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Show the dissociation of the following compounds on dissolving in water, with the help of chemical equation and

asked Apr 13, 2022 in Chapter 5 Acids, Bases and Salts by Doubtly (98.9k points)

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Nita heard the sound of lightning after 4seconds of seeing it. What was the distance of lightning from her?

asked Apr 14, 2022 in Chapter 12 Study of Sound by Doubtly (98.9k points)

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In plane diffraction grating the angle of diffraction for the second order maximum for the wavelength 5000Ao is 30

asked Apr 10, 2022 in Engineering Physics 2 by Doubtly (98.9k points)

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Which day is observed as ‘World Meteorological Day’?

asked Apr 14, 2022 in Chapter 9 Environmental Management by Doubtly (98.9k points)

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What is meant by neutralization? Give two examples from everyday life of the neutralization reaction.

asked Apr 13, 2022 in Chapter 5 Acids, Bases and Salts by Doubtly (98.9k points)

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Explain with suitable examples, the relationship between weather forecasting and disaster management.

asked Apr 14, 2022 in Chapter 9 Environmental Management by Doubtly (98.9k points)

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Complete the following table (Carefully study the carbon, oxygen and nitrogen cycles)

asked Apr 14, 2022 in Chapter 7 Energy Flow in an Ecosystem by Doubtly (98.9k points)

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Write about artificial food colours, the substances used in them and their harmful effects.

asked Apr 14, 2022 in Chapter 14 Substances in Common Use by Doubtly (98.9k points)

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1 answer 230 views

Age of John’s father is three times the age of John. Five years ago, age of father was four times John’s age at that

asked Apr 9, 2022 in maths by sumedh patil (473 points)

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1 answer 142 views

write notes on Plastic waste.

asked Apr 14, 2022 in Chapter 9 Environmental Management by Doubtly (98.9k points)

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Match the proper terms from columns A and C with the description in column B.

asked Apr 13, 2022 in Chapter 6 Classification of Plants by Doubtly (98.9k points)

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Classify aqueous solutions of the following substances according to their pH into three groups : 7, more than 7, less

asked Apr 13, 2022 in Chapter 5 Acids, Bases and Salts by Doubtly (98.9k points)

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Classify the following oxides into three types and name the types. CaO, MgO, CO2 , SO3 , Na2O, ZnO, Al2O3 , Fe2O3

asked Apr 13, 2022 in Chapter 5 Acids, Bases and Salts by Doubtly (98.9k points)

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Zinc oxide was added to dilute HCl and zinc oxide was added to dilute NaOH.

asked Apr 13, 2022 in Chapter 5 Acids, Bases and Salts by Doubtly (98.9k points)

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Write briefly about the three methods of electrolysis of sodium chloride.

asked Apr 14, 2022 in Chapter 14 Substances in Common Use by Doubtly (98.9k points)

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Define antibiotics ?

asked Apr 14, 2022 in Chapter 8 Useful and Harmful Microbes by Doubtly (98.9k points)

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Explain in detail the inter-relationship between the food chain and food web.

asked Apr 14, 2022 in Chapter 7 Energy Flow in an Ecosystem by Doubtly (98.9k points)

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What is the important role of climate in our day to day life?

asked Apr 14, 2022 in Chapter 9 Environmental Management by Doubtly (98.9k points)

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1 answer 118 views

write note on Reflex action

asked Apr 14, 2022 in Chapter 15 Life Processes in Living Organisms by Doubtly (98.9k points)

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state the difference Negative electrode and positive electrode.

asked Apr 13, 2022 in Chapter 5 Acids, Bases and Salts by Doubtly (98.9k points)

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