speed of sound in dry air at 20 °C is___________...? Mcqs

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speed of sound in dry air at 20 °C is___________...?

(A) 353 m/s
(B) 345 m/s

(C) 343 m/s
(D) none of them

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Once you have the data, you may need to perform _____ analysis....?

(A) Mathematical
(B) Qualitative

(C) Quantitative
(D) Logical

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Approximate age of moon is _________...?

(A) 4.51 billion years
(B) 4.55 billion years

(C) 4.53 billion years
(D) 4.57 billion years

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Curie is a unit of measuring the intensity of ___________...?

(A) Radioactivity
(B) Quantity of Heat

(C) Work or Energy
(D) Power

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B12 deficiency can produce__________...?

(A) Insomnia
(B) Microcytic anemia

(C) Pernicious anemia
(D) None Of these

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Chromosomes consist of two genetically identical copies of thread called...?

(A) Chromonema
(B) Chromosomes

(C) Chromatids
(D) Chromatin

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Choose the correct statement regarding lock and key model...?

(A) Enzyme and substrate posses' specific complementary geometric shapes
(B) Active site of enzyme is flexible

(C) Active site continuously changes
(D) All above statements are correct

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Freezing point of water is__________...?

(A) 0°C
(B) -2°C

(C) -4°C
(D) None of above

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Scientists who forecasting weather by continuously tracking and predicting the path of tornadoes, hurricanes or floods are called...?

(A) Geologists
(B) Meteorologists

(C) Astronomers
(D) Oceanographers

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A Fahrenheit thermometer indicates a temperature of ‘ 14°F. its corresponding reading on the Celsius scale will be _________...?

(A) – 2O°C
(B) – 10°C

(C) + 10°C
(D) + 20°C

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