The human brain uses__________ percent of the total oxygen and blood in the body...? Mcqs

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The human brain uses__________ percent of the total oxygen and blood in the body...?

(A) 20
(B) 12

(C) 35
(D) 48

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The process involved in making soap is called...?

(A) saponification
(B) hydrolysis

(C) condensation
(D) polymerisation

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The Genetic constitution of a trait is called _____...?

(A) Genotype
(B) Phenotype

(C) Genome
(D) Phenyl

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Exosphere interacts with ___________ of Earth at roughly distance of 10,000 km....?

(A) Electrosphere
(B) Magnetosphere

(C) Spectrosphere
(D) Echosphere

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Covalent network crystals have_____________...?

(A) higher melting point then molecular crystals
(B) lower melting point then molecular crystals

(C) discrete molecules linked by Van der waals forces
(D) hydrogen bonding

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In winter an iron pipe feel colder than a wooden window . This is because wood is_______...?

(A) Conductor
(B) Non-Conductor

(C) Semi- Conductor
(D) Not a solid while iron is a solid

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A state of stress caused by concern for the earth’s environment is called...?

(A) Eco-anxiety
(B) Eco-fear

(C) Eco-depression
(D) Eco-alarm

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A lake starts freezing because of the cold atmosphere. It will first freeze...?

(A) At the bottom
(B) ln the middle pan

(C) At the top surface
(D) Uniformly throughout the water body

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The breakdown of food molecules to release energy is called...?

(A) Photosynthesis
(B) Fermentation

(C) Respiration
(D) Mitosis

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The circuits in most businesses places and homes are connected in ____...?

(A) Series
(B) Parallel

(C) Both A and B
(D) None

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