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Class 10 Science (Chemistry) Ch-2 Acid, Bases, and Salt | IMPORTANT QUESTIONS

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2 Marks Questions   Q1. What happens when an acid reacts with a metal carbonate? Write a balanced chemical equation. Approach: Recall gas evolved when acid reacts with carbonate. Answer: Acid + Metal Carbonate → Salt + Water + Carbon dioxide Example: ——————————————————————————————————- Q2. Define pH. What is the pH of pure water at 25°C? […]

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CLASS 10 Science (Chemistry) Ch-1 Chemical Reactions and Equation | Case Study Questions

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CASE STUDY (Experimental Based – 5 MARKS) Questions   Case Study 1: During a laboratory demonstration, a teacher heated lead nitrate crystals in a test tube. Brown fumes evolved, a yellow solid remained, and the gas turned moist litmus paper acidic. Answer the following: Q1. Identify the type of reaction. Answer: Thermal decomposition reaction. Q2.

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CLASS 10 Science (Chemistry) Ch-1 Chemical Reaction and Equation | Important Questions

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2 MARKS QUESTIONS   Q1. Why does the colour of copper sulphate solution change when an iron nail is dipped into it? Write the balanced chemical equation for this reaction. Approach: → Think about displacement based on reactivity series — which metal replaces which? Answer: Iron is more reactive than copper. Hence, it displaces copper

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CLASS 10 SCIENCE Chapter-10 Human Eye and Colourful world | Important questions and their Approach to answer

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Let’s Revise the Topics Covered under this Chapter-10 (Human Eye and Colourful world): [For detailed Understanding, visit our NOTES by CLICK HERE] 1. INTRODUCTION: HUMAN EYE 2. PARTS OF HUMAN EYE 3. HUMAN EYE WORK AS A CAMERA 4. NEAR POINT OR LEAST DISTANCE OF DISTINCT VISION 5. DEFECT OF VISION AND CORRECTION 6. ADVANTAGES

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