04 NCERT Que /ans d-Block elements | Properties | for 12th , NEET, IIT JEE | In Hindi

Class 12 NEET 2020 - Revision In 60 Days | D and F Block Elements Part 1 -Quick Revision | NEET Chemistry | Important Questions

Class 12 NEET 2020 - Revision In 60 Days | P Block Elements Part 2 -Quick Revision | NEET Chemistry | Important Questions

Class 12 NEET 2020 - Revision In 60 Days | P Block Elements Part 3 -Quick Revision | NEET Chemistry | Important Questions

What are the d- block elements? Write any four properties of d - block elements and give their general outer electronic configuration.

Class 12 NEET 2020 - Revision In 60 Days | D and F Block Elements (Potassium Dichromate) -Quick Revision | NEET Chemistry | Important Questions

Read the passage given below and answer the question: The d block elements are the 40 elements contained in the four rows of ten columns (3-12) in the periodic table. As all the d block elements are metallic, the term d-block metals is synonymous. This set of d-block elements is also often identified as the transition metals, but sometimes the group 12 elements (zinc, cadmium, mercury) are excluded from the transition metals as the transition elements are defined as those with partly filled d or f shells in their compounds. Inclusion of the elements zinc, cadmium and mercury is necessary as some properties of the group 12 elements are appropriate logically to include with a discussion of transition metal chemistry. The term transition element or transition metal appeared to derive from early studies of periodicity such as the Mendeleev periodic table of the elements. His horizontal table of the elements was an attempt to group the elements together so that the chemistry of elements might be explained and predicted. In this table there are eight groups labeled I-VIII with each subdivided into A and B subgroups. Mendeleev recognized that certain properties of elements in Group VIII are related to those of some of the elements in Group VII and those at the start of the next row Group I. In that sense, these elements might be described as possessing properties transitional from one row of the table to the next. (source: Winter, M. J. (2015). D- block Chemistry (Vol. 27). Oxford University Press, USA.) In the following question, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the choices on the basis of the above passage. Assertion: All d block elements are metallic in nature. Reason: The d-block elements belong to Group 3 -12 of the periodic table.

Compounds OF d block element FeSO4.7H2O||CuSO4.5H2O||AgNO3|| Properties OF Lanthanoids and Actinoids

The correct statement(s) from among the following is/are? (i). all the d and f-block elements are metals (ii). all the d and f-block elements form coloured ions (iii). All th d- and f-block elements form paramagnetic ions

Trends in periodic properties of d-block elements: 1- atomic size | 2- Ionosation energy ( only trend)

The (n-1)d shell of electron in d-block elements is expanding and, therefore they have many physical and chemical properties in common. They show variable oxidation state and all are metals. The transition element i.e., d-block element show an unparallel tendency to form coordination compound with thhose groups which are able to donate an electron pair (i.e. lewis base). Which of the following statement is incorrect?