Ionic Compounds Chemical Formula

Q.

What are some important scientific prefixes?

Q.

Write the name of the compound $\mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_2$.

Q. The molecular formula of potassium nitrate is:

1. $KN{O}_3$
2. $KNO$
3. $KN{O}_2$
4. $KON$

Q.

5. Write the names of the following compounds.

iii. NaCl

Q.

16. The formula of a zincate radical is _______.

Q. Which of the following represents the chemical formula of calcium carbonate?

1. $Ca{CO}_3$
2. ${Ca}_2{CO}_3$​
3. $Ca({CO}_3{)}_2$
4. ${Ca}_{3}C{O}_2$​

Q.

Which of these is a polyatomic ion?

${{SO}_4}^{-2}$, ${{NO}_3}^{-1}$, ${{CO}_3}^{-2}$

1. ${{SO}_4}^{-2}$

2. ${{NO}_3}^{-1}$

3. ${{CO}_3}^{-2}$

4. All of the given options are correct.

Q.

Question 13
Write the molecular formulae of all the compounds that can be formed by the combination of following ions
$C{u}^{2+},N{a}^{+},F{e}^{3+},C{l}^{-},S{O}_4^2,P{O}_4^{3-}$

Q. Chemical formula of a compound is determined on the basis of __________ of its constituents.

1. valency
2. atomic size
3. number of neutrons
4. atomic mass

Q. Which of the following molecule(s) is/are polyatomic?​

I) ${\text{H}}_2$${\text{SO}}_4$
II) Ar
III) ${\text{HNO}}_3$

1. Both I and III
2. Only I
3. Only II
4. Both II and III

Q. Write the molecular formulae of all the compounds that can be formed by the combination of following ions
$C{u}^{2+},N{a}^{+},F{e}^{3+},C{l}^{-},S{O}_4^2,P{O}_4^{3-}$

Q. (a) Define atomicity with an example.

(b) Write the historical name and systematic name of the following ions :
$C{u}^{+},C{u}^{+2},F{e}^{+2},F{e}^{+3}$

Q. Write the molecular formulae of all the compounds that can be formed by the combination of following ions
$C{u}^{2+},N{a}^{+},F{e}^{3+},C{l}^{-},S{O}_4^2,P{O}_4^{3-}$

Q.

Match the following :

$$\begin{array}{cc}Element/Substance& Atomicity\\ \left(i\right)Hydrogen& \left(A\right)3\\ \left(ii\right)Argon& \left(B\right)6\\ \left(iii\right)Sulphur& \left(C\right)Diatomic\\ \left(iv\right)Carbondioxide& \left(D\right)Monoatomic\\ \left(v\right)AmmoniumChloride& \left(E\right)Polyatomic\end{array}$$

1. i-B; ii-A; iii-D; iv-E; v-C
2. i-D; ii-E; iii-C; iv-B; v-A
3. i-D; ii-B; iii-A; iv-E; v-C
4. i-C; ii-D; iii-E; iv-A; v-B

Q. Write the molecular formulae of all the compounds that can be formed by the combination of following ions
$C{u}^{2+},N{a}^{+},F{e}^{3+},C{l}^{-},S{O}_4^2,P{O}_4^{3-}$

Q.

Derive the molecular formulae of the following compounds stepwise and give their atomicity.

Iron(II) carbonate

Q.

Which one of the following statement is correct?

1. Formula can be written by balancing the valencies of the different atoms.

2. Formula can be written by reducing the valencies of different atoms.

3. Formula are not affected by the presence of valencies.

4. Formula can be written by adding the valencies of different atoms.

Q.

30. If the formula of metal sulphite of a metal M is MSO₃, give the formula of its

(a) phosphate

(b) hydrogen phosphate

(c) chloride