S Block Elements - पिछले 20 सालों के PYQs - NEET 2023 Chemistry?S-ब्लॉक के तत्त्व - Kamesh Sir

Class 11 NEET 2020 - Revision In 60 Days | Hydrogen & S Block Elements -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: Nickel is a transition element that belongs to group 10 and period 4 of the modern periodic table. Reason: Electronic configuration of Nickel is [Ar]_(18)3d^(8)4s^2

Read the passage given below and answer the following questions: 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 fshells 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 recognize properties of elements in Group VII are related 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. Assertion (A): Nickel is a transition element that belongs to group 10 and period 4 of the modern periodic table. Reason (R): Electronic configuration of Nickel is [Ar]_(18)3d^(8)4s^2

The bar graph shows the exports of Cars of Type A and B (in Rs millions). यह दंड आरेख A और B प्रकार की कारों का निर्यात ( दस लाख रुपये में) दर्शाता है | the average exports (per year) of cars of type A over the five years was 10% more than which year’s exports of the cars of type A ? पिछले पांच वर्षों में A प्रकार की कारों का औसत निर्यात ( प्रति वर्ष ) किस वर्ष A प्रकार की कारों के निर्यात से 10% अधिक था ?

JEE Mains 2020 - 30 Days Revision | S Block Elements-Quick Revision+Important Questions | Chemistry

The pie-chart given below shows the expenses incurred by various departments of a company. Each expense is shown as a percentage of the company.s total expenditure. The central angles shown in the pie-chart are not according to any selected scale. नीचे दिया गया वृत्त आरेख किसी कंपनी के विभिन्न विभागों द्वारा किए खर्चों को दर्शाता है | प्रत्येक खर्च को कंपनी के कुल व्यय के प्रतिशत के रूप में दर्शाया गया है | वृत्त आरेख में दर्शाए गए केंद्रीय कोण किसी चयनित पैमाने के अनुसार नहीं हैं | If the total expenses of the company is 20 lacs, then find the total expenses incurred on the departments D2, D4 and D5. यदि कंपनी के कुल खर्चे रु 20 लाख हैं, तो D2, D4 तथा D5 विभागों पर किया गया कुल खर्चा कितना है ?