Classify the following substances as acidic, basic and neutral.

HCl, NaCl, MgO, KCl, CaO, H₂SO₄, HNO₃, H₂O, Na₂CO₃

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Solution

Acidic substance: H₂SO₄, HNO₃, HCl, MgO, CaO

Basic substances: H₂O, Na₂CO₃

Neutral substances: NaCl and KCl

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Classify following substances into acidic, basic and neutral group -

$H C l, N a C l, M g O, K C l, C a O, H 2 S O_{4}, H N O_{3}, H_{2} O, N a_{2} C O_{3} .$

Find the odd-man-out.

(a) HNO₃, H₂SO₄, HCl, Na₂CO₃

(b) MgO, CaO, H₂O, Na₂O

(d) NaCl, C₁₂H₂₂O₁₁, KCl, CuSO₄

(e) HCl, H₂SO₄, HNO₃, CH₃COOH

C a O

M g O

C O_{2}

S O_{3}

N a_{2} O

Z n O

A l_{2} O_{3}

F e_{2} O_{3}

In the following series of reactions

$N a C l + A \to B + H C l$ , $B + c o k e \to N a_{2} S + C O$

$N a_{2} S + C \to N a_{2} C O_{3} + C a S A$ , $B$ and $C$ are respectively

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