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

Of two colourless solutions, the first gives a gas with magnesium and the second turns red litmus blue. What is the correct identification?

Answer and explanation

Correct answer: The first is acidic and the second is basic

The governing concept is the use of characteristic tests for acids and bases. Magnesium is above hydrogen in the reactivity series and reacts with an acid to release hydrogen gas, for example: Mg + 2HCl → MgCl₂ + H₂. Separately, a solution that changes red litmus to blue is basic. Therefore the first solution is acidic and the second is basic, so option A is correct; the other choices reverse or ignore these observations.

Related tags

Acid Base IdentificationMagnesiumLitmusAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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.