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Welcome to Doubtify – Your JEE Companion!
At Doubtify, we help JEE aspirants overcome doubts quickly through clear, step-by-step video solutions, PYQs, and chapterwise practice problems. Whether you're preparing for JEE Mains or Advanced, we've got you covered with accurate explanations that save your time and boost your confidence.

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๐Ÿ“ Based in India | ๐ŸŽฏ Target: JEE 2026 | ๐Ÿ’ป Platform: YouTube, Website & App

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Speed Reduced by 20%, Reaches 16 Minutes Late – Find Actual Time | Motion in Straight Line – JEE Question

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  ๐ŸงชMotion in a Straight Line  | Physics |  JEE Mains ❓ Question: A person goes to his office from his home daily at a fixed speed. But today he decided to reduce his speed by 20%, and as a result, he reaches his office 16 minutes late. What's the actual/original time he takes to reach his office daily? ๐Ÿ–ผ️ Question Image: ๐Ÿง  Solution (Image): ๐ŸŽฅ Video Solution: ๐Ÿ” Why this Question is Important: This is a frequently asked conceptual problem in  Kinematics  that tests your understanding of the relationship between speed, time, and distance. It’s a perfect example of how real-life reasoning can be applied to JEE Physics problems — and a favorite in  JEE Mains  question banks. ๐Ÿ“ฉ Have a Doubt? Drop us a mail at  doubtifyqueries@gmail.com  or DM us on  Instagram . Stay consistent. Watch – Pause – Solve – Repeat. Team Doubtify is with you till the finish line! ๐Ÿ’ช
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Balance the ionic equation in an alkaline medium: Cr(OH)₃ + IO₃⁻ → I⁻ + CrO₄²⁻

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  ๐Ÿงช Balance the Ionic Equation in Alkaline Medium: Cr(OH)₃ + IO₃⁻ → I⁻ + CrO₄²⁻ | Doubtify JEE ๐Ÿ“Œ Question: Balance the following ionic equation in alkaline medium : Cr(OH)₃ + IO₃⁻ → I⁻ + CrO₄²⁻ ๐Ÿ–ผ️ Question Image: ๐Ÿง  Solution (Image): ๐ŸŽฅ Video Solution: ๐Ÿ” Why this Question is Important: This is a frequently asked question from Redox Reactions , commonly seen in JEE Mains and Advanced exams. Knowing how to balance redox reactions in alkaline medium is a core skill every aspirant must master. ๐Ÿ“ฉ Have a Doubt? Drop us a mail at doubtifyqueries@gmail.com or DM us on Instagram . Stay consistent. Watch – Pause – Solve – Repeat. Team Doubtify is with you till the finish line! ๐Ÿ’ช
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Molality of NaOH Solution Given Density – JEE Chemistry | Doubtify JEE

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     ๐Ÿงฒ Solutions  | Chemistry  |  Doubtify JEE ๐Ÿงฎ Question: The density of the NaOH solution is 1.2 g/cm³. What is the molality of the solution? ๐Ÿ–ผ️ Question Image: ⚗️ Concept Overview: This is a fundamental problem from the Solutions chapter of Physical Chemistry. It tests your understanding of molality , density , and the method of converting between different concentration units. In many JEE Main and Advanced problems, students get confused between molality (mol/kg) and molarity (mol/L) . This problem helps to eliminate that confusion and improve conceptual clarity. ๐Ÿง  Step-by-Step Explanation: Let’s assume we are working with 1000 cm³ = 1 L of NaOH solution. Density = 1.2 g/cm³ So, total mass of 1 L solution = 1.2   g/cm³ × 1000   cm³ = 1200   g 1.2 \, \text{g/cm³} \times 1000 \, \text{cm³} = 1200 \, \text{g} Let’s say the solution is x% NaOH by mass (you may be given the percentage or molarity in the full version of the question – for no...
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