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class 9 chemistry chapter 1 extra questions

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Define density and give its SI unit. (c) What is its boiling point? Question 6. Students who are looking for some extra preparation are to inform that they can find 9th class Chemistry long questions as well. Why do solids have a regular geometrical shape? Answer: Question 1. Which of the following (shown in figure given below) would correctly represent the result? Comment. Answer: This makes the place cool and comfortable. (a) What will be the nature of this element? How is the latent heat of fusion related to the energy exchange that takes place during this change of state? On further heating, the temperature of the water would increase. Draw the arrangement of particles of position ‘X’ and ‘Y’ when the lamp is burning. Class 9 Science Important Questions Chapter 1 – Matter In Our Surroundings Explain these observations. Question 13. Answer: Answer: Describe an activity to determine the boiling point of water and melting point of ice. When a crystal of potassium permanganate is placed in a beaker containing water, its purple colour spreads throughout the water. (i) Liquid state, Wind speed: The rate of evaporation increases with increase in wind speed. ‘A small volume of water in a kettle can fill a kitchen with steam’. (c) A sponge has minute holes in which air is trapped. Important Questions For Class 9 Science Chapter 1 Matter In Our Surroundings are given here. We have provided The Solid State Class 12 Chemistry MCQs Questions with Answers to help students understand the concept very well. Question 5. (a) Name the changes in the terms of process P, Q, R and S? Since ice and water are in equilibrium, the temperature would be zero. Conditions that can increase the rate of evaporation of water are: Question 10. Question 5. (d) A1B1 and D1D2 Question 4. When 50 g of sugar is dissolved in 100 mL of water, there is no increase in volume. (a) What is the physical state of the substance at the points A, B, C and D? Question 12. Answer: Latent heat of evaporation of two liquids A and B is 100 J/kg and 150 J/kg respectively. Arrange the temperatures, TA, TBand TC of water in the three vessels in increasing order. MCQ Questions for Class 12 Chemistry with Answers were prepared based on the latest exam pattern. Molecular motion decreases as water gets converted into ice. What do you understand by the term ‘latent heat of fusion’? (d) Which portions of the graph indicates that change of state is taking place? Yes, it is a solid. Q1: Fill in the blank. These questions are helpful for school tests as well as terminal exams. Hence, wet clothes dry quickly in the sun. In a beaker take some water and insert a thermometer in it with the help of a clamp. So, if the air is already rich in water vapour, it will not take up more water; therefore, rate of evaporation of water will decrease. [NCERT Exemplar] (ii) Gaseous state. Suddenly she felt intense heat from the puff of steam gushing out of the spout of the kettle. Why do we feel comfortable under a fan when we are perspiring? (b) What is the melting point of the substance? Rate of evaporation increases if wind speed increases. And in order to cover 100% paper, MCQS or objective type part is left behind. and name the process involved. Is the water pure? Question 4. Also the material is not rigid. Answer: (ii) Particles just move around randomly because of very weak force of attraction. In which of the following, the particles have highest forces of attraction? Answer: (a). Answer: Temperature: The rate of evaporation increases with increase in temperature. (a) State the change(s) observed between 2-3 min. Explain how the rate of evaporation of a liquid is affected with: Question 9. Question 8. (C). Region C. Question 1. Here we have provided the chapter wise CBSE important questions for Class 9 Science.

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