Most of the ozone in the atmosphere is concentrated in the____________...? Mcqs

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Most of the ozone in the atmosphere is concentrated in the____________...?

(A) Mesosphere
(B) Troposphere

(C) Stratosphere
(D) Ionosphere

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At room temperature most of ionic compounds are ______...?

(A) Amorphous solids
(B) Crystalline solids

(C) Liquids
(D) Gases

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Outer layer of the human skin is called __________...?

(A) Hypodermis
(B) Dermis

(C) Hemidermis
(D) Epidermis

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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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Which of the following is an alcohol...?

(A) CH3-CHO
(B) CH3-CH2-O-CH3

(C) CH3-OH
(D) HCOOH

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Comets are made mostly of ice and dust. As comets get close to the sun, they start to “melt” and release what...?

(A) Steam and dust
(B) Gas and dust

(C) Steam, gas and dust
(D) None of the above

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The density of water is __________...?

(A) 1 g/cm3
(B) 1.5 g/cm3

(C) 2 g/cm3
(D) none of these

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The sun is _________times bigger than the Earth....?

(A) 105
(B) 107

(C) 109
(D) 111

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People with what blood type can give blood to anyone and are thus called universal donors...?

(A) O-
(B) O

(C) AB+
(D) AB-

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Volcanoes are usually located on ________...?

(A) Divergent plate boundaries
(B) Convergent plate boundaries

(C) Hotspots
(D) All of these

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