The process of emission of electrons from the hot metal surfaces is called...? Mcqs

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The process of emission of electrons from the hot metal surfaces is called...?

(A) Plastic emission
(B) Thermionic emission

(C) Static emission
(D) Current emission

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A blood alcohol level above ________ will often result in death:...?

(A) 0.10
(B) 0.20

(C) 0.30
(D) 0.41

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Human population growth is greatest in developing countries because ...?

(A) the birth rate is high in developing countries
(B) the death rate is high in developing countries.

(C) much of the population has already reached the child bearing age.
(D) most of the world’s population lives in industrialized countries.

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Which one of the following is not a true fruit...?

(A) Apple
(B) Grapes

(C) dates
(D) plum

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The Velocity of light in a diamond is (whereas the refractive index of a diamond with respect to vacuum is 2.5)...?

(A) 5x10^8m/s
(B) 2.5x10^8m/s

(C) 1.2x10^10m/s
(D) 1.2x10^8m/s

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Which has highest fuel value...?

(A) Charcoal
(B) Gasoline

(C) Hydrogen
(D) None of these

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How many grams in an ounce...?

(A) 20
(B) 24

(C) 28
(D) 32

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Enzymes catalyze chemical reaction by _____ the activation energy....?

(A) Raising
(B) Lowering

(C) Maintaining
(D) Ignoring

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The lens which coverage a beam of parallel rays of light are called ____...?

(A) Diverging lens
(B) Converging lens

(C) Cylindrical lens
(D) None

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Milk contains water...?

(A) 70%
(B) 75%

(C) 87%
(D) 90%

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