Language of Chemistry Class 7 Worksheet with Answers & Notes

Symbols of Elements

Subtopic

Symbols of Elements under Language of Chemistry for Grade 7 ICSE.

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1.
$Ra$
A. $Radon$
B. $Radium$
C. $Rhenium$
D. $Rubidium$
2.
$Which of these is a single-letter symbol for an element?$
A. $Ne$
B. $Mg$
C. $F$
D. $Cl$
3.
$He$
A. $Boron$
B. $Phosphorus$
C. $Lithium$
D. $Sulfur$
4.
$What is the symbol for the element Radon?$
A. $Ra$
B. $Rn$
C. $Rd$
D. $Ro$
5.
$Which of the following is the symbol for the element Silicon?$
A. $S$
B. $Sc$
C. $Si$
D. $Sn$
6.
$Au$
A. $It is the standard convention for the second letter of a symbol$
B. $To show that the element is a non-metal$
C. $Because 'u' is a vowel$
D. $It was a mistake made by early chemists$
7.
$Ba$
A. $Bo$
B. $Br$
C. $B$
D. $Be$
8.
$K$
A. $P$
B. $K$
C. $K$
D. $K$
9.
$C$
A. $Ce$
B. $Cs$
C. $Cm$
D. $Ci$
10.
$Which of the following is the correct symbol for the element 'Nickel'?$
A. $N$
B. $Ni$
C. $Ne$
D. $Nk$

Download the worksheet for Language of Chemistry - Symbols of Elements to practice offline. It includes additional chapter-level practice questions.

Writing Chemical Formulae

Subtopic

Writing Chemical Formulae under Language of Chemistry for Grade 7 ICSE.

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1.
$Which of these is the correct symbol for Fluorine?$
A. $Fl$
B. $Fu$
C. $F$
D. $Fe$
2.
$What is the formula for Carbon monoxide?$
A. $CO$
B. $CO_2$
C. $C_2O$
D. $CO_3$
3.
$He$
A. $Hydrogen$
B. $Hafnium$
C. $Helium$
D. $Mercury$
4.
$NH_3$
A. $1$
B. $2$
C. $3$
D. $4$
5.
$When writing chemical formulae, if the valencies of the combining elements are equal, they are simplified to their simplest ratio. Following the 'criss-cross' method shown in the diagram, what is the correct formula for Aluminium nitride? (Given: Valency of Aluminium = 3, Valency of Nitrogen = 3)$
A. $Al_3N_3$
B. $AlN_3$
C. $AlN$
D. $Al_3N$
6.
$SO_4$
A. $KSO_4$
B. $K_2SO_4$
C. $K(SO_4)_2$
D. $K_2(SO_4)_2$
7.
$E$
A. $E_2O$
B. $EO_2$
C. $EO$
D. $E_2O_2$
8.
$M$
A. $1$
B. $2$
C. $3$
D. $4$
9.
$What is the correct chemical formula for 'Ammonium Permanganate'?$
A. $NH_4MnO_4$
B. $(NH_4)_2MnO_4$
C. $NH_4(MnO_4)_2$
D. $NH_4Mn_2O_7$
10.
$Determine the formula of 'Mercuric Phosphide'.$
A. $HgP$
B. $Hg_2P_3$
C. $Hg_3P_2$
D. $Hg_3(PO_4)_2$

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Chemical Equations

Subtopic

Chemical Equations under Language of Chemistry for Grade 7 ICSE.

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1.
$NH_3$
A. $1$
B. $2$
C. $3$
D. $4$
2.
$What is the formula for the Ammonium radical?$
A. $NH_3$
B. $NH_4$
C. $NH_2$
D. $N_2H$
3.
$Which of the following is the symbol for Helium?$
A. $H$
B. $Hl$
C. $He$
D. $Ha$
4.
$What is the chemical formula for Nitric Acid?$
A. $NH_3$
B. $HNO_3$
C. $HNO_2$
D. $H_3N$
5.
$What is the atomicity of Phosphorus in its elemental form?$
A. $Monoatomic$
B. $Diatomic$
C. $Triatomic$
D. $P_4$
6.
$CO_2$
A. $One carbon atom shares 2 electrons with two oxygen atoms$
B. $One carbon atom shares 4 electrons with two oxygen atoms$
C. $One carbon atom loses 4 electrons to oxygen$
D. $Two carbon atoms share 2 electrons with one oxygen atom$
7.
$Which of these is the correct formula for Ferric oxide?$
A. $FeO$
B. $Fe_2O_3$
C. $Fe_3O_2$
D. $Fe_3O_4$
8.
$What is the correct chemical formula for 'Magnesium perchlorate'?$
A. $Mg(ClO_4)_2$
B. $MgClO_4$
C. $Mg_2ClO_4$
D. $Mg(ClO_3)_2$
9.
$3Fe + 4H_2O \rightarrow Fe_3O_4 + 4H_2$
A. $The equation remains balanced$
B. $The equation becomes unbalanced$
C. $The law of conservation of mass is violated$
D. $The products change$
10.
$X$
A. $X_2O$
B. $XO$
C. $XO_2$
D. $X_2O_3$

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Balancing Equations

Subtopic

Balancing Equations under Language of Chemistry for Grade 7 ICSE.

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1.
$H_{2} + O_{2} \rightarrow H_{2}O$
A. $Hydrogen$
B. $Oxygen$
C. $Both Hydrogen and Oxygen$
D. $Neither$
2.
$What is the symbol for the element Potassium?$
A. $P$
B. $Po$
C. $K$
D. $Pt$
3.
$Which side of the chemical equation shows the substances that react together?$
A. $Right side$
B. $Left side$
C. $Above the arrow$
D. $Below the arrow$
4.
$Al_{2}O_{3}$
A. $3 Aluminum atoms$
B. $3 Oxygen atoms$
C. $3 molecules of AlO$
D. $Total of 3 atoms$
5.
$CS_2 + O_2 \rightarrow CO_2 + SO_2$
A. $1$
B. $2$
C. $3$
D. $4$
6.
$PCl_3 + 3H_2O \rightarrow H_3PO_3 + 3HCl$
A. $6$
B. $8$
C. $10$
D. $4$
7.
$Which of the following is correctly balanced?$
A. $Mg + O \rightarrow MgO$
B. $2Na + Cl_2 \rightarrow 2NaCl$
C. $H_2 + O_2 \rightarrow H_2O$
D. $Zn + HCl \rightarrow ZnCl_2 + H_2$
8.
$K_2Cr_2O_7 + H_2SO_4 + SO_2 \rightarrow K_2SO_4 + Cr_2(SO_4)_3 + H_2O$
A. $1$
B. $2$
C. $3$
D. $4$
9.
$Pb_3O_4 + HNO_3 \rightarrow Pb(NO_3)_2 + PbO_2 + H_2O$
A. $1$
B. $2$
C. $3$
D. $4$
10.
$H_2SO_4$
A. $1$
B. $2$
C. $3$
D. $4$

Download the worksheet for Language of Chemistry - Balancing Equations to practice offline. It includes additional chapter-level practice questions.

Language of Chemistry

Symbols of Elements

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Writing Chemical Formulae

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Chemical Equations

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Balancing Equations

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