Update

Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है

Subjects
0 reads0 ratings0 helpful

In which example is the idea of a pure compound clearest?

Answer and explanation

Correct answer: Fixed composition of pure (HCl)

The direct answer is A, the fixed composition of pure HCl. A pure compound is a substance formed when different elements are chemically joined in a definite ratio. Its particles and chemical formula remain the same throughout the sample. Pure HCl contains hydrogen and chlorine chemically combined in a fixed composition, so it clearly illustrates a compound with definite composition. Option A is correct because it gives both the idea of purity and the idea of fixed composition. Option B, adding water to milk, is mixing substances; the amount of water can be changed, so it is a variable mixture, not a pure compound. Option C, soil, contains many substances such as minerals, sand, clay and organic matter in varying amounts; it is not one compound with one formula. Option D, sea water, contains water and dissolved salts whose amounts vary from place to place and after evaporation, so it is a mixture. The word pure is important, but it must be connected with a chemical formula and fixed composition. Remember: a compound has chemically combined elements and a fixed ratio; a mixture has physically combined substances and a variable ratio.

Related tags

ChemistryLawsCombination

Was this question useful?

No ratings yetWrite a review / Rate this question

Student Reviews

No published reviews yet.

Add Muft Shiksha to your Home Screen

In Safari, tap Share, then Add to Home Screen.