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Standard XII

Chemistry

Nature of Oxides

Which one of ...

Question

Which one of the following acids is not strong?

H C l

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H B r

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H N O_{3}

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H_{3} P O_{4}

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Solution

The correct option is B $H_{3} P O_{4}$
The six strong acids are $H C l, H B r, H I, H N O_{3}, H C l O_{4},$ and $H_{2} S O_{4}$ . Phosphoric acid, $H_{3} P O_{4}$ , is a weak acid.

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Similar questions

Q. What is meant by strong acids and weak acids? Classify the following into strong acids and weak acids:

HCl, {CH}_{3} COOH, H_{2} {SO}_{4}, {HNO}_{3}, H_{2} {CO}_{3}, H_{2} {SO}_{3}

1 mole of how many of the following acids neutralize exactly one mole of NaOH, under required favorable conditions? $H C l, H N O_{3}, H_{2} S O_{4}, H_{2} S O_{3}, H_{3} P O_{4}, H_{3} P O_{3}, H_{3} P O_{2}, H_{4} P_{2} O_{5}, H_{3} B O_{3}$ ___

Q. Assertion :Heat of neutralisation of

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and

N a O H

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are strong acids and

N a O H

and

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are strong bases.

Q. Assertion :It is difficult to distinguish the strengths of the strong acids such as

H C l

H_{2} S O_{4}, H N O_{3}

H B r

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H C l O_{4}

in dilute aqueous solutions. Reason: In dilute aqueous solution all strong acids donate a proton to water and are essentially

100

% ionised to produce a solution containing

H_{3} O^{+}

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Which one of the following acids is not strong?

The correct option is B H3PO4The six strong acids are HCl, HBr, HI, HNO3, HClO4, and H2SO4. Phosphoric acid, H3PO4, is a weak acid.

The correct option is B $H_{3} P O_{4}$
The six strong acids are $H C l, H B r, H I, H N O_{3}, H C l O_{4},$ and $H_{2} S O_{4}$ . Phosphoric acid, $H_{3} P O_{4}$ , is a weak acid.