NEW ERA CHEMISTRY Textbook for Class X>Chapter 5 - Periodic Classification of Elements>MOCK TEST>Q 5

MEDIUM

10th CBSE

IMPORTANT

Earn 100

Nitrogen (atomic number $7$ ) and phosphorus (atomic number $15$ ) belong to the group $15$ of the periodic table. Write the electronic configuration of these two elements. Which of these will be more electronegative?

Important Questions on Periodic Classification of Elements

EASY

10th CBSE

IMPORTANT

NEW ERA CHEMISTRY Textbook for Class X>Chapter 5 - Periodic Classification of Elements>MOCK TEST>Q 6

The formula of the sulphate of the element (

X

) with atomic number

13

is

X_{2} {({SO}_{4})}_{m}

. What is the value of m?

EASY

10th CBSE

IMPORTANT

NEW ERA CHEMISTRY Textbook for Class X>Chapter 5 - Periodic Classification of Elements>MOCK TEST>Q 6

Name the element which requires the highest amount of energy to lose an electron.

MEDIUM

10th CBSE

IMPORTANT

NEW ERA CHEMISTRY Textbook for Class X>Chapter 5 - Periodic Classification of Elements>MOCK TEST>Q 7

Describe two anomalies of Mendeleev’s periodic classification of elements.

MEDIUM

10th CBSE

IMPORTANT

NEW ERA CHEMISTRY Textbook for Class X>Chapter 5 - Periodic Classification of Elements>MOCK TEST>Q 8

How does the electronic configuration of an atom of an element relate to its position in the modern periodic table?

MEDIUM

10th CBSE

IMPORTANT

NEW ERA CHEMISTRY Textbook for Class X>Chapter 5 - Periodic Classification of Elements>MOCK TEST>Q 9

Arrange the following in order of decreasing basic character:

MgO, K_{2} O, {Na}_{2} O, CaO

.

EASY

10th CBSE

IMPORTANT

NEW ERA CHEMISTRY Textbook for Class X>Chapter 5 - Periodic Classification of Elements>MOCK TEST>Q 9

Which of the following is amphoteric in nature?

A. ${Na}_{2} O$

B. ${Al}_{2} O_{3}$

C. ${SO}_{2}$

"Enter your correct answer as A, B or C."

EASY

10th CBSE

IMPORTANT

NEW ERA CHEMISTRY Textbook for Class X>Chapter 5 - Periodic Classification of Elements>MOCK TEST>Q 10

Is valency a periodic property? How does it vary along a period?

MEDIUM

10th CBSE

IMPORTANT

NEW ERA CHEMISTRY Textbook for Class X>Chapter 5 - Periodic Classification of Elements>MOCK TEST>Q 11

Consider the following elements:

Na, Ca, Al, Mg, K, Li

.
(a) Which of these elements belong to the same group of the periodic table?
(b) Which of these elements belong to the same period of the periodic table?