1. The alloy of copper that contain Zinc is

   1. Monel metal

   2. Bronze

   3. bell metal

   4. brass

2. Which of the following compounds is colourless?

   1. Fe³⁺

   2. Ti⁴⁺

   3. Co²⁺

   4. Ni²⁺

A mixture of TiCl₄ and trialkyl aluminium is _________

1. hydroformylation of obfine

2. Zeigler - Natta Catalyst

3. interstitial compounds

4. ferromagnetic

A white crystalline salt (A) react with dilute HCl to liberate a suffocating gas (B) and also forms a yellow precipitate . The gas (B) turns potassium dichromate acidified with dil H₂SO₄ to a green coloured solution(C).  A, B and C are respectively

1. Na₂SO₃, SO₂, Cr₂(SO₄)₃

2. Na₂S₂O₃, SO₂, Cr₂(SO₄)₃

3. Na₂S, SO₂,Cr₂(SO₄)₃

4. Na₂SO₄, SO₂, Cr₂(SO₄)₃

The general electronic configuration of 4f series of elements can be written as ___________

1. [Xe]4f^2-14 5d^0-46s²

2. [Xe]4f^2-145d^0-46s¹

3. [Xe] 4f^1-145⁰6s¹

4. [Xe]4f^2-145d^0-46s¹

The element corresponding to the electronic configuration [Rn]5f³ 6d¹7s² is _________

1. Neptunium

2. Plutonium

3. Uranium

4. Americium

Identify the paramagnetic species

1. Cu⁺

2. Cr⁺

3. MnO₄

4. Zn²⁺

The general electronic configuration of d-block elements can be written as __________

1. [Noble gas]n - 1d^1-10 ns^1-2

2. [Noble gas]n - 1d^-10 n^1-6

3. [Noble gas]n - 2 d¹⁰ ns^1-2

4. [Noble gas]n - 2 d¹⁰ ns^1-6

The electronic configuration of Sc is _____________

1. [Ar] 3d¹ 4s²

2. [Ar] 3d² 4S¹

3. [Ar] 3d⁵ 4S¹

4. [Ar] 3d³ 4S¹

MnO₄^- react with Br^- in alkaline P^H to give

1. BrO₃^- MnO₂

2. Br₂, MnO₄^2-

3. Br₂, MnO₂

4. BrO^-, MnO₄^2-

The trend in ionisation enthalpy of a transition element is not regular because,

1. removal of one electron alters the relative energies of 4s and 3d orbitals

2. due to different electronic configuration (stability)

3. Poor screening of 3p-orbital

4. due to decrease in effective nuclear charge

The colour of K₂Cr₂O₇ and Fe²⁺ ions are respectively due to

1. Crystal defects and charge transfer spectra

2. d-d transition and charge transfer spectra

3. Charge transfer spectra and crystal defects

4. Charge transfer spectra and d-d transition

Except ______________ all element from Rf to Cn, are synthetically prepared and have very low half life periods.

1. cadmium

2. actinium

3. yttrium

4. cadmium

Which of the following statement is correct for 3d-transition element?

1. All metals except Zn and Sc form 'MO' Oxide

2. All metals except Sc forms 'MO' Oxide

3. All metals except Zn forms 'MO' Oxide

4. All metals except Mn forms 'MO' Oxide

The most common oxidation state of actinoids is

1. +2

2. +3

3. +4

4. +6

________ has the highest electrical conductivity at room temperature.

1. Chromium

2. Copper

3. Silver

4. Cadmium

CrO₃ is coloured due to

1. Low l.E

2. Crystal defects

3. Charge transfer spectra

4. Unpaired electrons

Which of the following oxidation states is most common among the lanthanoids?

1. 4

2. 2

3. 5

4. 3

In black and white photography, the developed film is fixed by washing with ____________

1. Hypo solution

2. AgBr solution

3. Na₂S₄O₆ solution

4. FeC₂O₄ solution

Permanganate ion changes to ________ in acidic medium

1. MnO₄²⁻

2. Mn²⁺

3. Mn³⁺

4. MnO₂

The catalytic activity of transition metals is due to

1. the formation of a variety of oxidation states

2. the formation of intermediate products

3. the capability of forming interstitial compounds.

4. all the above

FeSO₄ on heating gives ____________

1. SO_² and O₂

2. SO₂ and SO₃

3. SO₂

4. SO₃

Which one of the following statements related to lanthanons is incorrect?

1. Europium shows +2 oxidation state

2. The basicity decreases as the ionic radius decreases from Pr to Lu.

3. All the lanthanons are much more reactive than aluminium

4. Ce⁴⁺ solutions are widely used as oxidising agents in volumetric analysis.

Which one of the following is not correct?

1. La(OH)₂ is less basic than Lu(OH)₃

2. In lanthanoid series ionic radius of Ln³⁺ ions decreases

3. La is actually an element of transition metal series rather than lanthanide series

4. Atomic radii of Zr and Hf are same because of lanthanide contract

Hybridisation of chromium ions and dichromate ions is

1. Sp²

2. Sp³d

3. both (a) and (b)

4. None of these

Electrode potential of M²⁺/M for Ni is abnormal because of _________

1. high lE₁ + E₂

2. high hydration energy

3. ΔH atomisation

4. Electronic configuration of Ni²⁺

Sometimes vessels made of copper or bronze show traces of green colour. This is due to the formation of ___________________

1. Cu(OH)₂

2. CuCO₃

3. Cu(OH)₂CuCO₃

4. Cu(OH)₂CuSO₄

Which one of the following ions has the same number of unpaired electrons as present in V³⁺?

1. Ti³⁺

2. Fe³⁺

3. Ni²⁺

4. Cr³⁺

Which of the following statements is not true?

1. on passing H₂S, through acidified K₂Cr₂O₇ solution, a milky colour is observed

2. Na₂Cr₂O₇ is preferred over K₂Cr₂O₇ in volumetric analysis

3. K₂Cr₂O₇ solution in acidic medium is orange in colour

4. K₂Cr₂O₇ solution becomes yellow on increasing the P^H beyond 7

The highest possible oxidation state shown by osmium in its compound is

1. +4

2. +6

3. +8

4. +10

Which of the following ions will exhibit colour inaqueous solutions?

1. SC³⁺(Z=21)

2. Ti³⁺(Z =22)

3. La³⁺(Z=57)

4. Lu³⁺(Z=71)

Value of magnetic moment of a divalent metal ion is, 5.92 BM. Total number of electron in its atom would be ______________

1. 24

2. 25

3. 26

4. 27

1. The number of moles of acidified KMnO₄ required to oxidize 1 mole of ferrous oxalate(FeC₂O₄) is

   1. 5

   2. 3

   3. 0.6

   4. 1.5

2. the catalytic behaviour of transition metals and their compounds is ascribed mainly due to

   1. their magnetic behaviour

   2. their unfilled d orbitals

   3. their ability to adopt variable oxidation states

   4. their chemical reactivity

In chromyl chloride test, A ___________ precipitate of lead chromate is obtained.

1. White

2. red

3. yellow

4. blue

Equivalent weight of KMnO₄ in acidic medium is ___________

1. 3.16

2. 31.6

3. 158

4. 52.67

Which of the following is coloured due to charge transfer?

1. MnO₄^-

2. CrO₄^2-

3. Cu₂O

4. All of these

1. In acid medium, potassium permanganate oxidizes oxalic acid to

   1. oxalate

   2. Carbon dioxi

   3. acetate

   4. acetic acid

2. Which of the following d block element has half filled penultimate d sub shell as well as half filled valence sub shell?

   1. Cr

   2. Pd

   3. Pt

   4. none of these

Ce (Z=58) and Yb (Z=70) exhibits stable +4 and +2 oxidation states respectively. This is because

1. Ce⁴⁺ and Yb²⁺acquire f⁷ configuration

2. Ce⁴⁺ and Yb²⁺ acquire f⁰ configuration

3. Ce⁴⁺ and Yb²⁺acquire f⁷ and f¹⁴ configuration

4. Ce⁴⁺and Yb²⁺ acquire f⁰ and f¹⁴ configuration

Most of the transition metal ions are coloured, because of the

1. presence of unpaired electrons

2. energy gap between two energy levels is very small

3. both (a) and (b)

4. neither (a) nor (b)

If the standard electrode potential (E^o) of a inetal is ____________ and ______________ the metal is a powerful reducing agent.

1. large, negative

2. large, positive

3. small, negative

4. small, positive

Oxygen stabilises higher oxidation state because

1. it is electronegative

2. of its tendency to form multiple bond

3. of large size

4. of small size

Why Zn²⁺ salts are white while Ni²⁺ salts are coloured?

Why Europium (II) is more stable than Cerium (II)?

1. Explain the variation in E⁰_{M³⁺/M²⁺}  3d series.

2. What is lanthanide contraction and what are the effects of lanthanide contraction?

What are inner transition elements?

Comparing La(OH)₃ and Lu(OH)₃, which is more basic and explain why?

What are interstitial compounds?

Why first ionization enthalpy of chromium is lower than that of zinc?

What are interstitial compounds?

Which metal in the 3d series exhibits +1 oxidation state most frequently and why

Compare lanthanides and actinides

Why do transition metals have high enthalpy of hydration?

Which is stronger reducing agent Cr+ or Fe²⁺?

Transition metals show high melting points why?

Describe the variable oxidation state of 3d series elements.

Justify the position of lanthanides and actinides in the periodic table.

Calculate the magnetic moment of Fe³⁺ ion (Atomic no. of Fe = 26)

Write ionic equation for the reaction between Cr₂O₇^-2 iODSand Fe²⁺ ions in acidic medium.

Why is Ce⁴⁺ in aqueous solution is a good oxidising agent?

1. Out of Lu(OH)₃ and La(OH)₃ which is more basic and why?

2. What are interstitial compounds?

Why Europium (II) is more stable than Cerium (II)?

Why lanthanoids are called f block elements?

Give the general electronic configuration of actinoides?

Justify the position of lanthanides and actinides in the periodic table.

Actinoid contraction is greater from element to element than the lanthanoid contraction, why?

Describe the preparation of potassium dichromate.

What are actinides? Give three examples.

Why Gd³⁺ is colourles?

Why do zirconium and Hafnium exhibit similar properties?

1. Which is more stable? Fe³⁺ or Fe²⁺ - explain.

2. Describe the preparation of potassium dichromate.

Which is stronger reducing agent Cr²⁺ or Fe²⁺?