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NTSE Level Test: Periodic Classification of Elements - Class 10 MCQ


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20 Questions MCQ Test Science Class 10 - NTSE Level Test: Periodic Classification of Elements

NTSE Level Test: Periodic Classification of Elements for Class 10 2024 is part of Science Class 10 preparation. The NTSE Level Test: Periodic Classification of Elements questions and answers have been prepared according to the Class 10 exam syllabus.The NTSE Level Test: Periodic Classification of Elements MCQs are made for Class 10 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for NTSE Level Test: Periodic Classification of Elements below.
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NTSE Level Test: Periodic Classification of Elements - Question 1

Which of the following elements would lose an electron easily ?

Detailed Solution for NTSE Level Test: Periodic Classification of Elements - Question 1

As we move down a group in the periodic table, the tendency to lose electron increases.
Also when we move from left to right in a period, the tendency to lose electrons decreases. Combining these two results, K will lose the electron most easily.

NTSE Level Test: Periodic Classification of Elements - Question 2

Which of the following is non-metal and to which group does it belong?

Detailed Solution for NTSE Level Test: Periodic Classification of Elements - Question 2

Bromine is a non-metal, belongs to group 17.

NTSE Level Test: Periodic Classification of Elements - Question 3

Which one of the following depict the correct representation of atomic radius (r) of an atom ?



Detailed Solution for NTSE Level Test: Periodic Classification of Elements - Question 3

Atomic radius is the distance between the centre of the nucleus and the outermost shell which contains electrons in an isolated atom. Figure (ii) and (iii) are the correct representation of atomic radius from nucleus to the outermost shell.

NTSE Level Test: Periodic Classification of Elements - Question 4

Silicon (14) belongs to class of

Detailed Solution for NTSE Level Test: Periodic Classification of Elements - Question 4

It is metalloid.

NTSE Level Test: Periodic Classification of Elements - Question 5

According to Mendeleev’s Periodic Law, the elements were arranged in the periodic table in the order of

Detailed Solution for NTSE Level Test: Periodic Classification of Elements - Question 5

According to Mendeleev's periodic law , the properties of an elements are the function of their atomic masses...

This means that when elements are arranged in the order of increasing number of atomic masses , the properties of elements repeats after a period or intervals...

Read more on Brainly.in - https://brainly.in/question/7572773#readmore

NTSE Level Test: Periodic Classification of Elements - Question 6

Chlorine (17) belongs to which group and period

Detailed Solution for NTSE Level Test: Periodic Classification of Elements - Question 6

Cl (17) 2,8,7 belongs to group 17 and 3rd period.

NTSE Level Test: Periodic Classification of Elements - Question 7

Which of the following statement(s) about Modern Periodic Table are incorrect ?
(i) The elements in the Modem Periodic Table are arranged on the basis of their decreasing atomic number.
(ii) The elements in the Modem Periodic Table are arranged on the basis of their increasing atomic masses.
(iii) Isotopes are placed in adjoining group(s) in the Periodic Table.
(iv) The elements in the Modern Periodic Table are arranged on the basis of their increasing atomic number.

Detailed Solution for NTSE Level Test: Periodic Classification of Elements - Question 7

Only the statement (iv) that in the Modern Periodic Table, the elements are arranged on the basis of increasing atomic number.

NTSE Level Test: Periodic Classification of Elements - Question 8

Which of the following is most reactive

Detailed Solution for NTSE Level Test: Periodic Classification of Elements - Question 8

F2 is most reactive because it is smaller in size and can gain electron easily.

NTSE Level Test: Periodic Classification of Elements - Question 9

The concept of triads in the elements was given by

Detailed Solution for NTSE Level Test: Periodic Classification of Elements - Question 9

Dobereiner gave the concept of triads.

NTSE Level Test: Periodic Classification of Elements - Question 10

Which of the following is most reactive

Detailed Solution for NTSE Level Test: Periodic Classification of Elements - Question 10

K is most reactive due to larger size, can lose electron easily

NTSE Level Test: Periodic Classification of Elements - Question 11

Upto which element, the Law of Octaves was found to be applicable ?

Detailed Solution for NTSE Level Test: Periodic Classification of Elements - Question 11

The Law of Octave was found to be applicable upto calcium as after that every eighth element did not possess properties of the first element.

NTSE Level Test: Periodic Classification of Elements - Question 12

Which of the following set of elements is written in order of their decreasing metallic character ?

NTSE Level Test: Periodic Classification of Elements - Question 13

The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belong to the same group ?

Detailed Solution for NTSE Level Test: Periodic Classification of Elements - Question 13

Elements A and C belong to the same group because there is a difference o f 8 in the atomic number (F and Cl).

NTSE Level Test: Periodic Classification of Elements - Question 14

Which one of the following does not increase while moving down the group of the periodic table ?

NTSE Level Test: Periodic Classification of Elements - Question 15

Which of the following statements is not a correct statement about the trends when going from left to right across the periods of periodic table ?

Detailed Solution for NTSE Level Test: Periodic Classification of Elements - Question 15

The atoms lose the electrons less easily as we move from left to right in the periodic table because metallic character decreases.

NTSE Level Test: Periodic Classification of Elements - Question 16

The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?

NTSE Level Test: Periodic Classification of Elements - Question 17

Element X forms a chloride with formula XCl2 which is a solid with a high melting point. X would most likely be in the same group of the Periodic Table as ​

Detailed Solution for NTSE Level Test: Periodic Classification of Elements - Question 17

XCl2 indicates that it has a valency equal to 2. Magnesium and other elements in this group have the valency equal to 2.

NTSE Level Test: Periodic Classification of Elements - Question 18

Which of the following elements will form an acidic oxide ?

NTSE Level Test: Periodic Classification of Elements - Question 19

In Mendeleev’s Periodic Table, gaps were left for the elements to be discovered later. Which of the following elements found a place in the periodic table later ?

Detailed Solution for NTSE Level Test: Periodic Classification of Elements - Question 19

Germanium was discovered later.

NTSE Level Test: Periodic Classification of Elements - Question 20

Which of the following elements does not lose an electron easily ?

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