General Science Chemistry Questions and Answers

General Science Chemistry MCQ Quiz – Objective General Knowledge (GK) Question with Answer

Latest General Science Chemistry MCQs Objective Questions

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Q1. Which of the following is part of the chalcogen group in the modern periodic table?

[A] Lead
[B] Boron
[C] Oxygen
[D] Tin

Answer: [C] Oxygen

Q2. Thin wires can be drawn from a piece of metal. What property of the metal is it responsible for?

[A] Malleability
[B] Conductivity
[C] Hardness
[D] Ductility

Answer: [D] Ductility

Q3. How many elements are there in the modern periodic table?

[A] 118
[B] 120
[C] 124
[D] 130

Answer: [A] 118

Q4. When Sulphur is heated with rubber, the process is commonly known as?

[A] Vulcanization
[B] Hydrodesulfurization
[C] Sulphonation
[D] Galvanization

Answer: [A] Vulcanization

Q5. Which of the following is produced when wood is burned with a limited amount of oxygen?

[A] Paraffin
[B] Charcoal
[C] Petroleum
[D] Water gas

Answer: [B] Charcoal

Q6. What is the mass of one mole of the substance in grams?

[A] Molar mass
[B] Nuclear mass
[C] Molecular mass
[D] Atomic mass

Answer: [C] Molecular mass

Q7. The chemical name of washing soda is:

[A] Sodium carbonate
[B] Sodium hydroxide
[C] Sodium chloride
[D] Sodium hydrogen carbonate

Answer: [A] Sodium carbonate

Q8. Referring to radioactivity, which of the following is called an isomeric transition?

[A] Gamma emission
[B] Beta emission
[C] Alpha emission
[D] X-ray emission

Answer: [A] Gamma emission

Q9. The electron configuration of an atom with atomic number “20” is?

[A] 2, 2, 8, 8
[B] 2, 8, 8, 2
[C] 2, 10, 8
[D] 2, 6, 8, 4

Answer: [B] 2, 8, 8, 2

Q10. What is the ratio of pure gold to 18-carat gold?

[A] 65%
[B] 71%
[C] 75%
[D] 78%

Answer: [C] 75%

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