Identify the types of reaction Reaction Type NH 4 OH aq + CH 3 COOH aq → CH 3 COONH 4 aq + H 2 O l Single displacement Zn s + CuSO 4 aq → ZnSO 4 aq + Cu s Combustion ZnCO 3 s → heat ZnO s + CO 2 g Neutralisation C 2 H 4 g + 4 O 2 g → 2 CO 2 g + 2 H 2 O g + Heat Thermal decomposition

The type of reaction in which an acid (acetic acid) reacts with a base (ammonium hydroxide) is known as neutralisation reaction. Salt (ammonium acetate) and water is formed. This reaction also liberates heat. NH 4 OH aq + CH 3 COOH aq → CH 3 COONH 4 aq + H 2 O l Neutralisation The type of reaction in which a reactive metal displaces less reactive metal from its salt solution is known as decomposition reaction. Here zinc is more reactive than copper. Therefore, zinc displaces copper from copper sulphate solution. Zn s + CuSO 4 aq → ZnSO 4 aq + Cu s Single displacement The type of reaction in which a compound decomposes into more than one product is known as decomposition reaction. Here heat is supplied for the reaction to proceed Hence, it is thermal decomposition reaction. This reaction can also be called as endothermic reaction. ZnCO 3 s → heat ZnO s + CO 2 g Thermal decomposition The type of reaction in which carbon substances burn in presence of oxygen is known as combustion reaction. During complete combustion carbon dioxide is formed, while during incomplete combustion carbon monoxide is formed. C 2 H 4 g + 4 O 2 g → 2 CO 2 g + 2 H 2 O g + Heat Combustion

Calculate the pH of 1 . 0 × 10 - 4 M solution of HNO 3 ?

Concentration of H + = 1 . 0 × 10 - 4 M pH of HNO 3 can be found from the relation, pH = - log H + = - log 1 . 0 × 10 - 4 = - log 10 - 4 = - - 4 log 10 = - 4 × - 1 = 4

What is the pH of 1 . 0 × 10 - 5 M solution of KOH ?

KOH is a strong base. It dissociates as, KOH → K + + OH - One mole of potassium hydroxide gives one mole of OH - ions. pOH = - log OH - = - log 1 . 0 × 10 - 5 = - log 10 - 5 = - 5 - log 10 = - 5 - 1 = 5 pH + pOH = 14 pH = 14 - 5 = 9

The hydroxide ion concentration of a solution is 1 × 10 - 11 M . What is the pH of the solution?

The concentration of one mole of hydroxide is 1 × 10 - 11 M . pOH = - log OH - = - log 1 . 0 × 10 - 11 = - log 10 - 11 = - 11 - log 10 = - 11 - 1 = 11 pH + pOH = 14 pH = 14 - 11 = 4

E M B I B E

Science Standard 10>Chapter 10 - Types of Chemical Reactions>TEXTBOOK EVALUATION

Tamil Nadu Board Solutions for Chapter: Types of Chemical Reactions, Exercise 2: TEXTBOOK EVALUATION

Author:Tamil Nadu Board

Tamil Nadu Board Science Solutions for Exercise - Tamil Nadu Board Solutions for Chapter: Types of Chemical Reactions, Exercise 2: TEXTBOOK EVALUATION

Attempt the practice questions on Chapter 10: Types of Chemical Reactions, Exercise 2: TEXTBOOK EVALUATION with hints and solutions to strengthen your understanding. Science Standard 10 solutions are prepared by Experienced Embibe Experts.

Questions from Tamil Nadu Board Solutions for Chapter: Types of Chemical Reactions, Exercise 2: TEXTBOOK EVALUATION with Hints & Solutions

HARD

10th Tamil Nadu Board

IMPORTANT

Science Standard 10>Chapter 10 - Types of Chemical Reactions>TEXTBOOK EVALUATION>Q 5

Which of the following statements are correct about chemical equilibrium?

i. It is dynamic in nature

ii. The rate of forward and backward reactions are equal

iii. Irreversible reactions do not attain chemical equilibrium

iv. The concentrations of reactants and products may be different

HARD

10th Tamil Nadu Board

IMPORTANT

Science Standard 10>Chapter 10 - Types of Chemical Reactions>TEXTBOOK EVALUATION>Q 1

Identify the types of reaction

Reaction	Type
${NH}_{4} {OH}_{(aq)} + {CH}_{3} {COOH}_{(aq)} \to {CH}_{3} {COONH}_{4 (aq)} + H_{2} O_{(l)}$	Single displacement
${Zn}_{(s)} + {CuSO}_{4 (aq)} \to {ZnSO}_{4 (aq)} + {Cu}_{(s)}$	Combustion
${ZnCO}_{3 (s)} \overset{heat}{\to} {ZnO}_{(s)} + {CO}_{2 (g)}$	Neutralisation
$C_{2} H_{4 (g)} + 4 O_{2 (g)} \to 2 {CO}_{2 (g)} + 2 H_{2} O_{(g)} + Heat$	Thermal decomposition

HARD

10th Tamil Nadu Board

IMPORTANT

Science Standard 10>Chapter 10 - Types of Chemical Reactions>TEXTBOOK EVALUATION>Q 1

A solid compound $' A'$ decomposes on heating into $' B'$ and gas $' C'$ . On passing the gas $' C'$ through water, it becomes acidic. Identify $A, B$ and $C$ .