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The rusting of metal iron in air needs:

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Important Questions on Chemistry

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General Science for Competitive Exams>Chapter 2 - Chemistry>MCQs>Q 445
The arsenic problem in India is primarily due to _____.
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General Science for Competitive Exams>Chapter 2 - Chemistry>MCQs>Q 447
Which of the following is used in the carbon electrodes:
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General Science for Competitive Exams>Chapter 2 - Chemistry>MCQs>Q 450
Which of the following is not a noble gas?
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General Science for Competitive Exams>Chapter 2 - Chemistry>MCQs>Q 452
In the periodic table of elements, on moving from left to right across a period, the atomic radius:
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General Science for Competitive Exams>Chapter 2 - Chemistry>MCQs>Q 453
What is the amount of Sulphur in vulcanized rubber?
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IMPORTANT
General Science for Competitive Exams>Chapter 2 - Chemistry>MCQs>Q 454
Which of the following is a metallic ore ?
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IMPORTANT
General Science for Competitive Exams>Chapter 2 - Chemistry>MCQs>Q 458
pH scale ranges:
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IMPORTANT
General Science for Competitive Exams>Chapter 2 - Chemistry>MCQs>Q 460
Iron rusts quickly in: