Compounds of transition elements
CHXII08:THE D- & F-BLOCK ELEMENTS

321322 Out of the 5 different products formed in the following reaction, how many contains O -atom(s)? ____ .
\({\mathrm{\mathrm{KMnO}_{4}+\mathrm{Na}_{2} \mathrm{O}_{2}+\mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow}}\)

1 5
2 4
3 3
4 1
CHXII08:THE D- & F-BLOCK ELEMENTS

321323 Assertion :
\(\mathrm{KMnO}_{4}\) is stored in dark bottles.
Reason :
On heating with alkalies, \(\mathrm{KMnO}_{4}\) is converted to manganate.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS

321324 The formula mass of Mohr's salt is 392. The iron present in it is oxidised by \(\mathrm{\mathrm{KMnO}_{4}}\) in acid medium. The equivalent mass of Mohr's salt is

1 392
2 31.6
3 278
4 156
CHXII08:THE D- & F-BLOCK ELEMENTS

321325 Aqueous solution of a salt (A) forms a dense white precipitate with \(\mathrm{\mathrm{BaCl}_{2}}\) solution. The precipitate dissolves in dilute \(\mathrm{\mathrm{HCl}}\) to produce a gas (B) which decolourises acidified \(\mathrm{\mathrm{KMnO}_{4}}\) solution. A and \(\mathrm{\mathrm{B}}\) respectively are

1 \({\rm{BaS}}{{\rm{O}}_{\rm{4}}}{\rm{,}}{{\rm{H}}_{\rm{2}}}{\rm{S}}\)
2 \({\rm{BaS}}{{\rm{O}}_{\rm{3}}}{\rm{,}}{{\rm{H}}_{\rm{2}}}{\rm{S}}\)
3 \({\rm{BaS}}{{\rm{O}}_{\rm{4}}}{\rm{,S}}{{\rm{O}}_{\rm{2}}}\)
4 \({\rm{BaS}}{{\rm{O}}_{\rm{3}}}{\rm{,S}}{{\rm{O}}_{\rm{2}}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321326 When a small amount of \(\mathrm{\mathrm{KMnO}_{4}}\) is added to concentrated \(\mathrm{\mathrm{H}_{2} \mathrm{SO}_{4}}\), a green oily compound is obtained which is highly explosive in nature. Compound may be

1 \(\mathrm{\mathrm{MnSO}_{4}}\)
2 \(\mathrm{\mathrm{Mn}_{2} \mathrm{O}_{7}}\)
3 \(\mathrm{\mathrm{MnO}_{2}}\)
4 \(\mathrm{\mathrm{Mn}_{2} \mathrm{O}_{3}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321322 Out of the 5 different products formed in the following reaction, how many contains O -atom(s)? ____ .
\({\mathrm{\mathrm{KMnO}_{4}+\mathrm{Na}_{2} \mathrm{O}_{2}+\mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow}}\)

1 5
2 4
3 3
4 1
CHXII08:THE D- & F-BLOCK ELEMENTS

321323 Assertion :
\(\mathrm{KMnO}_{4}\) is stored in dark bottles.
Reason :
On heating with alkalies, \(\mathrm{KMnO}_{4}\) is converted to manganate.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS

321324 The formula mass of Mohr's salt is 392. The iron present in it is oxidised by \(\mathrm{\mathrm{KMnO}_{4}}\) in acid medium. The equivalent mass of Mohr's salt is

1 392
2 31.6
3 278
4 156
CHXII08:THE D- & F-BLOCK ELEMENTS

321325 Aqueous solution of a salt (A) forms a dense white precipitate with \(\mathrm{\mathrm{BaCl}_{2}}\) solution. The precipitate dissolves in dilute \(\mathrm{\mathrm{HCl}}\) to produce a gas (B) which decolourises acidified \(\mathrm{\mathrm{KMnO}_{4}}\) solution. A and \(\mathrm{\mathrm{B}}\) respectively are

1 \({\rm{BaS}}{{\rm{O}}_{\rm{4}}}{\rm{,}}{{\rm{H}}_{\rm{2}}}{\rm{S}}\)
2 \({\rm{BaS}}{{\rm{O}}_{\rm{3}}}{\rm{,}}{{\rm{H}}_{\rm{2}}}{\rm{S}}\)
3 \({\rm{BaS}}{{\rm{O}}_{\rm{4}}}{\rm{,S}}{{\rm{O}}_{\rm{2}}}\)
4 \({\rm{BaS}}{{\rm{O}}_{\rm{3}}}{\rm{,S}}{{\rm{O}}_{\rm{2}}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321326 When a small amount of \(\mathrm{\mathrm{KMnO}_{4}}\) is added to concentrated \(\mathrm{\mathrm{H}_{2} \mathrm{SO}_{4}}\), a green oily compound is obtained which is highly explosive in nature. Compound may be

1 \(\mathrm{\mathrm{MnSO}_{4}}\)
2 \(\mathrm{\mathrm{Mn}_{2} \mathrm{O}_{7}}\)
3 \(\mathrm{\mathrm{MnO}_{2}}\)
4 \(\mathrm{\mathrm{Mn}_{2} \mathrm{O}_{3}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321322 Out of the 5 different products formed in the following reaction, how many contains O -atom(s)? ____ .
\({\mathrm{\mathrm{KMnO}_{4}+\mathrm{Na}_{2} \mathrm{O}_{2}+\mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow}}\)

1 5
2 4
3 3
4 1
CHXII08:THE D- & F-BLOCK ELEMENTS

321323 Assertion :
\(\mathrm{KMnO}_{4}\) is stored in dark bottles.
Reason :
On heating with alkalies, \(\mathrm{KMnO}_{4}\) is converted to manganate.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS

321324 The formula mass of Mohr's salt is 392. The iron present in it is oxidised by \(\mathrm{\mathrm{KMnO}_{4}}\) in acid medium. The equivalent mass of Mohr's salt is

1 392
2 31.6
3 278
4 156
CHXII08:THE D- & F-BLOCK ELEMENTS

321325 Aqueous solution of a salt (A) forms a dense white precipitate with \(\mathrm{\mathrm{BaCl}_{2}}\) solution. The precipitate dissolves in dilute \(\mathrm{\mathrm{HCl}}\) to produce a gas (B) which decolourises acidified \(\mathrm{\mathrm{KMnO}_{4}}\) solution. A and \(\mathrm{\mathrm{B}}\) respectively are

1 \({\rm{BaS}}{{\rm{O}}_{\rm{4}}}{\rm{,}}{{\rm{H}}_{\rm{2}}}{\rm{S}}\)
2 \({\rm{BaS}}{{\rm{O}}_{\rm{3}}}{\rm{,}}{{\rm{H}}_{\rm{2}}}{\rm{S}}\)
3 \({\rm{BaS}}{{\rm{O}}_{\rm{4}}}{\rm{,S}}{{\rm{O}}_{\rm{2}}}\)
4 \({\rm{BaS}}{{\rm{O}}_{\rm{3}}}{\rm{,S}}{{\rm{O}}_{\rm{2}}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321326 When a small amount of \(\mathrm{\mathrm{KMnO}_{4}}\) is added to concentrated \(\mathrm{\mathrm{H}_{2} \mathrm{SO}_{4}}\), a green oily compound is obtained which is highly explosive in nature. Compound may be

1 \(\mathrm{\mathrm{MnSO}_{4}}\)
2 \(\mathrm{\mathrm{Mn}_{2} \mathrm{O}_{7}}\)
3 \(\mathrm{\mathrm{MnO}_{2}}\)
4 \(\mathrm{\mathrm{Mn}_{2} \mathrm{O}_{3}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321322 Out of the 5 different products formed in the following reaction, how many contains O -atom(s)? ____ .
\({\mathrm{\mathrm{KMnO}_{4}+\mathrm{Na}_{2} \mathrm{O}_{2}+\mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow}}\)

1 5
2 4
3 3
4 1
CHXII08:THE D- & F-BLOCK ELEMENTS

321323 Assertion :
\(\mathrm{KMnO}_{4}\) is stored in dark bottles.
Reason :
On heating with alkalies, \(\mathrm{KMnO}_{4}\) is converted to manganate.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS

321324 The formula mass of Mohr's salt is 392. The iron present in it is oxidised by \(\mathrm{\mathrm{KMnO}_{4}}\) in acid medium. The equivalent mass of Mohr's salt is

1 392
2 31.6
3 278
4 156
CHXII08:THE D- & F-BLOCK ELEMENTS

321325 Aqueous solution of a salt (A) forms a dense white precipitate with \(\mathrm{\mathrm{BaCl}_{2}}\) solution. The precipitate dissolves in dilute \(\mathrm{\mathrm{HCl}}\) to produce a gas (B) which decolourises acidified \(\mathrm{\mathrm{KMnO}_{4}}\) solution. A and \(\mathrm{\mathrm{B}}\) respectively are

1 \({\rm{BaS}}{{\rm{O}}_{\rm{4}}}{\rm{,}}{{\rm{H}}_{\rm{2}}}{\rm{S}}\)
2 \({\rm{BaS}}{{\rm{O}}_{\rm{3}}}{\rm{,}}{{\rm{H}}_{\rm{2}}}{\rm{S}}\)
3 \({\rm{BaS}}{{\rm{O}}_{\rm{4}}}{\rm{,S}}{{\rm{O}}_{\rm{2}}}\)
4 \({\rm{BaS}}{{\rm{O}}_{\rm{3}}}{\rm{,S}}{{\rm{O}}_{\rm{2}}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321326 When a small amount of \(\mathrm{\mathrm{KMnO}_{4}}\) is added to concentrated \(\mathrm{\mathrm{H}_{2} \mathrm{SO}_{4}}\), a green oily compound is obtained which is highly explosive in nature. Compound may be

1 \(\mathrm{\mathrm{MnSO}_{4}}\)
2 \(\mathrm{\mathrm{Mn}_{2} \mathrm{O}_{7}}\)
3 \(\mathrm{\mathrm{MnO}_{2}}\)
4 \(\mathrm{\mathrm{Mn}_{2} \mathrm{O}_{3}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321322 Out of the 5 different products formed in the following reaction, how many contains O -atom(s)? ____ .
\({\mathrm{\mathrm{KMnO}_{4}+\mathrm{Na}_{2} \mathrm{O}_{2}+\mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow}}\)

1 5
2 4
3 3
4 1
CHXII08:THE D- & F-BLOCK ELEMENTS

321323 Assertion :
\(\mathrm{KMnO}_{4}\) is stored in dark bottles.
Reason :
On heating with alkalies, \(\mathrm{KMnO}_{4}\) is converted to manganate.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS

321324 The formula mass of Mohr's salt is 392. The iron present in it is oxidised by \(\mathrm{\mathrm{KMnO}_{4}}\) in acid medium. The equivalent mass of Mohr's salt is

1 392
2 31.6
3 278
4 156
CHXII08:THE D- & F-BLOCK ELEMENTS

321325 Aqueous solution of a salt (A) forms a dense white precipitate with \(\mathrm{\mathrm{BaCl}_{2}}\) solution. The precipitate dissolves in dilute \(\mathrm{\mathrm{HCl}}\) to produce a gas (B) which decolourises acidified \(\mathrm{\mathrm{KMnO}_{4}}\) solution. A and \(\mathrm{\mathrm{B}}\) respectively are

1 \({\rm{BaS}}{{\rm{O}}_{\rm{4}}}{\rm{,}}{{\rm{H}}_{\rm{2}}}{\rm{S}}\)
2 \({\rm{BaS}}{{\rm{O}}_{\rm{3}}}{\rm{,}}{{\rm{H}}_{\rm{2}}}{\rm{S}}\)
3 \({\rm{BaS}}{{\rm{O}}_{\rm{4}}}{\rm{,S}}{{\rm{O}}_{\rm{2}}}\)
4 \({\rm{BaS}}{{\rm{O}}_{\rm{3}}}{\rm{,S}}{{\rm{O}}_{\rm{2}}}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321326 When a small amount of \(\mathrm{\mathrm{KMnO}_{4}}\) is added to concentrated \(\mathrm{\mathrm{H}_{2} \mathrm{SO}_{4}}\), a green oily compound is obtained which is highly explosive in nature. Compound may be

1 \(\mathrm{\mathrm{MnSO}_{4}}\)
2 \(\mathrm{\mathrm{Mn}_{2} \mathrm{O}_{7}}\)
3 \(\mathrm{\mathrm{MnO}_{2}}\)
4 \(\mathrm{\mathrm{Mn}_{2} \mathrm{O}_{3}}\)