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Chemistry

Chemistry
Which one of the following is most electronegative

Carbon
Tin
Lead
Silicon

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Chemistry
0.01 mole of NaOH is added to 10 liters of water. The pH of water changes by

6
7
4
3

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Chemistry
Which of the following is caused by the higher concentration of Nitrogen and Phosphorous ?

Hardness
Alkalinity
Eutrophication
Acidity

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Chemistry
Cement containing excess amount of lime

Is quick setting
Becomes more strong
Cracks during setting
Is slow setting

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Chemistry
Which one of the following is found in Vinegar ?

Propionic acid
Acetic acid
Formic acid
Butyric acid

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Chemistry
Basicity of boric acid, H3BO3 is

4
2
5
3

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