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

If a colourless gas is evolved in a chemical reaction, is it correct to conclude that no reaction occurred solely because no colour change is seen?

Answer and explanation

Correct answer: No, because gas evolution, a temperature change, or precipitate formation can be other signs of a reaction.

A colour change is only one possible sign of a chemical reaction; it is not compulsory. Many gases, such as hydrogen and carbon dioxide, are colourless, yet bubbling or gas evolution can indicate that a reaction has occurred. Therefore, the absence of a visible colour change does not prove that no reaction took place. Option B is incorrect because not all gases are coloured, while option C is incorrect because temperature change and precipitate formation can also indicate a reaction.

Related tags

Class 10 ScienceChemical ReactionsChemical EquationsSigns Of ReactionColourless Gases

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.