Naming a Chemical Compound

Q. What is the chemical name of the compound ${\mathrm{FeCl}}_3$?

1. Iron(II) chloride
2. Ferrous chloride
3. Iron(III) chloride
4. Iron(I) chloride

Q. Question 1.1
A solution of a substance ‘X’ is used for white washing.
(i) Name the substance ‘X’ and write its formula.

Q.

Elements with a valency equal to 3 are called ___________

Q.

Which of the following represent the compound $CuC{l}_2$?

1. Copper(I) chloride
2. Copper(II) chloride
3. Cupric chloride
4. Cuprous chloride

Q. ${\text{(NH}}_4{)}^{+}$, $({\text{SO}}_4{)}^{2-}$ are examples of .

1. monoatomic ions
2. polyatomic ions
3. compounds
4. elements

Q.

Give any one metal, which forms more than one type of positive ions.

Q.

Define polyatomic ions. Write an example.

Q.

What is the general name of $CaC{O}_3$?

1. Washing Soda

2. Limestone

3. Silica

4. Baking Soda

Q.

What is the chemical formula of Caustic Soda?

1. $NaOH$

2. $NaHC{O}_3$

3. $N{a}_{2}C{O}_3$

4. $N{a}_{2}Si{O}_3$

Q. Which of the following is an electron - deficient compound ?

1. $N{H}_3$
2. $ICl$
3. $BC{l}_3$
4. $PC{l}_3$

Q.

What $N{a}_{2}C{O}_3$ denotes?

1. 2 molecules of Sodium Carbonate

2. 2 atoms of sodium

3. 1 atom of Carbon

4. 3 atoms of Oxygen

Q.

Which of the following mineral does not contain Al ?

1. Cryolite

2. Mica

3. Felspar

4. Fluorspar

Q.

Write down the formulae of

(i) Sodium oxide

(ii) Aluminium chloride

(iii) Sodium sulphide [3 MARKS]​

Q. Match the chemical formulae with the corresponding compounds.

1. Sodium chloride
2. Lithium oxide
3. Aluminium oxide
4. Hydrogen bromide

Q. The chemical name of $CaC{O}_3$ is:

1. Calcium carbide
2. Calcium oxide
3. Calcium carbonate
4. Calcium hydroxide

Q. What is the chemical name of quick lime?

1. Calcium oxide
2. Calcium carbonate
3. Calcium hydroxide
4. Carbon dioxide

Q. Which of the following are correct?

1. Sodium Chlorite - NaClO
2. Sodium hypochlorite - $NaCl{O}_2$
3. Sodium Perchlorate - $NaCl{O}_4$
4. Sodium Chlorate - $NaCl{O}_3$

Q.

Which of the following chemical formulae is correct?

1. NaCl₂

2. KCl

3. NaCl₃

4. KCl₄

Q. Find the valency of each element mentioned in the following substances:
i) Aluminium in $A{l}_2(S{O}_4{)}_3$ ii) Lead in $Pb{O}_2$ iii) Calcium in $CaO$
iv) Nickel in $NiC{O}_3$ v) Barium in $BaS{O}_3$ vi) Iron in $FeC{l}_2$
vii) Iron in $FeC{l}_3$ viii) Gold in $AuC{l}_3$ ix) Cobalt in $Co(N{O}_3{)}_3$
x) Tin in $Sn(S{O}_4{)}_2$

Q. Question 1 (ii)
Write down the formulae of:
(ii) Aluminium chloride

Q. What is the chemical name of the compound $FeC{l}_3$?

1. Ferrous Chloride
2. Iron(II) Chloride
3. Iron (III) Chloride
4. Aluminium Chloride

Q. Which of the following are correct?

1. Sodium hypochlorite - $NaCl{O}_2$
2. Sodium Perchlorate - $NaCl{O}_4$
3. Sodium Chlorite - NaClO
4. Sodium Chlorate - $NaCl{O}_3$

Q. Match the chemical formulae with the corresponding compounds.

1. Lithium oxide
2. Sodium chloride
3. Aluminium oxide
4. Hydrogen bromide

Q. Arrange the positive ions in the increasing order of valency (top to bottom).

1. Calcium
2. Aluminium
3. Lithium
4. Lead [IV]

Q. What is the chemical name of the compound ${\mathrm{FeCl}}_3$?

1. Iron(II) chloride
2. Ferrous chloride
3. Iron(III) chloride
4. Iron(I) chloride

Q.

What is the chemical formula of Caustic Soda?

1. $NaOH$

2. $NaHC{O}_3$

3. $N{a}_{2}C{O}_3$

4. $N{a}_{2}Si{O}_3$

Q. What is the chemical formula of ammonium chloride?

1. ${\text{NH}}_3\text{Cl}$
2. ${\text{NH}}_4\text{Cl}$
3. $\text{NH}\text{Cl}$
4. ${\text{NHCl}}_4$

Q. Match the chemical formulae with the corresponding compounds.

1. Aluminium oxide
2. Hydrogen bromide
3. Sodium chloride
4. Lithium oxide