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

Which chemical formula remains the formula of water throughout the hydrological cycle?

Answer and explanation

Correct answer: H₂O

Correct answer: B, H₂O. A water molecule contains two hydrogen atoms chemically bonded to one oxygen atom, so its formula is H₂O. During the hydrological cycle, water may evaporate into vapour, condense into droplets, freeze into ice, melt, or fall as precipitation. These are physical changes of state; the identity of the substance remains water. A, H₂O₂, is hydrogen peroxide and has two oxygen atoms, so it is a different compound. C, OH⁻, is the hydroxide ion, not a complete neutral water molecule. D, H₃O⁺, is the hydronium ion formed when a proton associates with water in an acidic solution. Memory cue: two H atoms plus one O atom gives H₂O; state changes do not change the formula.

Related tags

Water-FormulaH2OPhysical-ChangeHydrological-CycleHydrological CycleThe Living WorldBiologyClass 11 Mcq

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.