Which type of the following chemical reaction is CaO + CO2 → CaCO2:...? Mcqs

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Which type of the following chemical reaction is CaO + CO2 → CaCO2:...?

(A) Combination Reaction
(B) Decomposition Reaction

(C) Neutralization Reaction
(D) None

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In an atom number of protons and neutrons are added to obtain ________...?

(A) In an atom number of protons and neutrons are added to obtain ________? Number of electrons
(B) Number of nucleons

(C) Atomic number of element
(D) Number of isotopes

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Which one of the following is not a disadvantage of friction...?

(A) Energy loss
(B) Fasteners

(C) Wear and Tear
(D) Speed limit

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Linear thermal expansion of a solid depend upon ____...?

(A) Increasing in temperature
(B) Original length

(C) Properties of material
(D) All of these

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The Empirical formula of hydrogen peroxide is _______...?

(A) H2O2
(B) HO

(C) OH
(D) O2H2

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Which one of the following elements the drum of a Photostat machine is made up of: _________...?

(A) Aluminium
(B) Selenium

(C) Barium
(D) None of these

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which is the second brightest star in the Universe...?

(A) Betelgeuse
(B) Vega

(C) Canopus
(D) None of these

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Kidney disease happens due to overdose of...?

(A) Vitamin A
(B) Vitamin B

(C) Vitamin C
(D) Proteins

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A solution which can dissolve more solute at given temperature is called...?

(A) Standard Solution
(B) Super Saturated solution

(C) Unsaturated Solution
(D) Saturated Solution

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Who is the Father of Genetics...?

(A) Gregor Mendel
(B) Alexendar

(C) Darewin
(D) Louis pasture

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