Lakhmir Singh & Manjit Kaur Test: Periodic Classification of Elements - Class 10 MCQ

Lakhmir Singh & Manjit Kaur Test: Periodic Classification of Elements - Class 10 MCQ

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10 Questions MCQ Test - Lakhmir Singh & Manjit Kaur Test: Periodic Classification of Elements

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Lakhmir Singh & Manjit Kaur Test: Periodic Classification of Elements - Question 1

Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period ?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Periodic Classification of Elements - Question 1

At no. of elements a,b,c,d,e are 2,3,7,10,30Elements b , c , d belongs to the same period because the no. of valence shells are all 2. Elements B (Li), C (N) and D (Ne) belong to the same group.

Lakhmir Singh & Manjit Kaur Test: Periodic Classification of Elements - Question 2

Which among the following elements has the largest atomic radii ?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Periodic Classification of Elements - Question 2

Atomic radii increases as you move left to right or down the columns of the periodic table. Within a period of elements, each new electron is added to the same shell. When an electron is added, a new proton is also added to the nucleus, which gives the nucleus a stronger positive charge and a greater nuclear attraction. So as more electrons are added, the total radius of the atom increases. And so out of all the options, potassium (K) has the largest atomic radii.

Lakhmir Singh & Manjit Kaur Test: Periodic Classification of Elements - Question 3

Which of the following is the outermost shell for elements of period 2 ?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Periodic Classification of Elements - Question 3

For the second period elements, L-shell is the outermost shell.

Lakhmir Singh & Manjit Kaur Test: Periodic Classification of Elements - Question 4

Which of the following gives the correct increasing order of the atomic radii of O, F and N ?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Periodic Classification of Elements - Question 4

Moving from right to left the periodic table metallic character increases and if metallic character increase atomic size will also increase as a result atomic radii increase.

Lakhmir Singh & Manjit Kaur Test: Periodic Classification of Elements - Question 5

Where would you locate the element with electronic configuration 2, 8 in the Modern Periodic Table ?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Periodic Classification of Elements - Question 5

Group 18, the element is Neon. It belongs to group 18.

Lakhmir Singh & Manjit Kaur Test: Periodic Classification of Elements - Question 6

Which one of the following elements exhibit the maximum number of valence electrons ?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Periodic Classification of Elements - Question 6

The greater the valency of the element, the greater is its unreactivity. Also, the valency in a period increases from the left to the middle, then again decreases from middle to the right. So we can say that the unreactive elements are located in the center of the period. Since phosphorus and Silicon are located at the center, they have the highest number of Valence electrons, and hence are the most unreactive in the period.

Lakhmir Singh & Manjit Kaur Test: Periodic Classification of Elements - Question 7

Which of the following statements about the Modern Periodic Table is correct ?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Periodic Classification of Elements - Question 7

Modern periodic table has 18 vertical columns known as groups.

Lakhmir Singh & Manjit Kaur Test: Periodic Classification of Elements - Question 8

The elements of group 16 are called

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Periodic Classification of Elements - Question 8

The group 16 elements of modern periodic table consist of 5 elements oxygen, sulphur, selenium, tellurium and polonium. The elements in this group are also known as the chalcogens.

Lakhmir Singh & Manjit Kaur Test: Periodic Classification of Elements - Question 9

Arrange the following elements in the order of their increasing non-metallic character
Li, O, C, Be, F

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Periodic Classification of Elements - Question 9

This is the correct order of increasing non-metallic character.

Lakhmir Singh & Manjit Kaur Test: Periodic Classification of Elements - Question 10

Which of the following is correct order of atomic size

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Periodic Classification of Elements - Question 10

Trend of atomic size is :-
In period it decreases due to large Electronegativity . In group it increases due to low  Electronegativity. According to this order, option ( b) is correct.

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