Language of Chemistry Exe-1C Very Short Chemistry Class-9 ICSE Selina Publishers

Language of Chemistry Exe-1C Very Short Chemistry Class-9 ICSE Selina Publishers Solutions Chapter-1. Step By Step ICSE Selina Concise Solutions of Chapter-1 Language of Chemistry with All Exercise including MCQs, Very Short Answer Type, Short Answer Type, Long Answer Type, Numerical and Structured/Application Questions Solved . Visit official Website CISCE for detail information about ICSE Board Class-9.

Language of Chemistry Exe-1C Very Short Chemistry Class-9 ICSE Concise Selina Publishers

Board ICSE
Publications Selina Publication
Subject Chemistry
Class 9th
Chapter-1 Language of Chemistry
Book Name Concise
Topics Solution of Exercise – (1C) Very Short Answer Type
Academic Session 2023-2024

B. Exercise – (1C) Very Short Answer Type

Language of Chemistry Class-9 Chemistry Concise Solutions  

Page 19

Question 1.

Fill in the blanks:

(a) Dalton used symbol _____ for oxygen _____ for hydrogen.

(b)Symbol represents _____ atom(s) of an element.

(c)Symbolic expression for a molecule is called _____.  .

(d)Sodium chloride has two radicals. Sodium is a _____ radical while chloride is _____ radical.

(e)Valence of carbon in CH4 is _____, in C2H_____, in C2H4 ___ and in C2H2 is ____.

(f)Valence of Iron in FeCl2 is _____ and in FeCl3 it is ____.

(g)Formula of iron (ill) carbonate is _____.

Answer:

(a) Dalton used symbol [O] for oxygen,[H] for hydrogen.

(b) Symbol represents gram atom(s) of an element.

(c) Symbolic expression for a molecule is called molecular formula.

(d) Sodium chloride has two radicals. Sodium is a basic radical, while chloride is an acid radical.

(e) Valence of carbon in CH4 is 4, in C2H64, in C2H44 and in C2H2 is 4.

(f) Valence of iron in FeCl2 is 2 and in FeCl3 it is 3.

(g) Formula of iron (III) carbonate is Fe2 [CO3]3.


B. Exercise – (1C) Very Short Answer Type

Language of Chemistry Class-9 Chemistry Concise Solutions  

Page 20

Question 2.

Complete the following table.

Acid Radicals →
Basic Radicals ↓
Chloride Nitrate Sulphate Carbonate Hydroxide Phosphate
Magnesium MgCl2 Mg(NO3)2 MgSO4 MgCO3 Mg(OH)2 Mg3(PO4)2
Sodium
Zinc
Silver
Ammonium
Calcium
Iron (II)
Potassium

Answer:

The completed table is given below:

Acid Radicals →
Basic Radicals ↓
Chloride Nitrate Sulphate Carbonate Hydroxide Phosphate
Magnesium MgCl2 Mg(NO3)2 MgSO4 MgCO3 Mg(OH)2 Mg3(PO4)2
Sodium NaCl NaNO3 Na2SO4 Na2CO3 NaOH Na3PO4
Zinc ZnCl2 Zn(NO3)2 ZnSO4 ZnCO3 Zn(OH)2 Zn3(PO4)2
Silver AgCl AgNO3 Ag2SO4 Ag2CO3 AgOH Ag3PO4
Ammonium NH4Cl NH4NO3 (NH4)2SO4 (NH4)2CO3 NH4OH (NH4)3PO4
Calcium CaCl2 CaNO3 CaSO4 CaCO3 Ca(OH)2 Ca3(PO4)2
Iron (II) FeCl2 Fe(NO3)2 FeSO4 FeCO3 Fe(OH)2 Fe3(PO4)2
Potassium KCl KNO3 K2SO4 K2CO3 KOH K3PO4

Question 3.

Correct the following statements.

(a) A molecular formula represents an element.

(b) Molecular formula of water is H2O2.

(c) A molecule of sulphur is monoatomic.

(d) CO and Co both represent cobalt.

(e) Formula of iron (III) oxide is FeO.

Answer:

(a) A molecular formula represents the molecule of an element or of a compound.

(b) Molecular formula of water is H2O.

(c) A molecule of sulphur is octatomic.

(d) CO represents Carbon Monoxide and Co represents cobalt.

(e) Formula of iron (III) oxide is Fe2O3.

Question 4.

Give the empirical formula of :(a) Benzene (C6H6)(b) Glucose (C6H12O6)

(c) Acetylene (C2H2)

(d) Acetic acid (CH3COOH)

Answer:

(a) Ratio of C and H atoms in Benzene (C6H6) = 6 : 6
Simplest Ratio = 1 : 1
∴ Empirical formula of Benzene (C6H6) = CH

(b) Ratio of C, H and O atoms in Glucose (C6H12O6) = 6 : 12 : 6
Simplest Ratio = 1 : 2 : 1
∴ Empirical formula of Glucose (C6H12O6) = CH2O

(c) Ratio of C and H atoms in Acetylene (C2H2) = 2 : 2
Simplest Ratio = 1 : 1
∴ Empirical formula of Acetylene (C2H2) = CH

(d) Ratio of C, H and O atoms in Acetic acid (CH3COOH) = 2 : 4 : 2
Simplest Ratio = 1 : 2 : 1
∴ Empirical formula of Acetic acid (CH3COOH) = CH2O

—  : End of Language of Chemistry Exe-1C Very short Answer Class-9 ICSE Chemistry Solutions :–

Return to  Return to Concise Selina ICSE Chemistry Class-9 

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