Q2 (NDA-I/2015) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Applied everyday chemistry Answer Verified

Statement I : The granules of modem gunpowder (also called black powder) are typically coated with Graphite. Statement I : Graphite prevents the build-up of electrostatic charge.

Both the statements are individually true and Statement II is the correct explanation of Statement I

Both the statements are individually true but Statement II is not the correct explanation of Statement I

Statement I is true but Statement II is false

Statement I is false but Statement II is true

Result

Your answer: — · Correct: A

Explanation

Statement I is true as modern black powder granules are typically coated with graphite during the manufacturing process. This coating serves multiple purposes, including improving the flow of the powder and acting as a lubricant. Statement II is also true and provides the correct explanation for Statement I. Graphite is a form of carbon that conducts electricity. By coating the granules with a conductive material like graphite, manufacturers prevent the build-up of static electricity on the surface of the grains. This significantly reduces the risk of accidental ignition caused by electrostatic discharge during handling, transport, or pouring, which is a critical safety measure for low explosives like black powder.

Sources

[1] Science , class X (NCERT 2025 ed.) > Chapter 4: Carbon and its Compounds > Allotropes of carbon > p. 61
[2] Science , class X (NCERT 2025 ed.) > Chapter 3: Metals and Non-metals > Table 3.1 > p. 40

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Statement I : The granules of modem gunpowder (also called black powder) are typically coated with Graphite. Statement I : Graphite prevents the build-up of electrostatic charge.

Explanation

SIMILAR QUESTIONS

Which one among the following statements is not correct about graphite?

Which one of the following statements is not correct?

Assertion(A): Graphite is used as a lubricant in machine industry. Reason (R) : Graphite is soft and a good conductor of heat.

Statement I: Limestone decomposes when it is heated in air. Statement II: Increase in the content of C02 in the atmosphere in recent years is mainly due to the using of limestone in the manufacture of cement.

Statement I: Conversion of blue copper sulphate to black cupric oxide on heating is a physical change. Statement II : A change in which chemical composition does not change is called physical change.

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