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

61. Which of the following quantum numbers is represented by a period of the modern periodic table?

[A] Principal quantum number
[B] Azimuthal quantum number
[C] Magnetic quantum number
[D] None of the above

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62. Which of these elements do not belong to the same group?

[A] Nickel
[B] Platinum
[C] Darmstadtium
[D] Roentgenium

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63. What is the molecular geometry of HgCl2?

[A] Linear
[B] Trigonal Planar
[C] Tetrahedral
[D] Octahedral

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64. What do the dots represent in the Lewis dot structures?

[A] positrons
[B] electrons
[C] atoms
[D] neutrons

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65. What is the bond formed due to the electrostatic attraction known as?

[A] Covalent bond
[B] Electrovalent bond
[C] Electromagnetic bond
[D] Polar bond

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66. Choose the correct statement:

[A] When acids and bases react, salt is formed
[B] Reaction between an acid and a base is known as a neutralisation reaction
[C] Both a and b
[D] None

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67. What can be the probable pH of Milk of Magnesia?

[A] 2
[B] 5.5
[C] 7
[D] 10.5

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68. Choose the incorrect acid-source pair?

[A] Citric acid – Lemon
[B] Lactic acid – Sour milk
[C] Oxalic acid – Ant sting
[D] Methanoic acid – Nettle sting

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69. What is the chemical name of Bleaching powder?

[A] Calcium Oxychloride
[B] Calcium Monosulphate
[C] Calcium Tetrachloride
[D] Sodium chloride

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70. Choose the correct about Phenolphthalein as an indicator?

[A] It turns red in acids and yellow in bases
[B] It turns colourless in acids and pink in bases
[C] It turns orange in acids and brown in bases
[D] It turns colourless in acids and green in bases

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