Brass gets discoloured in air because of the presence of which of the following gases in air ________ ...? Mcqs

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Brass gets discoloured in air because of the presence of which of the following gases in air ________ ...?

(A) Carbon dioxide
(B) Oxygen

(C) Nitrogen
(D) Hydrogen sulphide

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The protein content in wheat is approximately_______________...?

(A) 6%
(B) 9%

(C) 12%
(D) 15%

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The pancreas secrets___________...?

(A) Insulin
(B) Vitamin A

(C) Bile juice
(D) none of these

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Which gas is responsible for fermentation...?

(A) Carbon Dioxide
(B) Nitrogen

(C) Oxygen
(D) None

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Atmospheric pressure acts in _____...?

(A) Only upwards
(B) Only downwards

(C) All directions
(D) Horizonal only

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An optical instrument which is used measure the properties of visible light is called...?

(A) Microscope
(B) Telescope

(C) Spectroscope
(D) Oscilloscope

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A normal platelets count range ...?

(A) 1.5 lac  – 4.5 lac platelets per liter blood.
(B) 1.5 lac – 4.5 lac platelets per micro-liter of blood.

(C) 1.5 million  – 4.5 million platelets per liter of blood.
(D) 1.5 million  – 4.5 million platelets per micro-liter of blood.

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Which organs of plants help in reproduction...?

(A) Stems
(B) Flowers

(C) Roots
(D) Leaves

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Which one of the following is not a fraction of crude oil...?

(A) Petroleum coke
(B) Ammonia

(C) Fuel oil
(D) Paraffin wax

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The audible range of normal human ear is ____...?

(A) 16 Hz to 20kHz
(B) 10 Hz to 31kHz

(C) 67 Hz to 45kHz
(D) 20 Hz to 20kHz

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