250+ TOP MCQs on Periodic Table Classification – Nomenclature of Elements with Atomic Numbers > 100 and Answers

Chemistry online test on “Periodic Table Classification – Nomenclature of Elements with Atomic Numbers > 100”.

1. Which of the following is not the name of the 104th element?
a) Rutherfordium
b) Kurchatovium
c) Unnilquadium
d) Neptunium
Answer: d
Clarification: For claiming credit for discovering 104th element, the Americans named it Rutherfordium and the Soviets named it Kurchatovium. While it’s named Unnilquadium as per IUPAC nomenclature. Neptunium is the 93rd element.

2. In olden days, as a privilege to the discoverer, the elements were named as they suggested by IUPAC.
a) True
b) False
Answer: a
Clarification: Traditionally, IUPAC ratified the name selected by the discoverer. But later this led to the problem because the synthesis of these elements required costly equipment and laboratory as the elements with higher atomic numbers are highly unstable.

3. The element ____________ is also known as Unnilunium.
a) Nobelium
b) Mendelevium
c) Hassium
d) Flerovium
Answer: b
Clarification: As per the notations of the IUPAC nomenclature, the 101st element is named as Unnilunium. When the Einstenium was bombarded with alpha particles, Mendelevium was discovered and named after Dmitri Mendeleev.

4. What’s the name of the 109th element as per the nomenclature?
a) Unnilennium
b) Unnilunium
c) Ununnillium
d) Ununennium
Answer: a
Clarification: As per IUPAC nomenclature, 0 – nil, 1 – un, 2 – bi, 3 – tri, 4 – quad, 5 – pent, 6 – hex, 7 – sept, 8 – oct and 9 – enn. Here it’s 109 so 1 – un, 0 – nil and 9 – enn, combining them its unnilennium (adding “-ium” after it).

5. What’s the symbol of the element Unnilquadium?
a) Unl
b) Unq
c) Uns
d) Ubn
Answer: b
Clarification: Unnilquadium is a combination of un, nil, and quad i.e. 1, 0 and 4 as per IUPAC nomenclature. Its symbol is formed by joining the first letters. So combining u from uni, n from nil and q from quad, we get Unq.

6. For the 115th element _________ is the name as per IUPAC nomenclature and __________ is the official name.
a) Unnilquadium, Mendelevium
b) Unnilunium, Rutherfordium
c) Ununpentium, Moscovium
d) Moscovium, Ununpentium
Answer: c
Clarification: As per IUPAC nomenclature, the roots are as follows: 0 – nil, 1 – un, 2 – bi, 3 – tri, 4 – quad, 5 – pent, 6 – hex, 7 – sept, 8 – oct and 9 – enn. So 115 is Ununpentium and the official name is Moscovium was named after the Moscow Oblast in which Joint Institute for Nuclear Research is situated.

7. The elements, Unnilhexium and Seaborgium are the same.
a) True
b) False
Answer: a
Clarification: Unnilhexium is the 106th element as per IUPAC nomenclature, as the roots are un, nil, and hex which means 1, 0 and 6. The 106th element’s official name is Seaborgium. Seaborgium is a synthetic element that is named after Glenn T. Seaborg.

8. What’s the atomic number of the element Copernicium?
a) 111
b) 112
c) 113
d) 114
Answer: b
Clarification: The element of Copernicium’s atomic number is 112. it is otherwise called as Ununbium as per the IUPAC nomenclature. The name Copernicium is given after the astronomer Nicolaus Copernicus. It’s a d-block transactinide element that belongs to Group-12.

9. What are the roots of 1, 1, and 9 respectively as per the IUPAC nomenclature, and find out its symbol?
a) un, bi, and quad; Ubq
b) nil, bi, and sept; Ubs
c) un, un, and enn; Uue
d) un, bi, and enn; Ube
Answer: c
Clarification: As per IUPAC nomenclature, the roots are as follows: 0 – nil, 1 – un, 2 – bi, 3 – tri, 4 – quad, 5 – pent, 6 – hex, 7 – sept, 8 – oct and 9 – enn. So the roots for 1, 1 and 9 are un, un, and enn. Hence the symbol of the elements is Uue.

10. What is the atomic number of the element unniloctium?
a) 106
b) 118
c) 108
d) 116
Answer: c
Clarification: As per IuPAC nomenclature of periodic elements greater than 100, Un means 1, nil means 0 and oct means 8, so the element numbered 108 is unniloctium. It’s chemical names is Hassium and is represented by the symbol “Hs”. It is highly radioactive in nature and man made.

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250+ TOP MCQs on States of Matter – Gaseous State and Answers

Chemistry Multiple Choice Questions on “States of Matter – Gaseous State”.

1. What is the lowermost layer of the earth?
a) stratosphere
b) troposphere
c) ionosphere
d) mesosphere
Answer: b
Clarification: It is the lowest layer of the earth’s atmosphere and is held to the earth by the gravitational force. It is very vital for human life and it protects us from harmful radiation. It contains important molecules like dioxygen, carbon dioxide, water vapor, etc.

2. Which of the following statement is true regarding gases?
a) gases are highly incompressible
b) gases exert equal pressure on each and every direction
c) its volume and shape is fixed
d) gases have the highest density among the 3 States of matter
Answer: b
Clarification: The correct statement is that gases exert equal pressure on each and every direction. Among the given options the corrected statements of other options are that gases are highly compressible, they occupy the shape and volume of the container as they have no fixed shape and volume and also that they have the least density among the three states of matter.

3. Which of the following element is not a gas?
a) Hydrogen
b) Oxygen
c) Mercury
d) Nitrogen
Answer: c
Clarification: Mercury is not a gas, it is a liquid in room temperature and it is a metal. There are 11 gases which are gases at room temperature they are hydrogen, Nitrogen, Oxygen, fluorine, chlorine, Helium, Neon, Argon, Krypton, Xenon, and Radon.

4. Gases have low density than that of solids and liquids because of __________
a) no thermal energy
b) higher intermolecular energy
c) both intermolecular energy and thermal energy are the same
d) higher thermal energy
Answer: d
Clarification: In gases, there is less amount of intermolecular energy and higher amount of thermal energy. As we know that thermal energy separates some molecules from one another so gases have low density than that of solids and liquids.

5. Gases mix properly without any mechanical aid.
a) true
b) false
Answer: a
Clarification: As the forces of interaction between molecules of a gas is negligible when compared with solids and gases. They mix properly because of higher thermal energy and lower intermolecular energy, so the above statement is true.

6. Which of the following is not a gas law?
a) Boyle’s law
b) Charles law
c) Hooks law
d) Gay lussac’s law
Answer: c
Clarification: Boyle’s law is about the relationship between pressure and volume while Charles law about temperature and volume. Gay lussac’s law is about pressure-temperature relationship & hooks law is a law that is in Physics relating to stress.

7. What is the percentage of Nitrogen in the atmosphere approximately?
a) 78.09
b) 21
c) 20
d) 32
Answer: a
Clarification: That composition of earth’s atmospheric gases is as follows; 78.09 percent of Nitrogen, 24.95 percent of oxygen, 0.93 percent of argon, 0.04 percentage of carbon dioxide and a small amount of water vapor and other gases in the atmosphere.

8. What can you say about particles motion in gases?
a) only vibratory
b) very slow
c) both vibratory and irregular
d) too Rapid and random
Answer: d
Clarification: A particle’s motion in the gaseous state is too rapid and random while in solids it’s restricted to vibratory motion and in liquids, it’s very slow. This is one of the very basic properties of substances in the gaseous state.

9. How many moles of oxygen are present in 64 grams of oxygen?
a) three moles
b) two moles
c) one mole
d) 16 moles
Answer: b
Clarification: As we know that the number of moles of a gas is given by the amount of the substance in weight divided by the molecular weight of the substance. So in case of oxygen, it is 64 grams divided by 32 grams and that is two moles.

10. At STP conditions how much volume does one mole of a gas comprise of _________
a) 22.4 liters
b) 24 liters
c) depends on the molecular weight of the gas
d) depends on some other conditions
Answer: a
Clarification: Every one Mole of gas at STP consists of 22.4 liters of volume, that is at 0° Celsius of temperature and one-atmosphere pressure or 76 mm of Mercury pressure. Also, note that one mole of a gas is the amount of gas in weight divided by the molecular weight of the gas.