What is the chemical formula for Sodium carbonate _______ ...? Mcqs

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What is the chemical formula for Sodium carbonate _______ ...?

(A) Na3CO2
(B) CNa2O3

(C) Na2CO3
(D) Na3CO3

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A thermos flask keeps things close to their original temperature by reducing ____...?

(A) Conduction
(B) Convection

(C) Radiation
(D) All of these

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Which of the following are not deflected by electric and magnetic fields ...?

(A) Alpha rays
(B) Beta rays

(C) Gamma rays
(D) None of these

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What is the name of the substance that dissolves the substance...?

(A) Solute
(B) Solvent

(C) Solution
(D) Mixture

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The uniform or constant fact of nature, virtually an irrefutable theory is _____...?

(A) Scientific theory
(B) Scientific hypothesis

(C) Scientific reasoning
(D) Scientific law

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A ______ is an inclined plane wrapped around a cylinder, used to fasten objects....?

(A) Screw
(B) Lever

(C) Pulley
(D) Wheel

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Our galaxy (Milky Way Galaxy) is _____ in shape....?

(A) Irregular
(B) Spiral

(C) Elliptical
(D) Circular

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What is the unit for the spring constant...?

(A) Nm
(B) Nm^-2

(C) Nm^-1
(D) Nm^2

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The period in which earth has completes a day is...?

(A) Solar day
(B) Lunar day

(C) Sidereal day
(D) Terrestrial day

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If we dissolve sand into the water, then the mixture is said to be _______...?

(A) Solution
(B) Suspension

(C) Colloids
(D) Concentrated solution

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