Which of the following equations represents a addition reaction...? Mcqs

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Which of the following equations represents a addition reaction...?

(A) AB → A+B
(B) A → AB

(C) A+B → AB
(D) AB → A+C

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Gears can do all of the following except...?

(A) Change speed
(B) Change direction

(C) Change force
(D) Change fulcrum

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Diameter of Sun is_____________...?

(A) 12 Lakh kms
(B) 13 Lakh kms

(C) 14 Lakh kms
(D) 15 Lakh kms

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Which of the following waves have smallest velocity in vacuum...?

(A) Ultraviolet
(B) Sound

(C) Infra-Red
(D) Micro

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Solubility is usually expressed in grams of the solute dissolved in ________ gram of a solvent....?

(A) 10 grams
(B) 100 grams

(C) 500 grams
(D) 1000 grams

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A point directly below the sesmic focus is...?

(A) Cleft
(B) Epicentre

(C) Incentre
(D) Orthocentre

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Who invented steamboat...?

(A) James Watt
(B) Robert Fluton

(C) Frank Whittle
(D) George Stephenson

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Which isotope is used to identity efficiency rates of organic and inorganic fertilizers...?

(A) Phosphorus - 32
(B) Carbon - 14

(C) Lead - 210
(D) Nitrogen - 15

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Which of the following pollutants in water causes “Minamata disease...?

(A) Methyl Mercury
(B) Lead

(C) Salmonella
(D) Perchlorate

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Humans can hear in the range of ______ to _______Hertz (Hz)....?

(A) 10 Hz to 10,000 Hz.
(B) 20 Hz to 20,000 Hz.

(C) 30 Hz to 30,000 Hz.
(D) 40 Hz to 40,000 Hz.

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