Test: Modern Periodic Table Of Elements

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This mock test of Test: Modern Periodic Table Of Elements for Class 10 helps you for every Class 10 entrance exam. This contains 5 Multiple Choice Questions for Class 10 Test: Modern Periodic Table Of Elements (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Modern Periodic Table Of Elements quiz give you a good mix of easy questions and tough questions. Class 10 students definitely take this Test: Modern Periodic Table Of Elements exercise for a better result in the exam. You can find other Test: Modern Periodic Table Of Elements extra questions, long questions & short questions for Class 10 on EduRev as well by searching above.

QUESTION: 1

The most distinctive property of the noble gases is that they are:

A.
Unreactive
B.
Radioactive
C.
Metalloid
D.
Metallic

Solution:

The electronic structure of the noble gases is the basis for explaining why they are so unreactive.

QUESTION: 2

As we move from left to right in a period in modern periodic table, Atomic sizes of the elements generally

A.
increase
B.
decrease
C.
remain same
D.
approach zero

Solution:

On moving from left to right in a period, the chemical reactivity of elements first decreases and then increases.

On moving from left to right in a period, the number of valence electrons increases from 1 to 8.

On moving from left to right in a period, the atomic size decreases; the size of the atoms decreases.

QUESTION: 3

Element X forms a chloride with the formula XCl₂, which is a solid with high melting point. X would most likely be:

A.
Si
B.
Al
C.
Na
D.
Mg

Solution:

X = Mg

Because Mg has valency 2 and valency in a group remains the same.

When Mg combines with chlorine it forms MgCl2.

QUESTION: 4

The non-metals are present:

A.
On the right hand side of the periodic table.
B.
In the middle of the periodic table.
C.
In the centre of the periodic table.
D.
On the left hand side of the periodic table.

Solution:

Nonmetals are present on the right hand side of the periodic table. They are usually solids or gases at room temperature with low melting and boiling points (boron and carbon are exceptions). The only liquid non-metal is bromine. Most non-metals are brittle and are neither malleable nor ductile.

QUESTION: 5

In the Modern Periodic Table, if an element with atomic number ‘X’ is an inert gas, than an element with atomic number (X-1) will be placed in:

A.
Group 16
B.
Group 17
C.
Group 15
D.
Group 18

Solution:

All the Noble gases are placed in the group 18 and all elements are placed in the order of increasing atomic number. Therefore, the elements of atomic number before the Noble gas is placed in the before group of the period of Nobel gas which is group 17.