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CLASS 10 Science (Biology) Chapter-7 How do Organism Reproduce | Important Questions

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Let’s Revise the Topics Covered under this Chapter ( How do Organism Reproduce): [For detailed Understanding, visit our NOTES by CLICK HERE ] 1. INTRODUCTION– Reproduction 2. TYPES OF REPRODUCTION 3. METHODS OF ASEXUAL REPRODUCTION 4. SEXUAL REPRODUCTION 5. SEXUAL REPRODUCTION IN PLANTS 6. SEXUAL REPRODUCTION IN HUMAN BEING 7. REPRODUCTIVE HEALTH 8. FEMALE […]

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

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Case Study Questions CASE STUDY 1 – Reaction of Metals with Acids When zinc granules are added to dilute hydrochloric acid in a test tube, effervescence occurs due to the formation of a gas. The gas burns with a pop sound. The reaction is exothermic, and zinc chloride is formed as a by-product.

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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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