Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

D and F Block Elements question

2003 · Shift 0 · Q46
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /JEE Main
  3. /Chemistry
  4. /D and F Block Elements
  5. /2003 · Shift 0 · Q46

D and F Block Elements question

2003 · Shift 0 · Q46

JEE MainChemistryD and F Block ElementsMCQ+4 / −1
Which one of the following nitrates will leave behind a metal on strong heating?
  1. A
    Copper nitrate
  2. B
    Manganese nitrate
  3. C
    Silver nitrate
  4. D
    Ferric nitrate
View written solutionFree

Correct answer: C

  1. Rule for thermal decomposition of metal nitrates

On strong heating, metal nitrates decompose differently depending on the metal:

  • Alkali metal nitrates (except lithium) give nitrites + oxygen.
  • Most other metal nitrates give metal oxide + nitrogen dioxide + oxygen.
  • Nitrates of less reactive metals like silver and mercury can finally leave the metal itself.
  1. Check each option

(A) Copper nitrate

Copper nitrate decomposes as: 2 Cu(NO3)2→Δ2 CuO+4 NO2+O22\,Cu(NO_3)_2 \xrightarrow{\Delta} 2\,CuO + 4\,NO_2 + O_22Cu(NO3​)2​Δ​2CuO+4NO2​+O2​ Residue is copper(II) oxide, not copper metal.

(B) Manganese nitrate

Manganese nitrate decomposes to manganese oxide: 2 Mn(NO3)2→Δ2 MnO2+4 NO2+O22\,Mn(NO_3)_2 \xrightarrow{\Delta} 2\,MnO_2 + 4\,NO_2 + O_22Mn(NO3​)2​Δ​2MnO2​+4NO2​+O2​ Residue is an oxide, not metal.

(C) Silver nitrate

Silver nitrate decomposes as: 2 AgNO3→Δ2 Ag+2 NO2+O22\,AgNO_3 \xrightarrow{\Delta} 2\,Ag + 2\,NO_2 + O_22AgNO3​Δ​2Ag+2NO2​+O2​ Residue is silver metal.

(D) Ferric nitrate

Ferric nitrate decomposes as: 4 Fe(NO3)3→Δ2 Fe2O3+12 NO2+3 O24\,Fe(NO_3)_3 \xrightarrow{\Delta} 2\,Fe_2O_3 + 12\,NO_2 + 3\,O_24Fe(NO3​)3​Δ​2Fe2​O3​+12NO2​+3O2​ Residue is ferric oxide, not iron metal.

  1. Conclusion

Only silver nitrate leaves behind the metal on strong heating.

Therefore, the correct option is: C\boxed{C}C​

  1. Comparison with stored correct answer

Stored correct answer: C

My derived answer: C

They agree.

PreviousNext

More from D and F Block Elements

  • The atomic numbers of vanadium (V), Chromium (Cr), manganese (Mn) and iron (Fe) are respectively 23, 24, 25 and 26. Which one of these may be expected to have the highest second ionization enthalpy?2003 · MCQ
  • The radius of La3+ (Atomic number of La = 57) is 1.06 Å. Which one of the following given values will be closest to the radius of Lu3+ (Atomic number of Lu = 71) ?2003 · MCQ
  • The number of d-electrons retained in Fe2+ (At no of Fe = 26) ion is :2003 · MCQ
  • How do we differentiate between Fe3+ and Cr3+ in group III?2002 · MCQ
  • When KMnO4​ acts as an oxidising agent and ultimately forms [MnO4​]2−, MnO2​, Mn2​O3​, Mn2+ then the number of electrons transferred in each case respectively is :2002 · MCQ
  • Which of the following ions has the maximum magnetic moment?2002 · MCQ
  • Most common oxidation states of Ce (cerium) are :2002 · MCQ
  • The metal ions that have the calculated spin-only magnetic moment value of 4.9 B.M. are : A. Cr2+ B. Fe2+ C. Fe3+ D. Co2+ E. Mn3+ Choose the correct answer from the…2025 · MCQ