CBSE Class 10 Science General Awareness Questions and Answers

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

Answer: Myopia
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

Answer: 0 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

Answer: Nephron
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

Answer: Dialysis
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

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