Zinc and mercury do not show variable valency like d-block elements because

Which one of the following has the maximum number of unpaired electrons

(A)  Mg²⁺                                (B)  Ti³⁺                                 (C)  V³⁺                                (D)  Fe²⁺

The number of unpaired electrons in ferrous ion is

Variable valency is shown by

Which of the following does not have valence electron in 3d-subshell

An elements in+3 oxidation state has the electronic configuration (Ar)3d³. Its atomic number is

The number of unpaired electrons in cobalt atom is (atomic number of Co = 27)

What is the general electronic configuration for 2^nd row transition series

(A)  [Ne]3d^1–10, 4s²                                                      (B)  [Ar]3d^1–10, 4s^1–2

(C)  [Kr]4d^1–10, 5s^1–2                                                    (D)  [Xe]5d^1–10, 5s^1–2

Most powerful oxidizing property of manganese is shown by which of the following oxidation state

The element whose valency is 7 would be

Which of the following element does not show variable valency

In which compound chromium has +6 oxidation state

(A)  K₂Cr₂O₇                           (B)  CrCl₃                               (C)  Cr(SO₄)₃                        (D)  None of these

The number of unpaired electrons is maximum in (Atomic no.  : Ti = 22; V= 23; Cr = 24; Fe = 26)

The number of unpaired electrons in Cr³⁺ ion is

The number of incomplete orbitals in inner transition element is

For which of the following transition metal ion is shown highest magnetic moment having outer electronic configuration

(A)  3d¹                                 (B)  3d⁸                                (C)  3d⁵                              (D)  3d⁷

The metal ion which does not form coloured compound is

The transition metals mostly are

 Cuprous ion is colourless while cupric ion is coloured because

Which of the following is expected to form colourless complex

(A)  Ni²⁺                                (B)  Cu²⁺                             (C)  Ti³⁺                                 (D)  Fe³⁺

Which of the following forms colourless compound

(A)  Se⁺³                                (B)  V³⁺                                (C)  Ti³⁺                               (D)  Cr³⁺

Fe²⁺ shows

Which of the following is more paramagnetic

(A)  Fe⁺²                              (B)  Fe⁺³                              (C)  Cr⁺³                          (D)  Mn⁺³

Which ion is not coloured

(A)  Cr⁺³                                 (B)  Co²⁺                             (C)  Cr²⁺                             (D)  Cu⁺

In which of the following metallic bond is strongest

Which one of the following characteristics of the transition metals is associated with their catalytic activity

Which transition metal reduces steam to evolve hydrogen

The catalytic activity of the transition metals and their compounds is ascribed to their 

Complex ion is shown by

Which of the following transition metal is used as a catalyst

All the following statements about the transitional elements are true except that  

Ferrosilicon is used in steel industry as

Which of the following is not an element

Ionisation potential values of d-block elements as compared to ionization potential value of f-block elements are

Which metal does not give the following reaction, M + water or steam → oxide + H ↓

Which one is wrong in the following statements

 Which one of the following is an example of non-typical transition elements

The substance used in cancer therapy is

Zn is related to which group

In solution of AgNO₃ if Cu is a solution become blue due to

Super conductors are derived from compounds of

An elements is in Its electronic configuration is [Ar]3d¹ the ion is 

(A)  Ti³⁺                             (B)  Ti⁴⁺                              (C)  Ca²⁺                               (D)  Sc⁺

Assertion (A): cuprous ion (Cu⁺) has unpaired electrons while cupric ion does not

Reason (R): Cuprous ion (Cu⁺) is colourless where as cupric ion (Cu⁺⁺) is blue in the aqueous solution

Atomic number of Cr and Fe are 24 and 26 respectively. Which of the following is paramagnetic with the spin of electron

(A)  [Cr(NH₃)₆]⁺³                         (B)  [Fe(CO)₅]                     (C)  [Fe(CN)₆]^–4                            (D)  [Cr(CO)₆]

Transition metal with low oxidation number will act as

The higher number of unpaired electrons are in

(A)  Fe                               (B)  Fe⁺                              (C)  Fe⁺²                                 (D)  Fe⁺³

The atomic number 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

Which of the following transition metals can have highest oxidation state

Most common oxidation states of Cs (cesium) are

In the reduction of dichromate by Fe(II) the number of electrons involved per chromium atom is

Mn⁺⁺ can be converted into Mn⁷⁺ by reacting with

(A)  SO₂                                 (B)  Cl₂                               (C)  PbO₂                           (D)  SnCl₂

Which compound has coloured aqueous solution

(A)  Zn(NO₃)₂                            (B)  LiNO₃                            (C)  Co(NO₃)₂                    (D)  Ba(NO₃)₂

The basic character of the transition metal monoxides follows the order

(Atomic no. Ti = 22, V = 23, Cr = 24, Fe  = 26)

FeS₂ is

Which one of the following metalic hydroxides does not dissolve in sodium hydroxide solution

(A)  Zn(OH)₂                                (B)  Al(OH)₃                           (C)  Fe(OH)₃                         (D)  Pb(OH)₂

Iron loses magnetic property at

Red hot iron absorbs giving the product

(A)  FeS + O₂                       (B)  Fe₂O₃ + FeS                        (C)  FeO + FeS                      (D)  Feo + S

Which of the following elements does not form amalgam

Iron is extracted from magnetite by reduction with

Pure conc. HNO₃ makes iron passive as the surface is covered with protective layer of

(A)  Fe₂O₃                               (B)  FeO                               (C)  Fe₃O₄                              (D)  Fe(NO₃)₃

In smelting of iron, which of the following reactions takes place in Blast furnace at

(A)  CaO + SiO₂ → CaSiO₃                                                   (B)  2FeS + 3O₂  → 2Fe + SO₂ 

(C)  FeO + SiO₂ + FeSiO₃                                                     (D)  Fe₂O₃ + 3O → 2Fe + 3CO₂

Ferric alum has the composition (NH₄)₂SO₄Fe₂(SO₄)₃. xH₂O

The chemical processes in the production of steel from haematite ore involve

Carbon monoxide reacts with iron to form

(A)  Fe(CO)₅                           (B)  FeCO₂                              (C)  FeO + C                            (D)  Fe₂O₃ + C

Heat treatment alters the properties of steel due to

Stainless steel is an alloy of iron with

Matte contains mainly 

(A)  Cu₂S and FeS                              (B)  CuS and Fe₂S₃                           (C) Fe                       (D)  Cu₂S

A cuprous ore among the following is

Which of the following alloys contain only Cu and Zn

The alum used for purifying water is

When metallic copper comes in contact with moisture, a green powdery/ pasty coating can be seen over it. This is chemically known as

CuSO₄ when reacts with KCN forms CuCN, which is insoluble in water. It is soluble in excess of KCN due to the formation of

(A) CuCN₂                                                                 (B) K₃[Cu(CN)₄]
(C) Cu[KCu(CN)₄]                                                     (D) K₂[Cu(CN)₄]

CN^– solution used in extraction of which metal

Colourless solutions of the following four salts are placed separately in four different test tubes and a strip of copper is dipped in each one of these. Which solution will turn Blue

(A) KNO₃                             (B) AgNO₃                             (C) Zn(NO₃)₂                            (D) ZnSO₄

Parke’s process is used to extract

(A) Silver using NaCN
(B) Copper using CuFeS₂
(C) Silver from argentiferrous lead
(D) Silver by forming amalgam

The nitrate of which metal left globule on heating strongly

(A) Pb(NO₃)₂                                                    (B) NaNO₃
(C) AgNO₃                                                        (D) Cu(NO₃)₂

In the equation   The metal M is

Purple of Cassuim is

The metal used for making radiation shield is

Which of the following lead oxides is ‘Sindhur’

(A) PbO                         (B) PbO₂                            (C) Pb₂O₃                            (D) Pb₃O₄

Red lead in an example of a/an …. odixe

Lanthanum is grouped with f-block elements  because

Which of the following trivalent ion has the largest atomic radii in the lanthanide series

Which one of the following statements concerning lanthanides elements is false

]A reduction in atomic size with increase  in atomic number is a characteristic of elements of

Magnallium is an alloy of

Lanthanide contraction occurs because

Soil containing both Al and Fe is called 

Which of the following elements is alloyed with copper to form brass

Which one of the following statements is correct

(A) Manganese salts give violet borax bead test in the reducing flame
(B) From a mixed precipitate of AgCl and AgI ammonia solution dissolves only AgCl
(C) Ferric ions give a deep green precipitate on adding potassium ferrocyanide solution 
(D) On boiling a solution having K⁺, Ca²⁺ and HCO^–₃ ions we get a precipitate of K₂Ca(Co₃)₂

A group of acidic oxide is

(A)
(B) 
(C) 
(D) 

Lanthanide for which + II and + III oxidation states are common is

General configuration of outermost and penultimate shell is   .If n = 4 and x = 5 then no. of proton in the nucleus will be  

Cryolite helps in

Super alloys are usually

Collin’s reagent is 

(A)
(B) 
(C) 
(D) 

Most common oxidation states of CS  (cesium) are

An elements is in M³⁺  form. Its electronic configuration is [Ar]3d¹  the ion is 

(A) Ti³⁺                                  (B) Ti⁴⁺                                  (C) Ca²⁺                                (D) Sc⁺

Which of the following is not an element

Which of the following alloys is used for making magnets for hearing aids