answers
CBSE Class 10 Science
QUESTIONS
CBSE Class 10 Science General Awareness Questions and Answers
91 A person cannot see the distant objects clearly (though he can see the nearby objects clearly). He is suffering from the defect of vision called:
A Myopia
B Presbyopia
C Cataract
D Hypermetropia
92 How eyes adjust in order to focus the image of near or distant objects on retina?
A The lens moves in or out according to the position of the object
B The retina moves in or out according to the position of the object
C The lens becomes thicker or thinner according to the position of the object
D The pupil gets larger or smaller according to the position of the object
Answer: The lens becomes thicker or thinner according to the position of the object
93 The term “accommodation” as applied to the eye, refers to its ability to:
A Control the light intensity falling on the retina
B Erect the inverted image formed on the retina
C Adjust the focal length of the lens
D Vary the distance between the lens and retina
Answer: Adjust the focal length of the lens
94 The frequency of electricity produced by DC generator is equal to
A 0 Hz
B 200 Hz
C 50 Hz
D 100 Hz
95 An electric motor is a device which transforms
A Electrical energy into mechanical energy
B Electrical energy into Potential energy
C Kinetic energy into potential energy
D Mechanical energy into electrical energy
Answer: Electrical energy into mechanical energy
96 The shape of the magnetic field lines produced by a current carrying conductor are:
A Concentric circles
B Concentric parabolas
C Straight lines
D Concentric ellipse
Answer: Concentric circles
97 A fuse should always be placed in the
A Earth wire of the main circuit
B Live wire of the main circuit
C Neutral wire of the main circuit
D Bothe live and neutral wire of the main circuit.
Answer: Live wire of the main circuit
98 The excretory unit of the human excretory system is known as:
A Nephron
B kidneys
C Neuron
D Nephridia
99 Which among the following procedures is used for cleaning the blood of a person by separating the waste substance from it?
A Dialysis
B Hydrolysis
C Kidney transplant
D Blood transfusion
100 Among the following choose the correct option which includes the organisms that have a holozoic mode of nutrition:
A Parakeet and Amoeba
B Paramecium and Parasite
C Plasmodium and Amoeba
D Paramecium and Plasmodium
Answer: Parakeet and Amoeba