Chemical formula of baking soda is ______...? Mcqs

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Chemical formula of baking soda is ______...?

(A) Na2CO3
(B) K2CIO3

(C) Na2SO4
(D) NaHCO3

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Which gas is used in fire extinguisher...?

(A) Nitrogen
(B) Carbon Dioxide

(C) Oxygen
(D) Nitrogen

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Which of the following gases is most predominant in the Sun...?

(A) Helium
(B) Hydrogen

(C) Nitrogen
(D) Ozone

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Which gas can be ventilated buildings accumulated in poorly...?

(A) Xenon
(B) Hydrogen

(C) Radon
(D) Helium

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The process of emoving water in the form of vapour from theleaves is called:...?

(A) Nutrition
(B) Respiration

(C) Perspiratin
(D) Transpiration

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Which is the hardest among following...?

(A) Radium
(B) Diamond

(C) Graphite
(D) Gold

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Which of the following metals is not only magnetic but also radioactive...?

(A) Thorium
(B) Aluminum

(C) Iron
(D) None of these

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Cooking gas is also called...?

(A) Butane
(B) Hexane

(C) Propane
(D) LPG

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What is the most abundant element in the universe...?

(A) Hydrogen
(B) Oxygen

(C) Sodium
(D) Copper

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اوزون لیئر کو سب سے ذیادہ نقصان کون سا مادہ کرتا ہے۔۔۔؟

(A) سلفر
(B) زنگ

(C) ہائیڈروجن
(D) کاربن

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