The pH values of five solutions A, B, C, D and E are given below: Solution A B C D E p H 6 8 1 7 14 Which solution is: Neutral?

Solution with pH value 7 is neutral, and solution D is neutral in the given solutions because it contains equal amounts of hydrogen ions and hydroxide ions. The pH scale has values from 0 to 14. Neutral substances have a pH of exactly 7, acidic substances have pH 0-7 and basic substances have pH 7-14.

The pH values of five solutions A, B, C, D and E are given below: Solution A B C D E p H 6 8 1 7 14 Which solution is: Strongly alkaline?

Solution E is strongly alkaline because its pH value is 14. This means that the solution E contains a higher concentration of hydroxide ions. As pH increases basic(alkaline) nature increases. The pH scale has values from 0 to 14. pH ranges from 0-7 for acids and 7-14 for bases. Neutral substances have pH 7.

The pH values of five solutions A, B, C, D and E are given below: Solution A B C D E p H 6 8 1 7 14 Which solution is: Strongly acidic

Solution C is strongly acidic because it has a pH value of 1. This means that solution C contains a higher concentration of hydrogen ions. As pH value decreases acidic strength increases. The pH scale has values from 0 to 14. pH ranges from 0-7 for acids and 7-14 for bases. Neutral substances have pH 7.

The pH values of five solutions A, B, C, D and E are given below: Solution A B C D E p H 6 8 1 7 14 Which solution is: Weakly alkaline?

Solution B is weakly alkaline because it has a pH value of 8. This means that the solution B contains a lower concentration of hydroxide ions. As pH decreases, basic(alkaline) nature decreases. The pH scale has values from 0 to 14. pH ranges from 0-7 for acids and 7-14 for bases. Neutral substances have pH 7.

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Important Questions on Acids, Bases and Salts

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WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>EVALUATE>Q 5

Most plants grow the best in neutral conditions. What should be done if the soil becomes basic?

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WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>EVALUATE>Q 6

State the uses of sodium hydroxide and calcium hydroxide.

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WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>EVALUATE>Q 1

What will happen if the acidic wastewater from the industries is disposed off into rivers without treating it?

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WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>EVALUATE>Q 2

A tanker containing sulphuric acid met with an accident and the acid spilled on the road. Moreover, the iron drain covers on that road began melting and fizzing as the acid ran over them.

A chemist was called to check whether the acid actually leaked into the nearby river or not.

a) Suggest a method that the chemist must use to check if the river water contained any acid or not.

b) Name a better term that could be use in the place of 'Melting' in the above report.

c) What is the reason behind fizzing of iron drain covers when the acid ran over them?

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WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>EVALUATE>Q 3

The pH values of five solutions A, B, C, D and E are given below:

Solution	A	B	C	D	E
$p H$	$6$	$8$	$1$	$7$	$14$

Which solution is: Neutral?

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WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>EVALUATE>Q 3

The pH values of five solutions A, B, C, D and E are given below:

Solution	A	B	C	D	E
$p H$	$6$	$8$	$1$	$7$	$14$

Which solution is: Strongly alkaline?

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7th CBSE

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WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>EVALUATE>Q 3

The pH values of five solutions A, B, C, D and E are given below:

Solution	A	B	C	D	E
$p H$	$6$	$8$	$1$	$7$	$14$

Which solution is: Strongly acidic

MEDIUM

7th CBSE

IMPORTANT

WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 8 - Acids, Bases and Salts>EVALUATE>Q 3

The pH values of five solutions A, B, C, D and E are given below:

Solution	A	B	C	D	E
$p H$	$6$	$8$	$1$	$7$	$14$

Which solution is: Weakly alkaline?

Why is it wrong to treat a bee sting with vinegar?

Important Questions on Acids, Bases and Salts

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