What is the method that kills harmful microorganisms and prevents the spread of waterborne diseases such as cholera, dysentery, and typhoid...? Mcqs

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What is the method that kills harmful microorganisms and prevents the spread of waterborne diseases such as cholera, dysentery, and typhoid...?

(A) Filtration
(B) Sedimentation

(C) Chlorination
(D) Distillation

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The distance between the optical centre of a convex lens and its principal focus is called its_______...?

(A) Focal Length
(B) Radius of Curvature

(C) Power
(D) Magnification

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Which one affects the speed of sound in the medium...?

(A) pressure
(B) humidity

(C) temperature
(D) all of the above

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Which of the following layers make radio transmission possible...?

(A) Troposphere
(B) Ionosphere

(C) Mesosphere
(D) Stratosphere

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The power of combining of an atom with other atoms to form molecules or compounds is called...?

(A) Atomic Mass
(B) Valency

(C) Electronegativity
(D) Ionization Energy

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Which of the following lens are useful in microscope...?

(A) Convex lens
(B) Concave lens

(C) Curved lens
(D) None of These

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What is the temperature at the center of the Sun...?

(A) 6 million °C
(B) 10 million °C

(C) 15 million °C
(D) 20 million °C

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The unit of Kc for reaction N2 + O2 ⇌ 2NO...?

(A) mol dm^-3
(B) mol^-2 dm^6

(C) mol^-1dm3
(D) No unit

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Soil acidity is corrected by...?

(A) Proper irrigation
(B) Adding sodium hydroxide

(C) Liming
(D) Application of fertilizers

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Which one of the following incorrectly shows the types of vertebrates through its examples...?

(A) Reptile → Snake
(B) Bird → Ostrich

(C) Amphibian → Toad
(D) Mammal → Shark

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