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Give example Trivalent basic radicals

asked Apr 11, 2022 in Chapter 4 Measurement of Matter by Doubtly (98.9k points)

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The sum of two numbers is 60. The greater number is 8 more than thrice the smaller number. Find the numbers.

asked Mar 8, 2022 in Chapter1:Linear Equations in Two Variables by std 10th Student

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1 answer 193 views

Dilute HCl was added to limestone.

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

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1 answer 214 views

Where and why sound absorbing materials are used?

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

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What are broad spectrum antibiotics?

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

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Explain the trend of the following in group 13 elements : A. atomic radii B. ionization enthalpy C. electron affinity

asked Apr 13, 2022 in Chapter 9: Elements of Group 13, 14 and 15 by Doubtly (98.9k points)

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1 answer 261 views

The following figure shows the symbols for components used in the accompanying electrical circuit.

asked Apr 11, 2022 in Chapter 3 Current Electricity by Doubtly (98.9k points)

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Explain the trend in oxidation state of elements from nitrogen to bismuth.

asked Apr 13, 2022 in Chapter 9: Elements of Group 13, 14 and 15 by Doubtly (98.9k points)

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1 answer 190 views

Fill in the blanks to complete the statements. Justify the statements.

asked Apr 14, 2022 in Chapter 10 Information Communication Technology (ICT) by Doubtly (98.9k points)

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1 answer 221 views

Ga3+ salts are better reducing agent while Tl3+ salts are better oxidising agent.

asked Apr 13, 2022 in Chapter 9: Elements of Group 13, 14 and 15 by Doubtly (98.9k points)

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1 answer 184 views

write notes on Climatic factors.

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

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1 answer 285 views

An Apple a day keeps the Doctor away.

asked Apr 9, 2022 in Expansion of Idea by Doubtly (98.9k points)

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Magnesium oxide was added to dilute HCl and magnesium oxide was a added to dilute NaOH.

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

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If we hold a page of a book in front of a mirror, we see laterally inverted letters in the mirror. Why does it happen?

asked Apr 14, 2022 in Chapter 11 Reflection of Light by Doubtly (98.9k points)

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1 answer 418 views

Write down the concentration of each of the following solutions in g/L and mol/L. 2) 2g NaOH in 50 mL solution

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

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1 answer 191 views

write uses of Ceramic

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

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What should be the dimensions and the shape of classrooms so that no echo can be produced there?

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

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Fill in the blanks .

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

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Deduce the number of molecules of the following compounds in the given quantities. (i) 32g oxygen, (ii) 90g water

asked Apr 11, 2022 in Chapter 4 Measurement of Matter by Doubtly (98.9k points)

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1 answer 191 views

A convex mirror has a focal length of 18cm. The image of an object kept in front of the mirror is half the height of

asked Apr 14, 2022 in Chapter 11 Reflection of Light by Doubtly (98.9k points)

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