Chemistry: Solved 109 Chemistry Questions and answers section with explanation for various online exam preparation, various interviews, Logical Reasoning Category online test. Category Questions section with detailed description, explanation will help you to master the topic.

Chemistry Questions

1. What is the process of conversion from solid to gas is known as?




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Correct Ans:
Explanation:
The process of conversion from solid to gas is known as sublimation.

The process of conversion from liquid or gas to solid is known as solidification.

The process of conversion from liquid to gas is known as vaporization.

The process of conversion from gas or vapour to liquid is known as condensation.

Hence, option C is the correct answer.


2. The metallurgical process in which a metal is obtained in a fused state is called 




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Correct Ans:smelting
Explanation:


3. The most commonly used bleaching agent is : 




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Correct Ans:chlorine
Explanation:


4. The nuclear particles which are assumed to hold the nucleons together are




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Correct Ans:mesons
Explanation:


5. The oxide of Nitrogen used in medicine as anaesthetic is ?




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Correct Ans:Nitrogen pentoxide
Explanation:


6. The nuclear particles which are assumed to hold the nucleons together are




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Correct Ans:mesons
Explanation:


7. The most commonly used bleaching agent is : 




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Correct Ans:chlorine
Explanation:


8. The metalurgical process in which a metal is obtained in a fused state is called 




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Correct Ans:smelting
Explanation:


9. The oxide of Nitrogen used in medicine as anaesthetic is ?




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Correct Ans:Nitrogen pentoxide
Explanation:


10.

The term PVC used in the plastic industry stands for





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Correct Ans:polyvinyl chloride
Explanation:


11. All of the following are units of electrical measurements, except




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Correct Ans:Angstrom
Explanation:


12. Which of the following statements about the physical properties of metals is not correct?




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Correct Ans:They are not malleable
Explanation:


13. How many kinds of rays does radioactive elements emit?




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Correct Ans:Three
Explanation:


14. The osmotic pressure of a solution increases if




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Correct Ans:Number of molecules of solute is increased
Explanation:


15. Which of the following copper alloys is used for the manufacture of springs and suspension filaments in electrical instruments?




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Correct Ans:Phosphorus bronze
Explanation:


16. Which of the following copper alloys is used for the manufacture of resistance wire?




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Correct Ans:German silver
Explanation:


17. Semi-permeable membrane permits the flow of 




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Correct Ans:Solvent throught it
Explanation:
Semi-permeable membrane permits the flow ofSolvent throught it.


18. Which of the following metals has the lowest melting point?




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Correct Ans:Potassium
Explanation:


19. For the manufacture of cement, which of the following is used in the largest quantity?




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Correct Ans:Calcium oxide
Explanation:


20. The rate constant for a first order reaction depends on




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Correct Ans:Temperature
Explanation:





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