Everyday Science MCQs

5120 MCQs  (Page 214 of 512)

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Turpentine is obtained from___________?
A. Oak tree
B. Pine tree
C. Birch tree
D. Lemon tree
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_____________ surfactants perform well over a wide range water hardness and PH?
A. Anionic
B. Cationic
C. Nonionic
D. Neutral
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Commercial detergents contain mainly _____________?
A. Rcoon
B. Rona
C. Rsna
D. Roso3na
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Which one of the following is caustic potash?
A. Naoh
B. Koh
C. Nacl
D. Nabh4
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The carbon-carbon bond strength is maximum in__________?
A. Ch3ch3
B. Ch2=ch2
C. Benzene
D. Cyclohexane
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Which of the following effects best explains that o-nitrophenol is insoluble in water?
A. Inductive effect
B. Resonance effect
C. Intermolecular h-bonding
D. Isomeric effect
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Which one of the following is most acidic?
A. Phenol
B. P-nitrophenol
C. O-nitrophenol
D. M-nitrophenol
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Chlorine Cl when attached to benzene has________?
A. +i and +r effect
B. -1 and +r effect
C. +1 and -r effect
D. -i and -r effect
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The criteria for aromaticity is presence of_________?
A. Unsaturations
B. Cyclic structure
C. Presence of 4nπ electrons
D. Presence of 4n+2π electrons
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The bond angle between hybrid orbitals in methane CH3 is___________?
A. 115.5°
B. 109.5°
C. 105. 7°
D. 180°
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Word of the Day
24 Jul
Untenable
(especially of a position or view) not able to be maintained or defended against attack or objection.
ناقابل مدافعت، غیر مستحکم، جو دلیل سے ثابت نہ ہو سکے

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