d- and f-Block Elements — practice questions
67 curated practice questions from d- and f-Block Elements (Chemistry JEE Advanced, NTA Exams) — 64 hard, 3 medium. Every question includes the final answer free; step-by-step worked solutions with a free account.
- A white substance ‘X’ when heated in a test tube, it produces a colourless, odourless gas, leaving a residue, yellow…
- The compound in which nickel has the lowest oxidation state is :
- Which of the following will not be oxidised by O 3 ? (2005)
- Choose correct statement(s) regarding the following reaction. Cr _ 2 O _ 7 ^ 2- ( aq )+3 SO _ 3 ^ 2- ( aq )+8 H ^ + 2…
- An element of 3d-transition series shown two oxidation states x and y, differ by two units then:
- The solubility of silver bromide in hypo solution is due to the formation of :
- AgNO _ 3 ( ~W )+( X )+ O _ 2 ( X )+ H _ 2 O HNO _ 2 + HNO _ 3 ( W )+ HNO _ 3 Y + NO + H _ 2 O ( Y )+ Na _ 2 ~S _ 2 O _…
- Among the following, the compound that is both paramagnetic and coloured is
- A white substance ‘X’ when heated in a test tube, it produces a colourless, odourless gas, leaving a residue, yellow…
- A mixture of two salts is used to prepare a solution S, which gives the following results: (2021) array l (aqsolution)…
- Which of the following is the correct formula for a compound of scandium and oxygen ?
- Sodium thiosulphate is used to remove the unexposed AgBr from photographic films by forming a complex. In this complex…
- Identify P in given reaction KI + MnO _ 4 ^ - OH ^ - IO _ 3 ^ - + P
- Assertion : CuSO 4 .5H 2 O and FeSO 4 .7H 2 O are blue and green colour compounds respectively. Reason : Both compounds…
- Which of the following statements regarding copper salts is not true ?
- The reaction of K 3 [Fe(CN) 6 ] with freshly prepared FeSO 4 solution produces a dark blue precipitate called…
- The colour of light abosrbed by an aqueous solution of CuSO 4 is (2011)
- Assertion : Zn gives H 2 gas with dil. HCl and also with dil. H 2 SO 4 . Reason : NO _ 3 ^ - ion is reduced in…
- Which of the following mixture is known as Fenton’s reagent ?
- KMnO 4 oxidizes thiosulphate to SO _ 4 ^ 2- as per reaction xMnO _ 4 ^ - +3 ~S _ 2 O _ 3 ^ 2- + H _ 2 O xMnO _ 2 +6 SO…
- HgCl 2 is a covalent compound, sparingly soluble in water, the solubility increases by the addition of chloride ions…
- When MnO 2 is fused with KOH, a coloured compound is formed, the product and its colour is (2003)
- A blood red colour is obtained when ferric chloride solution reacts with :
- Assertion : KMnO 4 has different equivalent weights in acid, neutral or alkaline medium. Reason : In different medium…
- Assertion : Cu 2+ is more stable than Cu + . Reason : Electrode potential is more important in determining stable…
- The correct statement(s) about Cr 2+ and Mn 3+ is (are) [Atomic numbers of Cr = 24 and Mn = 25] (2015)
- Give the correct order of initials T or F for following statements. Use T if statement is true and F if it is false…
- Fe(OH) 2 is precipitated from Fe(II) solutions as a white solid but turns dark green and then brown due to the…
- Assertion : Cu + is less stable than Cu 2+ but Fe 3+ is more stable than Fe 2+ . Reason : Half filled and completely…
- Assertion : CrO 3 reacts with HCl to form chromyl chloride gas. Reason : Chromyl chloride (CrO 2 Cl 2 ) has tetrahedral…
- A certain metal (X) is boiled in dilute HNO 3 to give a salt (Y) and an oxide of nitrogen (Z). An aqueous solution of…
- Sodium thiosulphate, Na 2 S 2 O 3 .5H 2 O is used in photography to :
- Assertion : AgNO 3 reacts with KCN to form white ppt. of AgCN. This white ppt. disappears when excess KCN is added…
- Assertion : Melting point of Mn is more than that of Fe. Reason : Mn has higher number of unpaired e – than Fe in…
- Native silver metal forms a water soluble complex with a dilute aqueous solution of NaCN in the presence of (2008)
- Silver nitrate solution is kept in brown bottles in laboratory because :
- Amongst the following, identify the species with an atom in +6 oxidation state (2000)
- A certain metal (X) is boiled in dilute HNO 3 to give a salt (Y) and an oxide of nitrogen (Z). An aqueous solution of…
- Consider the following reaction (unbalanced) Zn + hot conc. H 2 SO 4 → G + R + X Zn + conc. NaOH → T + Q G + H 2 S + NH…
- The reaction of K 3 [Fe(CN) 6 ] with freshly prepared FeSO 4 solution produces a dark blue precipitate called…
- A white substance ‘X’ when heated in a test tube, it produces a colourless, odourless gas, leaving a residue, yellow…
- When acidified K 2 Cr 2 O 7 solution is added to Sn +2 salt then Sn +2 changes to
- To an acidified dichromate solution, a pinch of Na 2 O 2 is added and shaken. What is observed?
- When I – is oxidised by MnO _ 4 ^ - in alkaline medium, I – converts into (2004)
- When steam is passed over red hot iron, the substances formed are :
- A certain metal (X) is boiled in dilute HNO 3 to give a salt (Y) and an oxide of nitrogen (Z). An aqueous solution of…
- The oxidation state of copper changes when aqueous copper (II) ions react with : (I) NaOH (aq) (II) Fe(s) (III) KI (aq)
- Which of the following pair is expected to exhibit same colour in solution ? (2005)
- Mercury is the only metal which is liquid at 0ºC. This is due to its :
- Fusion of MnO 2 , with KOH in presence of O 2 produces a salt W. Alkaline solution of W upon electrolytic oxidation…
- The reaction of K 3 [Fe(CN) 6 ] with freshly prepared FeSO 4 solution produces a dark blue precipitate called…
- (NH 4 ) 2 Cr 2 O 7 on heating gives a gas which is also given by (2004)
- Zinc (II) ion on reaction with NaOH first give a white precipitate which dissolves in excess of NaOH due to the…
- Assertion : KMnO 4 is purple in colour due to charge transfer. Reason : There is no electron present in d-orbitals of…
- Hybridization of Cr in K 2 Cr 2 O 7 is
- In the scheme given below, X and Y , respectively, are array ll Metal halide aq. NaOH & array c White precipitate (P) +…
- Copper is very slowly oxidised on the surface in moist air, giving a green coating. The formula of this green coating…
- Which of the following combination will produce H 2 gas? (2018)
- A white precipitate of AgCl dissolves in excess of : (I) NH 3 (aq) (II) Na 2 S 2 O 3 (III) NaCN
- The green colour produced in the borax bead test of a chromium(III) salt is due to
- Na 2 CO 3 + Fe 2 O 3 → A + CO 2 what is A in the reaction ?
- In the process of extraction of gold. Roasted gold ore + CN – + H 2 O O _ 2 [X] + OH – [X] + Zn ⟶ [Y] + Au Identify the…
- Fe 3+ is reduced to Fe 2+ by using (2015)
- Philosopher’s wool when heated with BaO at 1100ºC gives the compound :
- The pair of compounds having metals in their highest oxidation state is (2004)
- When AgNO 3 comes in contact with skin, it leaves a black stain. This is because of :
- Assertion : Zn(OH) 2 is dissolved in both NH 4 OH and NaOH solution. Reason : Both NaOH and NH 4 OH being basic can…