The type/s of pollution is/are ______...? Mcqs

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The type/s of pollution is/are ______...?

(A) Air Pollution
(B) Water Pollution

(C) Land Pollution
(D) All of these

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10% (w/w) sugar solution mean that 10 grams of solute dissolved in...?

(A) 90g of water
(B) 95g of water

(C) 100g of water
(D) 105g of water

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The study of organisms and their environment is known as ________...?

(A) Acoustics
(B) Ecology

(C) Ichthyology
(D) None of these

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Which one of the following is not a sign of physical change...?

(A) Change that can be reversed
(B) The substance does not turn into a new substance

(C) A release of gas
(D) None

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Myopia is a defect of Human eye. it can be corrected by using a lens called...?

(A) Convex lens
(B) Concave lens

(C) Cylindrical lens
(D) Plano convex lens

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The waves that have maximum penetrating power to treat tumors are ______...?

(A) Ultraviolet radiation
(B) Microwaves

(C) Gamma-rays
(D) Radio waves

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All accurately known digits and first doubtful digit in an expression are known as...?

(A) Non-significant figures
(B) Significant figures

(C) Estimated figures
(D) Crossed figures

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Which mineral is the present in meat, onion, eggs, iodized salt and seafood...?

(A) Calcium
(B) Iodine

(C) Magnesium
(D) Copper

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Isotopes of an element are identical in ____...?

(A) Mass number
(B) Electron number

(C) Valency
(D) Atomic number

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For which system does the equilibrium constant, Kc has units of concentration....?

(A) N2(g) + 3H2(g) ⇌ 2NH3(g)
(B) N2(g) + 02(g) ⇌ 2NO

(C) H2(g) +12(g) ⇌ 2HI(g)
(D) CO2(g) + H3(g) ⇌ CO + H2O(l)

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