Match the following:- Column I Column II (Elements) (Symbol) (i) Fluorine Sc (ii) Sodium C (iii) carbon Xe (iv) Sulphur Hg (v) Xenon Cu (vi) Lead F (vii) Mercury Ti (viii) Copper Pb (ix) Titanium S (x) Scandium Na

An Element is a pure substance which cannot be broken down by chemical means, consisting of atoms which have identical numbers of protons in their atomic nuclei. Symbol is the short notation of the elements. The symbol of Flourine is F . The symbol of Sodium is Na The symbol of Carbon is C The symbol of Sulpher is S The symbol of Xenon is Xe The symbol of Lead is Pb The symbol of Mercury is Hg The symbol of Copper is Cu The symbol of Titanium is Ti The symbol of Scandium is Sc Column I Column II (Elements) (Symbol) (i) Fluorine F (ii) Sodium Na (iii) carbon C (iv) Sulpher S (v) Xenon Xe (vi) Lead Pb (vii) Mercury Hg (viii) Copper Cu (ix) Titanium Ti (x) Scandium Sc

Match the following: Name of the compounds Formulae (i) Sodium hypochlorite (a) Na 2 SO 4 (ii) Sodium zincate (b) Na 2 CO 3 (iii) Sodium bicarbonate (c) NaClO 3 (iv) Sodium silicate (d) NaNO 2 (v) Sodium bisulfate (e) Na 2 SiO 3 (vi) Sodium nitrite (f) Na 2 ZnO 2 (vii) Sodium nitrate (g) NaClO (viii) Sodium sulfate (h) NaHCO 3 (ix) Sodium chlorate (i) NaHSO 4 (x) Sodium carbonate (j) NaNO 3

Chemical formula is defined as the symbolic representation of a molecule of an element or a compound. It gives the exact number of the atoms present in a molecule of an element or a compound. It represents the actual mass of the substance used. Chemical formula of sodium hypochlorite= NaClO Chemical formula of sodium zincate= Na 2 ZnO 2 Chemical formula of sodium bicarbonate= NaHCO 3 Chemical formula of sodium silicate= Na 2 SiO 3 Chemical formula of sodium bisulfate= NaHSO 4 Chemical formula of sodium nitrite= NaNO 2 Chemical formula of sodium nitrate= NaNO 3 Chemical formula of sodium sulfate= Na 2 SO 4 Chemical formula of sodium chlorate= NaClO 3 Chemical formula of sodium carbonate= Na 2 CO 3 Name of the compound Formulae Sodium hypochlorite NaClO Sodium zincate Na 2 ZnO 2 Sodium bicarbonate NaHCO 3 Sodium silicate Na 2 SiO 3 Sodium bisulfate NaHSO 4 Sodium nitrite NaNO 2 Sodium nitrate NaNO 3 Sodium sulfate Na 2 SO 4 Sodium chlorate NaClO 3 Sodium carbonate Na 2 CO 3

E M B I B E

TOGETHER WITH CHEMISTRY>Chapter 1 - The Language of Chemistry>Self Evaluation Test>Q 12

MEDIUM

9th ICSE

IMPORTANT

Earn 100

Write the chemical formula of aluminium sulphate by the criss-cross method.

Important Questions on The Language of Chemistry

EASY

9th ICSE

IMPORTANT

TOGETHER WITH CHEMISTRY>Chapter 1 - The Language of Chemistry>PRACTICE QUESTIONS>Q 1

Match the following:-

	Column I	Column II
	(Elements)	(Symbol)
(i)	Fluorine	Sc
(ii)	Sodium	C
(iii)	carbon	Xe
(iv)	Sulphur	Hg
(v)	Xenon	Cu
(vi)	Lead	F
(vii)	Mercury	Ti
(viii)	Copper	Pb
(ix)	Titanium	S
(x)	Scandium	Na

MEDIUM

9th ICSE

IMPORTANT

TOGETHER WITH CHEMISTRY>Chapter 1 - The Language of Chemistry>PRACTICE QUESTIONS>Q 2

Match the following:

Name of the compounds	Formulae
(i) Sodium hypochlorite	(a) ${Na}_{2} {SO}_{4}$
(ii) Sodium zincate	(b) ${Na}_{2} {CO}_{3}$
(iii) Sodium bicarbonate	(c) ${NaClO}_{3}$
(iv) Sodium silicate	(d) ${NaNO}_{2}$
(v) Sodium bisulfate	(e) ${Na}_{2} {SiO}_{3}$
(vi) Sodium nitrite	(f) ${Na}_{2} {ZnO}_{2}$
(vii) Sodium nitrate	(g) $NaClO$
(viii) Sodium sulfate	(h) ${NaHCO}_{3}$
(ix) Sodium chlorate	(i) ${NaHSO}_{4}$
(x) Sodium carbonate	(j) ${NaNO}_{3}$