Chemistry MCQs

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

1. What characteristic of silica gel, a granular form of silica produced from sodium silicate, enables it to control humidity and prevent spoilage or degradation when packaged with various products?
[A] Its high thermal conductivity
[B] Its hygroscopic properties
[C] Its high reflectivity
[D] Its low thermal conductivity

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2. Which among the following is most advantageous in storage in fuel cells used in small, portable electronics such as phones and laptop computers?
[A] Methanol
[B] Hydrogen
[C] Formic Acid
[D] Acetic Acid

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3. Who correctly discovered or calculated for subatomic particles?
[A] John Dalton discovered electrons
[B] James Chadwick discovered protons
[C] Rutherford calculated charge to mass ratio of electrons
[D] None of the above

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4. What is the difference between the mass number of Parent nucleus and Daughter nucleus in an alpha-decay process?
[A] 2
[B] 4
[C] 6
[D] 8

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5. What do we call the reaction when an acid and a base react together to form salt and water?
[A] Reduction Reaction
[B] Oxidation Reaction
[C] Neutralisation Reaction
[D] Combination Reaction

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6. From which element in the modern periodic table, the 3d transition series starts?
[A] Zinc
[B] Iron
[C] Scandium
[D] Copper

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7. What is the pH of water in the Acid rain?
[A] More than 12
[B] Less than 5.5
[C] Between 7 and 11
[D] None of the above

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8. Which of these alkanes has higher boiling point?
[A] Butane
[B] Methane
[C] Ethane
[D] Hexane

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9. Which is the first member of Alkyne series?
[A] Methyne
[B] Acetylene
[C] Propyne
[D] Ethene

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10. Which of the following non-metals is a bright yellow crystalline solid at room temperature?
[A] Selenium
[B] Sulphur
[C] Carbon
[D] Iodine

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