Potassium nitrate is used in__________...? Mcqs

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Potassium nitrate is used in__________...?

(A) Medicine
(B) Fertilizer

(C) Salt
(D) Glass

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Water soluble vitamins are released by__________...?

(A) Sweat
(B) Tears

(C) Injections
(D) Urine

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In what year did Galileo first use an optical telescope to study the moon...?

(A) 1492
(B) 1609

(C) 1212
(D) 1743

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Mohus scale is used for to measure ____________...?

(A) Hardness
(B) Humidity

(C) Pressure
(D) Temperature

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A _____ is used in submarines to monitor the surface of water....?

(A) Periscope
(B) Telescope

(C) Kaleidoscope
(D) Binoculars

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Which of the following is the world’s loudest bird ...?

(A) White bellbird
(B) Peacock

(C) Piha
(D) None of the above

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The particles of a liquid...?

(A) Are tightly packed and stay in a fixed position
(B) Are free to move in a container but remain in close contact with one another

(C) Are widely spaced and move freely in any direction
(D) Are sparse and vibrate at long distances

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Which type of bond is formed between H₂O molecules...?

(A) Hydrogen bond
(B) Ionic bond

(C) Covalent bond
(D) All of these

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Which of the following is not a chemical reaction ...?

(A) Burning of coal
(B) Conversion of water into steam

(C) Digestion of food
(D) Burning of paper

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Rusting of Iron involves_______________...?

(A) Reduction
(B) Oxidation

(C) Decomposition
(D) Displacement

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