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Hardness of Water and Treatment

Salt(s) which...

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Salt(s) which has acidic hydrogen, is (1) NaH_2PO_2 (2) Na_2HPO_3 (3) NaH_2PO_4 (4) All of these

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N a H_{2} P O_{2}

N a H P O_{3}

are acid salts.

State whether given statement is true or false:

N a_{2} H P O_{3}

N a H_{2} P O_{2}

N a H S O_{4}

salts as acid salt or normal salt.

Q. Question 7
Generally, metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals, except

Mn

Mg

H_{2} {SO}_{4}

HCl

{HNO}_{3}

(d) All of these

Q. Consider the following salts:
Na₂CO₃, NaCl, NH₄Cl, CH₃COONa, K₂SO₄, (NH₄)₂SO₄
Which of these salts will give:
(a) acidic solutions?
(b) neutral solutions?
(c) basic solutions (or alkaline solutions)?

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