NCERT (Chemistry) Class-VII
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| ChemistryDate Added: 2022-05-20 Which of the following are correctly matched? 1. Dissolution------solute gets dissolved in a solvent. 2. Exothermic------------- heat in absorbed. 3. Reversible change------reactants can be obtained. Which of the above are correct? | ||
| ChemistryDate Added: 2022-05-20 Which of the following is correct for a physical change? 1. Only physical properties change. 2. Large amount of heat is absorbed or evolved. Which of the above statements is/are correct? | ||
| ChemistryDate Added: 2022-05-20 Which of the following is not a chemical change? | ||
| ChemistryDate Added: 2022-05-20 Rusting of iron can be prevented by: 1. Painting 2. Galvanisation 3. Electrolytic refining 4. Alloying Which of the above are correct? | ||
| ChemistryDate Added: 2022-05-20 Which of the following is/are correct for crystallisation? 1. It is a physical change. 2. It is used to obtain pure substance. Which of the above statements is/are correct? | ||
| ChemistryDate Added: 2022-05-20 Which of the following is/are correct for weather? 1. Its changes over a long period. 2. Temperature, humidity, rainfall are elements of weather. 3. Study of weather is called meteorology Which of the above statements are correct? | ||
| ChemistryDate Added: 2022-05-20 Which of the following is/are benefits of weather forecasting? 1. It allows people to prepare for bad weather. 2. It helps in the planning of daily activities. Which of the above statements is/are correct? | ||
| ChemistryDate Added: 2022-05-20 Which of the following is/are correct for climate? 1. Variations that occur on day-to-day basis. 2. It is the average weather condition. 3. Climate chart is annual record of average temperature and rainfall. Which of the above statements is/are correct? | ||
| ChemistryDate Added: 2022-05-20 Which of the geographical factors affect climate? 1. Distance from sea 2. Direction of prevailing wind 3. Mountains 4. Distance from equator. Which of the above statements are correct? | ||
| ChemistryDate Added: 2022-05-20 Which of the following is/are correct for adaptation? 1. It is a tendency of an organism to develop certain features. 2. Permanent adaptation is inherited. Which of the above statements is/are correct? | ||
| ChemistryDate Added: 2022-05-20 Which of the following are correctly matched? 1. Penguin-------polar region. 2. Arboreal------animals live on tress. 3. Monkey- ----------tropical forest | ||
| ChemistryDate Added: 2022-05-20 Which of the following are correctly matched? 1. Troposphere----------clouds, rain. 2. Stratosphere----------ozone layer. 3. Mesosphere---------temperature increases with altitude. | ||
| ChemistryDate Added: 2022-05-20 Which of the following is/are correct about atmospheric pressure? 1. Pressure exerted by air on the earth. 2. It creates winds. 3. It does not influence weather Which of the above statements are correct? | ||
| ChemistryDate Added: 2022-05-20 Which of the following factors is/are not affected by speed and direction of wind? | ||
| ChemistryDate Added: 2022-05-20 What is/are the conditions required for the formation of thunderstorm? 1. Moisture 2. Rapidly rising warm air 3. Sea breeze or mountains. Which of the above statements are correct? | ||
| ChemistryDate Added: 2022-05-20 Which of the following is/are correct for cyclones? 1. They are low-pressure systems with high speed winds. 2. The wind speed is anticlockwise in Southern Hemisphere. 3. Tropical cyclones are more powerful than temperate cyclones. Which of the above statements is/are correct? | ||