The d- and f-Block Elements — practice questions
86 curated practice questions from The d- and f-Block Elements (Chemistry Class 12, CBSE) — 85 easy, 1 hard. Every question includes the final answer free; step-by-step worked solutions with a free account.
- In which of the following pairs of ions, the lower oxidation state in aqueous solution is more stable than the other?
- Assertion : KMnO 4 acts as an oxidising agent in acidic, basic or neutral medium. Reason : It oxidises ferrous sulphate…
- Acidified potassium dichromate reacts with potassium iodide and oxidises it to I 2 . What is the oxidation state of…
- The magnetic moment of a divalent ion in aqueous solution with atomic number 25 is
- Why is dilute sulphuric acid used to acidify a permanganate solution in volumetric analysis and not hydrochloric acid?
- Match the column I with column II and mark the appropriate choice. Column I Column II (A) Green vitriol (i) ZnSO 4 .7H…
- Fill in the blanks by choosing an appropriate option. (i) is a synthetic radioactive element of group 15 having…
- Magnetic moment of Ce 3+ ion on the basis of ‘spin-only’ formula will be _____ B.M.
- Which of the following pairs of ions have the same electronic configuration?
- Fe 3 O 4 (magnetite) is an example of
- Match the column I with column II and mark the appropriate choice. Column I Column II (A) Ni in the presence of…
- When acidified K 2 Cr 2 O 7 solution is added to Sn 2+ salts, then Sn 2+ changes to
- The correct configuration of f -block elements is
- Consider the following statements with respect to lanthanides : 1] The basic strength of hydroxides of lanthanides…
- Zr and Hf have almost equal atomic and ionic radii because of
- What happens when potassium iodide reacts with acidic solution of potassium dichromate?
- On addition of small amount of KMnO 4 to concentrated H 2 SO 4 , a green oily compound is obtained which is highly…
- E ° Mn 3+ /Mn 2+ is highly positive than that of E ° Cr 3+ /Cr 2+ or E ° Fe 3+ /Fe 2+ because
- Cu + ion is not stable in aqueous solution because
- The correct order of E ° M 2+ / M values with negative sign for the four successive elements Cr, Mn, Fe and Co is
- The oxidation state of sulphur in the anions SO 3 2– , S 2 O 4 2– and S 2 O 6 2– follows the order
- Which of the following is correct representation of reaction of acidified permanganate solution with sulphurous acid?
- Match the column I with column II and mark the appropriate choice. Column I Column II (A) An element which can show +8…
- Complete the given reaction. 2Mn 2+ + 5 (i) + 8H 2 O → 2 (ii) + 10 (iii) + 16H +
- Identify the species in which the metal atom is in +6 oxidation state.
- Highest oxidation state of manganese in fluoride is +4 (MnF 4 ) but highest oxidation state in oxides is +7 (Mn 2 O 7 )…
- The correct order of ionic radii of Ce, La, Pm and Yb in +3 oxidation state is
- Which one of the following is a ‘ d -block element’?
- The second and third row elements of transition metals resemble each other much more than they resemble the first row…
- Match the column I with column II and mark the appropriate choice. Column I (Property) Column II (Metal) (A) Element…
- Assertion : Cu 2+ iodide is not known. Reason : Cu 2+ oxidises I – to iodine.
- When an oxide of manganese ( P ) is fused with KOH in the presence of an oxidising agent and dissolved in water, it…
- Following order is observed in oxidising power of certain ions: VO 2 + 2 O 7 2– 4 – The reason for this increasing…
- General electronic configuration of transition metals is
- Reactivity of transition elements decreases almost regularly from Sc to Cu because of
- Correct configuration of Gadolinium ( Z = 64) is
- A violet compound of manganese ( P ) decomposes on heating to liberate oxygen and compounds ( Q ) and ( R ) of…
- Complete the following reactions. (i) Cr 2 O 7 2– + 3SO 2 + 2H + → 2Cr 3+ + _____ + H 2 O (ii) Cr 2 O 7 2– + 3SO 3 2– +…
- Assertion : In acidic medium, K 2 Cr 2 O 7 exists as Cr 2 O 7 2– (orange) while in basic medium it is converted to CrO…
- Which of the following reactions show the reducing property of hydrochloric acid?
- When MnO 2 is fused with KOH and O 2 , what is the product formed and its colour? MnO 2 + KOH + O 2 → __?___ + H 2 O
- Although zirconium belongs to 4 d and hafnium to 5 d -transition series even they show similar physical and chemical…
- There are 14 elements in actinoid series. Which of the following elements does not belong to this series?
- V 2 O 5 reacts with alkalies as well as acids to give
- Zn gives hydrogen with H 2 SO 4 and HCl but not with HNO 3 because
- The electronic configuration of Cu(II) is 3 d 9 whereas that of Cu(I) is 3 d 10 . Which of the following is correct?
- In the following question, a statement of assertion is followed by a statement of reason. Mark the correct choice…
- Transition metals make the most efficient catalysts because of their ability to
- Due to lanthanoid contraction which of the following properties is not expected to be similar in the same vertical…
- The colour of KMnO 4 disappears when oxalic acid is added to its solution in acidic medium. This can be explained as
- Which of the following transition metal ions is colourless?
- Actinoids in general show more oxidation states than the lanthanoids. The main reason for this is
- Select the correct option, among Sc(III), Ti(IV), Pd(II) and Cu(II) ions,
- Transition elements form binary compounds with halogens. Which of the following elements will form M F 3 type compounds?
- Which of the following statement concerning lanthanide elements is false?
- Which of the following are basic oxides? Mn 2 O 7 , V 2 O 3 , V 2 O 5 , CrO, Cr 2 O 3
- Which of the following is used to prepare Cl 2 gas at room temperature from concentrated HCl?
- The equation 3MnO 4 2 – + 4H + → 2MnO 4 – + MnO 2 + 2H 2 O represents
- Which group contains coloured ions out of the following? 1] Cu + 2] Ti 4+ 3] Co 2+ 4] Fe 2+
- Which of the following transition metal ions has highest magnetic moment?
- Which of the following statements is correct about stability of the complexes of lanthanoids?
- Complete the given reactions. (A) 2 MnO _ 4 ^ - + H _ 2 O + I ^ - 2 ( i ) +2 OH ^ - + IO _ 3 ^ - (B) MnO _ 4 ^ - +5 Fe…
- The number of unpaired electrons in gaseous species of Mn 3+ , Cr 3+ and V 3+ respectively are _____ and the most…
- What is the total number of inner transition elements in the periodic table?
- Fill the missing products in the following reactions. (i) 2 MnO _ 4 ^ - +16 H ^ + +10 I ^ - 2 Mn ^ 2+ +8 H _ 2 O + (ii)…
- A solution of KMnO 4 is reduced to various products depending upon its pH. At pH < 7 it is reduced to a colourless…
- Which of the following is not correctly matched with the example given?
- Match the column I with column II and mark the appropriate choice. Column I Column II (A) FeSO 4 ⋅7H 2 O (i) Green (B)…
- In the dichromate anion (Cr 2 O 7 2– )
- The oxidation states of most electronegative element in the product of reaction of BaO 2 with dil. H 2 SO 4 are
- Which of the following has no unpaired electrons but is coloured?
- Match the column I with column II and mark the appropriate choice. Column I Column II (A) Mischmetall (i) Alloy of Cu…
- For Zn 2+ , Ni 2+ , Cu 2+ and Cr 2+ which of the following statements is correct?
- Colour of transition metal ions are due to absorption of some wavelength. This results in
- Which of the following reactions do not result in the preparation of potassium dichromate from chromate? (A) 4FeCr 2 O…
- The salts of Cu in +1 oxidation state are unstable because
- Fe 3+ compounds are more stable than Fe 2+ compounds because
- CuSO 4 is paramagnetic while ZnSO 4 is diamagnetic because
- Interstitial compounds are non-stoichiometric compounds formed by trapping small atoms like C, H or N in crystal…
- Which of the following is correct representation of reaction of acidified permanganate solution with sulphur dioxide?
- Arrange the oxides of manganese according to increasing acidic strength.
- Answer the following question on the basis of the given data. Given below are E ° values of a few cells: Which of the…
- Fe 3+ ion is more stable than Fe 2+ ion because
- Which of the following compounds is expected to be coloured?
- Yellow coloured aqueous solution of sodium chromate changes to orange when acidified with sulphuric acid because
- Which of the following d -block element has half-filled penultimate as well as valence subshell?