D and F - Block...

Atomic number of second transition series lies from

Which has lower standard reduction potential (SRP) value?

An element has configuration 4d⁵5s². The element belongs to

The electronic configuration of palladium is

Which has lowest and highest first ionisation enthalpy in 3d series?

The electronic configuration of the element which is just above the element with atomic number 42 in the same group

Which one of the following exists in the oxidation state other than +3?

Electronic configuration of a transition element X in +3 oxidation state is [Ar] 3d⁵ and Y in +2 state is [Ar] 3d⁸. What are the atom ic numbers of the elements?

The atomic radii of Cu and Ag are 1.17 Å and 1.34 Å. The atomic radius of gold is expected to be

A red solid is insoluble in water. However, it becomes soluble if some KI is added to water. Heating the red solid in a test tube results in liberation of some violet coloured fumes and droplets of a metal appear on the cooler parts of the test tube. The red solid is  

Identify the pairs in which one covalent radii of elements are almost similar.

Which one is of the following is the lightest transition element?

Which of the following have pseudo noble gas configuration?

Which one of the following is a diamagnetic ion?

The number of unpaired electrons in gaseous species of Mn³⁺, Cr³⁺ and V³⁺ respectively are:

Passage

The atomic and ionic radii for transition elements are smaller than their corresponding s-block elements and are greater than their corresponding p-block elements. The atomic and ionic radii transition elements for a given series show decreasing trend for first elements constant in the middle and slight increase towards the end. This is due to the combined effect of increasing effective nuclear charge and increasing screening effect along the period.
The atomic and ionic radii of 4d series are greater than 3d series. However, the elements of 4d series and 5d series have almost similar sizes due to lanthanide contraction. Transition elements have low atomic volumes, high densities, high melting points.

Q. Which pair of elements has nearly same atomic size? 

Passage

The atomic and ionic radii for transition elements are smaller than their corresponding s-block elements and are greater than their corresponding p-block elements. The atomic and ionic radii transition elements for a given series show decreasing trend for first elements constant in the middle and slight increase towards the end. This is due to the combined effect of increasing effective nuclear charge and increasing screening effect along the period.
The atomic and ionic radii of 4d series are greater than 3d series. However, the elements of 4d series and 5d series have almost similar sizes due to lanthanide contraction. Transition elements have low atomic volumes, high densities, high melting points.

Q. The metal with high melting point in 3d series is

Matching List Type

Choices for the correct combination of elements from Column I and Column II are given as options (a), (b), (c) and (d), out of which one is correct.

Q. 

Match the Column I with Column II and mark the correct option from codes given below.

Which one of the following ions exhibits colour in aqueous solution

Gun metal is an alloy of:

Which one of the following elements shows the maximum number of different oxidation states in its compounds?

When potassium ferrocyanide crystals are heated with concentrated sulphuric acid, the gas evolved is

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

During the process of electrolytic refining of copper, some metals present as impurity settle as ‘anode mud’ These are

Statement I : The highest oxidation state of osmium is +8.

Statement II : Osmium is a 5-d block element.