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Test: Periodic Trends in Properties of Elements - NEET MCQ


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20 Questions MCQ Test Chemistry Class 11 - Test: Periodic Trends in Properties of Elements

Test: Periodic Trends in Properties of Elements for NEET 2024 is part of Chemistry Class 11 preparation. The Test: Periodic Trends in Properties of Elements questions and answers have been prepared according to the NEET exam syllabus.The Test: Periodic Trends in Properties of Elements MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Periodic Trends in Properties of Elements below.
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Test: Periodic Trends in Properties of Elements - Question 1

The element with lowest ionization energy among the following is:

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 1

When we go down in a group shell increase and size increase and due to large size of atom electron can easily be removed. Thats option is C.

Test: Periodic Trends in Properties of Elements - Question 2

Isoelectronic species have:

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 2

Isoelectronic are the species having same number of electrons.
A positive charge means the shortage of an electron.

Test: Periodic Trends in Properties of Elements - Question 3

The cause of periodicity of properties of elements is due to the repetition of similar:

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 3

The cause of periodicity of properties of elements is due to the repetition of similar electronic configuration of their atoms in the outermost energy shell after certain regular interval.

Test: Periodic Trends in Properties of Elements - Question 4

Tendency of an atom in a molecule to attract the shared pair of electron towards itself is called:

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 4

The tendency of an atom in a molecule to attract the shared pair of electrons towards itself is called its electronegativity.
Electronegativity is a dimensionless property since it is only a tendency. It only indicates the net result of the tendencies of different elements to attract the bond forming electron pair.

Test: Periodic Trends in Properties of Elements - Question 5

Identify the smallest ion among the following:​

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 5

Al3+ because they all have the same number of electrons, however Al3+ has the most protons and therefore greatest nuclear charge. In Al3+, the same number of electrons are being attracted by more protons in the nucleus, so the electrons are being pulled closer to the nucleus, reducing the size of the ionic radius.

Test: Periodic Trends in Properties of Elements - Question 6

Na+ is smaller than Na atom because:

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 6

According to the electronic configuration of sodium(Na),it has 1 valence electron(2,8,1).So it loses one electron to form a cation and becomes sodium cation (Na+).As it loses one electron ,the outermost shell has 0 electrons (i.e it gets eliminated ) and Na+ has only 2 shells. Hence, it lost one of its shell, the sodium ion is smaller than the sodium atom.

Test: Periodic Trends in Properties of Elements - Question 7

Electron gain enthalpy is most negative for:

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 7

The negative electron gain enthalpy of fluorine is less than that of chlorine. It is due to small size of fluorine atom. As a result, there are strong interelectronic repulsions in the relatively small 2p orbitals of fluorine and thus, the incoming electron does not experience much attraction.

Test: Periodic Trends in Properties of Elements - Question 8

Among the following the element with highest first ionization energy is:

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 8

Carbon has the highest first ionisation energy because ionisation energy decreases down the group and increases from left to right in a period.

Test: Periodic Trends in Properties of Elements - Question 9

Which of the following elements will have the largest atomic radius?

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 9

Strontium has the highest atomic radii because it on the group atomic radius increases also it belongs to 4D so if there is doubt of Lanthanide contraction then the size of 4D is largest followed by 3D and 5D has the smallest size.

Test: Periodic Trends in Properties of Elements - Question 10

For noble gases radius is measured as:

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 10

It is believed that Noble gases don't form (or rather don't easily form bonds). This way only Van der Waals radius is measured.

The rationale here is based on the fact that noble gases have very low chemical reactivity and their atomic radii are non bonded.

Test: Periodic Trends in Properties of Elements - Question 11

The electronegativity of following elements increases in the order of?

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 11

Si,P,C,N

Electronegativity increases along a period and decreases down the group.Nitrogen is expected to have maximum electronegativity.

Test: Periodic Trends in Properties of Elements - Question 12

Which of following statement is incorrect regarding ionization enthalpy:

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 12

The option (d) represents incorrect statement. It states that 
"Removal of electron from orbitals bearing lower n value is easier than from orbital having higher n value".
The correct statement is "Removal of electron from orbitals bearing lower n value is difficult than from orbital having higher n value".
The attraction between the nucleus and the electron present in orbital having lower n value is higher than the attraction between the nucleus and the electron present in orbital having higher n value.

Test: Periodic Trends in Properties of Elements - Question 13

Which of the following elements has the largest ionisation enthalpy?

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 13

Ionisation energy increases along a period. The very next elements C,N,O,F results F with higher ionisation energy.

Test: Periodic Trends in Properties of Elements - Question 14

Sum of atomic mass of all atoms present in one molecule of a molecular compound is

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 14

The mole concept, which we will introduce here, bridges that gap by relating the mass of a single atom or molecule in amu to the mass of a collection of a large number of such molecules in grams. As you learned, the mass number is the sum of the numbers of protons and neutrons present in the nucleus of an atom.

Test: Periodic Trends in Properties of Elements - Question 15

What happens to atomic radius on going from left to right in a period in a periodic table?

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 15

Atomic radius is generally decreases from left to right along a period because the electrons are added to same shell due to this they experience a great force from the nucleus. While atomic radiusincreases in group from top to bottom cause new shells are added and the electrons are bring away from the nucleus.

Test: Periodic Trends in Properties of Elements - Question 16

When an electron is added to neutral gaseous atom to convert it into a negative ion, the enthalpy change accompanying the process is called:

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 16

Electron affinity is defined as the change in energy (in kJ/mole) of a neutral atom (in the gaseous phase) when an electron is added to the atom to form a negative ion.

Test: Periodic Trends in Properties of Elements - Question 17

Which of the following is isoelectronic with F?​

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 17

F- is isoelectronic with Ne  both have 10 electrons

Test: Periodic Trends in Properties of Elements - Question 18

Among the following elements element with highest ionisation enthalpy is:

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 18

Among the given molecules, N2 has highest ionization enthalpy.The reason behind is the stability of half-filled orbitals which makes it more stable than other elements in the given option list.

Test: Periodic Trends in Properties of Elements - Question 19

The largest atomic radius among the following is of:

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 19

Atomic radius decreases along period, the very next elements K ,Ca has K has higher atomic radius.

Test: Periodic Trends in Properties of Elements - Question 20

Electron gain enthalpy values of noble gases are positive because:

Detailed Solution for Test: Periodic Trends in Properties of Elements - Question 20

Electron gain enthalpy values of noble gases are positive because they have stable electronic configuration and thus have no tendency to take additionalelectron.

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