Tendency of atoms to acquire eight electrons in their valence shell is ______...? Mcqs

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Tendency of atoms to acquire eight electrons in their valence shell is ______...?

(A) Octet rule
(B) Duplet rule

(C) Triplet rule
(D) None of above

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What are the charges of Proton, Electron, and Neutron respectively...?

(A) Negative, Positive, Neutral
(B) Neutral, Negative, Positive

(C) Positive, Negative, Neutral
(D) Neutral, Positive, Negative

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The heaviest naturally-occurring element is_________...?

(A) Radium
(B) Platinum

(C) Uranium
(D) Cadmium

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A change that alters the composition of a substances is known as ____...?

(A) Physical Change
(B) Nuclear Change

(C) Chemical Change
(D) Biological Change

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Coke is made by heating coal in the absence of air at__________...?

(A) 700 °C
(B) 900 °C

(C) 1300 °C
(D) 1700 °C

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Two bulbs are connected in a series circuit. One bulb blows (blast), what will happen to the other bulb...?

(A) Will glow brighter
(B) Also blow (blast)

(C) Remains same
(D) Will glow dimmer

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What is the key role of decomposers...?

(A) Break down living plants
(B) Break down dead animals

(C) Provide food for animals
(D) None

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Which animal can create the loudest sound among any living creature...?

(A) Donkey
(B) Monkey

(C) Humpback whales
(D) None of these

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The water has minimum density at _____...?

(A) O°C
(B) 2°C

(C) 3°C
(D) 4°C

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The volume of air remaining in the lungs even after forcible expiration is:...?

(A) total volume
(B) tidal volume

(C) residual volume
(D) none of the above

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