Most Important Questions and Answers of Chapter 2 In Class 10 CBSE Science Question 1. With the help of an example explain what happens when a base reacts with a non- metallic oxide. What do you infer about the nature of non-metal oxide? (Board Term I, 2017) Answer: Oxides of non-metals react with bases to form salt and water. For example, the reaction between carbon dioxide and calcium hydroxide. Calcium hydroxide, which is a base, reacts with carbon dioxide to produce salt and water. Hence, oxides of non-metals are acidic in nature. Question 2. What is observed when carbon dioxide gas is passed through lime water (i) for a short duration? (ii) for a long duration? Also write the chemical equations for the reactions involved. (Board Term I, 2016) Answer: (i) When CO 2 is passed through lime water for short interval of time, it turns milky due to the formation of insoluble calcium carbonate. (ii) If CO 2 is passed for long duration through lime water, the white precipitate formed di
1. (a) You are quite cynical/ (b) when you say that the reason why we have/ (c) such a large turnout is because we are serving refreshments./ (d) No error. 2.(a) That store/ (b) hadn’t hardly/ (c) any of those goods./ (d) No error. 3. (a) I needed that money/ (b) so desperately, it was/ (c) like manna from heaven when it arrived./ (d) No error. 4. (a) The period/ (b) between 1980 to 1990/ (c) was very significant in my life./ (d) No error 5. (a) No sooner had the hockey match started/ (b) when it began/ (c) to rain./ (d) No error. 6. (a) She is very/ (b) beautiful/ (c) but intelligent./ (d) No error. 7. (a) Your success in the IAS examinations depends not only on/ (b) what papers you have selected/ (c) but on how you have written them/ (d) No error. 8. (a) No sooner had/ (b) he arrived then/ (c) he was asked to leave again./ (d) No error. 9. (a) I haven’t been/ (b) to New York before and/ (c) neither my sister./ (d) No error. 10. (a) Scarcely had/ (b) I arrived than/ (c)
The Harappan Civilisation Class 9 - Total History & Civics Solutions Multiple Choice Questions Question 1 The period when man used both stone and copper tools is known as: Bronze Age Period Chalcolithic Period Mesopotamian Civilisation Period Egyptial Period Answer Chalcolithic Period Question 2 Name the term archaeologists use for a group of objects distinctive in style, usually found together within a specific geographic area and period of time. Civilisation Culture Period History Answer Culture Question 3 Which of the following insights about the Harappan Civilisation was provided by the citadel? There were public buildings for specific purposes. There was ceremonial bathing. There was overseas trade. The people were literate. Answer There were public buildings for specific purposes. Question 4 Which of the following is NOT a feature of the Dockyard? World's oldest dockyard Presence of mud brick platform Surrounded by wall of baked bricks Connected by channels to
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