When sound waves travel from air to water which of the following quantities remains unchanged...? Mcqs

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When sound waves travel from air to water which of the following quantities remains unchanged...?

(A) Speed
(B) Frequency

(C) Intensity
(D) Wavelength

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4th and 5th period in periodic table are known as...?

(A) Short period
(B) Long period

(C) Normal period
(D) Very long period

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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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Defeciency of following vitamin decreases hemoglobin production ...?

(A) Biotin
(B) Thiamine

(C) Niacin
(D) Pyridoxine

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Which of the following is a ferromagnetic material ...?

(A) Tungsten
(B) Aluminium

(C) Copper
(D) Nickel

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Which one of the following is mismatched...?

(A) Proteases → Carbohydrate
(B) Lipases → Lipids

(C) Trypsin → Protein
(D) All are correctly matched

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The nearest Star to the planet earth is ________ ...?

(A) Regel
(B) Canopus

(C) Sun
(D) Betelgeuse

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Each mole of ATP store energy...?

(A) 7.3 kcal/mole
(B) 7.3kj/mole

(C) 17.3kcal/mole
(D) 17.3kj/mole

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The intensity of earthquake is measured by ____...?

(A) Beaufort scale
(B) Richter scale

(C) Mohs scale
(D) None of these

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An antibiotic is a drug used to treat infections caused by ...?

(A) Protein
(B) Bacteria

(C) Virus
(D) All of these

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