Periscope is another optical instrument that works on the principle of total ____...? Mcqs

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Periscope is another optical instrument that works on the principle of total ____...?

(A) Refraction
(B) Diffraction

(C) External Reflection
(D) Internal Reflection

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Which one of the following forms weak electrolyte solution with water...?

(A) CH₃COOH
(B) H₂SO₄

(C) NaCl
(D) None of these

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Soap is the term for a salts of a ______...?

(A) Carboxylic acid
(B) Citric acid

(C) Sulphuric acid
(D) Fatty acid

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The atmospheric greenhouse effect is produced mainly by the __________________...?

(A) Absorption and re-emission of visible light by the atmosphere
(B) Absorption and re-emission of ultraviolet radiation by the atmosphere

(C) Absorption and re-emission of infrared radiation by the atmosphere
(D) Absorption and re-emission of visible light by clouds

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Flame test of Copper Halide with bluish-green color identify the presence of ______...?

(A) Halogen
(B) Hydrogen

(C) Copper
(D) B and C

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The order of speed of the sound in different mediums from faster to slowest is ______...?

(A) Gas → Liquid → Solid
(B) Liquid → Solid → Gas

(C) Solid → Liquid → Gas
(D) Gas → Solid → Liquid

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When one atom forms cation by losing electron and other forms anion by accepting that electron then bond form between them is ______...?

(A) Covalent bond
(B) Ionic bond

(C) Coordinate covalent bond
(D) Hydrogen bond

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Which one of the following affects the photosynthesis and growth of plants...?

(A) Hydrogen
(B) Oxygen

(C) Nitrogen
(D) Acid Rain

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Photography works by...?

(A) Capturing the souls of the objects being photographed
(B) Capturing light reflected from the objects being photographed

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

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Clocks, which moves with the velocities comparable with the velocity of light, run ...?

(A) fast
(B) slow

(C) equal to the velocity of light
(D) with zero velocity

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