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CBSE Class 10 Answered

name the sodium compound which is used for softening hard water
Asked by manjulasanthiya | 21 May, 2020, 18:54: PM
answered-by-expert Expert Answer
Sodium carbonate or washing soda (Na2CO3)
Answered by Ramandeep | 22 May, 2020, 21:47: PM

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CBSE 10 - Chemistry
which acid found in apple
Asked by aggrwalmontek | 14 Sep, 2023, 22:43: PM
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CBSE 10 - Chemistry
1.A farmer has grown the petunia flowers on his field. He observed that the colour of the flowers started changing from blue to reddish purple. • What could be the possible reason for the change in colour? ? What role is played by petunia flowers? • Suggest any two substances playing the same role in the field of agriculture. • What should be added by the farmer to treat the soil? What type of reaction will take place during treatment of soil? 2. A metal X reacts with HCI to liberate gas A but its compound Y releases gas B with HCI along with the salt CaCl,. Name the metal X. • Identify gas A and how will you test for it? ? Name the salt Y and give its molecular formula. • Identify gas B and how will you test for it? What type of reaction takes place when X reacts with HCI? 3. A sodium salt 'A' is used while baking a cake. It makes the cake fluffy and spongy due to the release of gas 'B'. Identify salt 'A'. ? What is the common name of this salt? ? Which gas is released during the process? • How will you test for gas 'B'? 4. Anita's mother asked her to store the pickle in some bowl. She kept the pickle in a brass bowl. Was she right in doing that? Why or why not?
Asked by 9414612ji | 19 Aug, 2022, 08:25: AM
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CBSE 10 - Chemistry
reaction of metallic oxides with acids
Asked by manisha.5154 | 15 Jun, 2022, 14:52: PM
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CBSE 10 - Chemistry
what precautions will take in experiment diluting acid
Asked by ranishoba947 | 10 May, 2022, 21:04: PM
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CBSE 10 - Chemistry
give a way to predict the parent acid and parent base of any salt, respond soon,
Asked by Trisha Gupta | 23 Nov, 2021, 00:29: AM
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CBSE 10 - Chemistry
Is potassium iodide aqueous
Asked by anshika.dubey9809 | 11 Nov, 2021, 19:42: PM
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CBSE 10 - Chemistry
what happens to acids and bases in water solutions
Asked by bhavikabhatia1125 | 10 Jul, 2021, 22:27: PM
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CBSE 10 - Chemistry
In the following questions (13-16), a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices. a) Assertion and reason both are correct statements and reason is correct explanation for assertion. b) Assertion and reason both are correct statements but reason is not correct explanation for assertion. c) Assertion is correct statement but reason is wrong statement. d) Assertion is wrong statement but reason is correct statement. a. Assertion: When zinc granules are added to dilute hydrochloric acid effervescence occurs. Reason: Formation of CO2 gas is the cause of effervescence.  
Asked by palakkothari46 | 22 Jun, 2021, 11:58: AM
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CBSE 10 - Chemistry
what are acid and base according to Arrhenius definition
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Asked by nitikakaliramana466 | 14 May, 2021, 09:37: AM
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CBSE 10 - Chemistry
10 ml of 0.01 M HCL is mixed with 40 ml of 0.01 M HCL. The pH of resulting solution is
Asked by ayan1.chatterjee | 07 May, 2021, 20:05: PM
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