In NaCl crystal lattice each Na ion is surrounded by ______...? Mcqs

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In NaCl crystal lattice each Na ion is surrounded by ______...?

(A) 6 Cl^- ions
(B) 6 Na^+ ions

(C) 8 Cl^- ions
(D) 12 Cl^- ions

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Mercury is also known as_________...?

(A) Shine Silver
(B) Quick Silver

(C) Slow Silver
(D) Slippery Silver

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Omnivores that eat only...?

(A) Only plants
(B) Only animals

(C) Both A and B
(D) None

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What is the degree of rotation of the earth each hour...?

(A) 1°
(B) 5°

(C) 7.5°
(D) 15°

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The sun has a __________ year solar cycle during which its activity increases and decreases....?

(A) 10
(B) 11

(C) 12
(D) 13

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Which of the following elements is not present abundantly in earth’s crust ...?

(A) Silicon
(B) Radium

(C) Aluminum
(D) Carbon

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Where do most of Asteroids lie...?

(A) In asteroid belt between the orbits of Mars and Jupiter
(B) In asteroid belt between the orbits of Mars and Venus

(C) In asteroid belt between the orbits of Jupiter and Venus
(D) Everywhere in the sky

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Which of the following can be used to reduce friction between moving parts of machines...?

(A) Sand
(B) Grease

(C) Gears
(D) Screws

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Angle of friction and angle of repose are...?

(A) equal to each other
(B) not equal to each other

(C) proportional to each other
(D) None of these

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The atmosphere of moon consists of______________...?

(A) 90% Hydrogen, 10% Nitrogen
(B) 80%Nitrogen, 20% Hydrogen

(C) 60% Nitrogen, 40%inert gases
(D) None

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