Science 1 Test 5 :- Dr. Mujawar Sir

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| By DR MUJAWAR
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DR MUJAWAR
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Quizzes Created: 1 | Total Attempts: 137
| Attempts: 137
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  • 1/10 Questions

    Horizontal Rows in Mendeleev's Periodic table is called as ..............

    • Groups
    • Periods
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About This Quiz

This quiz, crafted by Dr. Mujawar, tests knowledge on Mendeleev's periodic table, focusing on its structure, base elements, and specific characteristics like Eka-Boron and the placement of Cobalt & Nickel.

Science 1 Test 5 :- Dr. Mujawar Sir - Quiz

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  • 2. 

    According to properties hydrogen wants to placed in which group?

    • Group 2

    • Group 2 and 5

    • Group 6

    • Group 1 and 7

    Correct Answer
    A. Group 1 and 7
    Explanation
    Hydrogen wants to be placed in group 1 and 7 because it has one electron in its outermost shell, similar to the elements in group 1, and it can also gain one electron to achieve a stable configuration, similar to the elements in group 7. Therefore, hydrogen exhibits properties of both group 1 and group 7 elements.

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  • 3. 

    How many groups are there in Mendeleev's periodic table?

    •  1

    • 4

    • 8

    • 7

    Correct Answer
    A. 8
    Explanation
    Mendeleev's periodic table consists of 8 groups. The groups in the periodic table are vertical columns that contain elements with similar chemical properties. Each group is labeled with a number and sometimes a letter to indicate its specific characteristics. Mendeleev's periodic table is organized based on the atomic number and the arrangement of elements in increasing order of atomic number. Each group represents a specific configuration of valence electrons, which determines the chemical behavior of the elements within that group. Therefore, the correct answer is 8.

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  • 4. 

    At the time of Mendeleev How many elements were discovered ?

    • 63

    • 118

    • 56

    • 30

    Correct Answer
    A. 63
    Explanation
    During the time of Mendeleev, a total of 63 elements were discovered. Mendeleev's periodic table, which he published in 1869, included these 63 elements arranged in order of increasing atomic weight. This table provided a framework for understanding the properties and relationships between different elements, and it also allowed for the prediction of the existence and properties of undiscovered elements.

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  • 5. 

    Which 2 elements in Mendeleevs table placed in same Place ?

    • Cobalt & Nickel

    • Carbon & Sodium

    • Cobalt & Chlorin

    • Aluminium & Magnesium

    Correct Answer
    A. Cobalt & Nickel
    Explanation
    Cobalt and Nickel are placed in the same place in Mendeleev's table because they both belong to the same group, which is Group 9. In the periodic table, elements in the same group have similar chemical properties and exhibit similar behaviors. Therefore, Cobalt and Nickel share certain characteristics and are placed together in the same location.

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  • 6. 

    Eka- Boron is further called as..............

    • Alluminium

    • Scandium

    • Germanium

    • Gallium

    Correct Answer
    A. Scandium
    Explanation
    Eka-Boron is a term used to describe an element that is predicted to have similar properties to Boron but has not yet been discovered. Scandium is the element that fits this description, as it is located directly below Boron in the periodic table and has similar chemical properties. Therefore, Scandium is the correct answer.

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  • 7. 

    In Mendeleev's Periodic Table Group 7 Belongs to................. Family.

    • Halogen

    • Noble Gas

    • Alkali

    • Alkaline earth metal

    Correct Answer
    A. Halogen
    Explanation
    In Mendeleev's Periodic Table, Group 7 belongs to the Halogen family. Halogens are highly reactive nonmetals that have 7 valence electrons, making them one electron short of a stable octet. They include elements such as fluorine, chlorine, bromine, iodine, and astatine. These elements readily form compounds with other elements, especially alkali metals, to achieve a stable electron configuration. Therefore, Group 7 is correctly identified as the Halogen family.

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  • 8. 

    Mendeleev's Periodic Table is based on ...........

    • Atomic Number

    • Atomic Size

    • Atomic Radius

    • Atomic Mass

    Correct Answer
    A. Atomic Mass
    Explanation
    Mendeleev's Periodic Table is based on atomic mass. Mendeleev arranged the elements in order of increasing atomic mass and observed that certain properties repeated at regular intervals. This led to the development of the periodic table, where elements with similar properties were grouped together. Although the modern periodic table is based on atomic number, Mendeleev's original table was based on atomic mass.

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  • 9. 

    ............... is the demerit of Mendeleev's Periodic Table.

    • Place of Hydrogen

    • Arraingment of elements

    • Blank places in table

    • None of above

    Correct Answer
    A. Place of Hydrogen
    Explanation
    The demerit of Mendeleev's Periodic Table is the placement of Hydrogen. Mendeleev initially placed Hydrogen in a separate group, but its properties do not match those of the elements in that group. Hydrogen can exhibit properties of both metals and non-metals, making its placement in the periodic table ambiguous. This inconsistency in the placement of Hydrogen is considered a demerit of Mendeleev's table.

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  • 10. 

    ............ is Merit of Mendeleev's Periodic Table.

    • No. of Elements

    • Atomic Size

    • Place for Noble Gas

    • Arriangment of elements

    Correct Answer
    A. Place for Noble Gas
    Explanation
    The merit of Mendeleev's Periodic Table is the inclusion of a dedicated place for Noble Gases. Mendeleev recognized the unique properties of these elements and their lack of reactivity, which did not fit into any existing group. By creating a separate group for Noble Gases, Mendeleev's periodic table provided a more comprehensive and organized representation of the elements, allowing for a better understanding of their properties and trends.

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  • Mar 15, 2023
    Quiz Edited by
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  • Apr 26, 2020
    Quiz Created by
    DR MUJAWAR
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