Which of the following atmospheric layers help in radio communication...? Mcqs

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Which of the following atmospheric layers help in radio communication...?

(A) Exosphere
(B) Ionosphere

(C) Troposphere
(D) Stratosphere

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The circuit that provides two or more paths for the current is called...?

(A) Series Circuit
(B) Short Circuit

(C) Parallel Circuit
(D) Open Circuit

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___________ is a strong smelling agent added to LPG cylinders to detect leakage...?

(A) Nitrogen Peroxide
(B) Ethyl Mercaptan

(C) Carbon Monoxide
(D) Sulphur Dioxide

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Radio labeling and carbon dating also show some uses of radioactive isotopes in determining the ____ of fossils....?

(A) Size
(B) Age

(C) Shape
(D) Color

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State of matter which has definite shape and volume is called __________...?

(A) Liquid
(B) Gas

(C) Solid
(D) None of these

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The main factor for determining a region’s climate is ___________...?

(A) Latitude
(B) Temperature

(C) Longitude
(D) None of them

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Second ionization energy:...?

(A) is always less than first ionization energy
(B) is always greater than first ionization energy

(C) is equal to the first ionization energy
(D) may be greater or less than the first ionization energy depending on the nature of the element

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In thrombocytopenia condition, bone marrow makes...?

(A) Too few platelets
(B) Normal platelets

(C) Too many platelets
(D) Does not effect

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the delicate lungs are protected by a cage that is called ______...?

(A) luvcage
(B) Ribcage

(C) both A & B
(D) None of these

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Which statement is incorrect about gas molecules...?

(A) Molecules are widely separated
(B) Molecules have low attractive forces

(C) Molecules free to move in any direction
(D) Molecules collide with one another

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