CTET Solved Paper - UTET September 2013 Paper2
96. The audible range for human ear is
- Option : D
- Explanation : (D) The human ear can respond to minute pressure vibrations in the air if they are in the audible frequency range of approx 20Hz to 20 KHz(20000 Hz)ยท
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97. When a computer works, what will three steps to complete it?
- Option : B
- Explanation : (B) A computer works when we give an input first. This input is processed by its processor to give output. So the correct sequence is Input → Processing → Output.
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98. Clotting of blood occurs due to the presence of .............. in blood.
- Option : D
- Explanation : (D) Clotting of blood occurs due to the presence of platelets in the blood. These are the tiny particles in the blood released into the bone marrow that gather together and form a barrier to further bleeding.
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99. B aSoluble vitamin pair in the water is
- Option : A
- Explanation : (A) Vitamin B and C are water. So these vitamin do not stay in the body for longtime. This makes than dietary requirement on daily basis
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100. Clear sky is observed blue because of
- Option : B
- Explanation : (B) A clear cloudless sky appears blue at day time because molecules in the air scatter blue light from sun more than they scatter red light
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