The permanent hardness of water is due to presence ______...? Mcqs

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The permanent hardness of water is due to presence ______...?

(A) MgSO4
(B) Mg(HCO3)₂

(C) CA(HCO3)2
(D) All of these

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How many teeth are there in human mouth...?

(A) 30
(B) 33

(C) 32
(D) 31

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A method which is used to separate coloured chemicals or substances, especially dyes is known as...?

(A) Filtration
(B) Sublimation

(C) Paper chromatography
(D) Distillation

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Most protists are ______...?

(A) Terrestrial
(B) Fungal

(C) Photosynthetic
(D) Aquatic

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Summer solstice means__________...?

(A) longest day
(B) longest night

(C) smallest day
(D) none of these

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A common skin condition that causes skin redness and irritation is known as_________...?

(A) Psoriasis
(B) Hypermetropia

(C) Leukoderma
(D) Diphtheria

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Which of the following flower is called Queen of Water...?

(A) Rose
(B) Lilly

(C) Rafflesia
(D) Tulip

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Which of the following vitamin is known as Niacin...?

(A) vitamin B-6
(B) vitamin B-12

(C) vitamin B-1
(D) vitamin B-3

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Heavy mechanical complex use a large amount of water for_________...?

(A) Cooling
(B) Freezing

(C) Washing
(D) Mixing

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Which type of bond is formed between H₂O molecules...?

(A) Hydrogen bond
(B) Ionic bond

(C) Covalent bond
(D) All of these

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