General Science Chemistry MCQs

Chemistry Objective (Multiple Choice) General Knowledge Questions & Answers for SSC-CGL, UPPSC, UPSC, NDA, CDS and UPSC Civil Services Prelims Examination

81. Which of these cannot be the reason for the permanent hardness in water?

[A] calcium sulphate
[B] calcium chloride
[C] calcium bicarbonate
[D] None of the above

Show Answer

82. Why soaps do not work in hard water?

[A] The water tastes bitter and it has an unpleasant smell
[B] The water is hard to boil and the soap only works in boiled water
[C] The insoluble soaps formed separate as scum in water
[D] The hard water has lot of impurities

Show Answer

83. Which of the following is used as a food preservative?

[A] Table salt
[B] Salts of sorbic acid
[C] Sodium benzoate
[D] All of the above

Show Answer

84. Which of these artificial sweeteners has the highest sweetness value?

[A] Saccharin
[B] Sucralose
[C] Aspartame
[D] Alitame

Show Answer

85. What is the sweetness value of Aspartame in comparison to the cane sugar?

[A] 10
[B] 100
[C] 200
[D] 500

Show Answer

86. Which of these drugs is called as the ‘love drug’?

[A] Mescalin
[B] MDMA
[C] Dextromethorphan
[D] Ketamine

Show Answer

87. Cream gets separated out of milk when it is churned due to which of the following reasons?

[A] Gravitational pull
[B] Centripetal force
[C] Centrifugal force
[D] Frictional force

Show Answer

88. Which of the following gases is heavier than oxygen?

[A] Ammonia
[B] Methane
[C] Helium
[D] Carbon dioxide

Show Answer

89. What is the PH of the human blood?

[A] Highly Basic
[B] Slightly Acidic
[C] Slightly Basic
[D] Highly Acidic

Show Answer

90. Which of the following is not an example of Allotrope?

[A] Steel
[B] Graphite
[C] Diamond
[D] Charcoal

Show Answer

Advertisement [contact-form-7 id="141158" title="Contact form 1"]