Periodic Table Questions with solutions MCQs

1. Elements are generally available in the earth`s crust. Which of the following is a man-made element that is not available naturally in the earth`s crust?

A

Uranium

B

Thorium

C

Nobelium

D

Moylbednum

Periodic Table General Science
Correct Answer : C
Explanation :

Nobelium is a synthetic chemical element with the symbol No and atomic number 102. It is named in honor of Alfred Nobel, the inventor of dynamite and benefactor of science. A radioactive metal, it is the tenth transuranic element and is the penultimate member of the actinide series.

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2. Which of the following series of lines in the atomic structure of hydrogen atom appear in the visible region?

A

Lyman

B

Paschen

C

Brackett

D

Balmer

Periodic Table General Science
Correct Answer : D
Explanation :

Lyman series of hydrogen atom lies in ultraviolet region, Balmer series lies in visible region while Pfund and Paschen series lie in infrared region.

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3. When a hydrogen atom is raised from ground state to excited state

A

Potential energy decreases, kinetic energy increases

B

Potential energy increases, kinetic energy decreases

C

Both potential energy and kinetic energy decreases

D

Absorption spectrum

Periodic Table General Science
Correct Answer : B
Explanation :

when a hydrogen atom is raised from ground state to excited state, its potential energy increases whereas kinetic energy decreases.

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4. The atomic number of sodium is 11 and its mass number is 23. It has

A

11 neutrons and 12 protons

B

12 protons and 11 electrons

C

11 electrons and 12 neutrons

D

12 electrons and 11 neutrons

Periodic Table General Science
Correct Answer : C
Explanation :

The atomic number of sodium is 11 that means the number of protons in sodium is 11 and also the number of electrons in sodium is 11 . And the mass number of sodium is 23 that means the total number of protons and neutrons in sodium is 23 . That is, the number of neutrons in the sodium is 12 .

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5. German Silver is an alloy of which of the following metals?

A

Aluminium and Tin

B

Copper and Silver

C

Iron , Silver and Tin

D

Copper, Zinc and Nickel

Periodic Table General Science
Correct Answer : D
Explanation :

German Silver is an alloy of copper, zinc and nickel, sometimes also containing lead and tin. It was originally named for its silver white colour, but the term silver is now prohibited for alloys not containing that metal

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6. Identify the INCORRECT match between the element and its corresponding chemical symbol

A

Calcium - Ca

B

Aluminium - Al

C

Sodium - So

D

Chlorine - Cl

Periodic Table General Science
Correct Answer : C
Explanation :

Sodium - Na

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7. Electronic configuration of sodium is

A

8,2,1

B

2,1,8

C

2,8,1

D

1,8,2

Periodic Table General Science
Correct Answer : C
Explanation :

In this notation, the electronic configuration of sodium would be distributed in the orbitals as 2-8-1.

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8. The gas which is stable without octet configuration is

A

Argon

B

Helium

C

Radon

D

Neon

Periodic Table General Science
Correct Answer : B
Explanation :

Helium has two electrons. Its electronic configuration is 1s2. So it does not have complete octet.

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9. Isotones is defined as the atoms of different elements containing same number of

A

electrons

B

protons

C

neutrons

D

nucleons

Periodic Table General Science
Correct Answer : C
Explanation :

Isotone, any of two or more species of atoms or nuclei that have the same number of neutrons. Thus, chlorine-37 and potassium-39 are isotones, because the nucleus of this species of chlorine consists of 17 protons and 20 neutrons, whereas the nucleus of this species of potassium contains 19 protons and 20 neutrons

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10. Graphite is a good conductor of electricity. It is because

A

Linear structure

B

tetrahedral structure

C

trigonal planer structure

D

hexagonal multilayer structure

Periodic Table General Science
Correct Answer : D
Explanation :

Since graphite is a crystalline solid it can be defined by a basic unit cell. Graphite is hexagonal and therefore is defined by a hexagonal unit cell. ... Since each unit cell contains “centered” and “edge” carbon atoms the unit cell is considered a “centered” unit cell as opposed to a primitive unit cell.

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11. Which of the following fuels has the highest calorific value?

A

Liquified Petroleum Gas

B

Hydrogen

C

Methane

D

Compressed Natural Gas

Periodic Table Health Educator set 1
Correct Answer : B
Explanation :

Calorific value is nothing but the energy contained in a fuel or food, determined by measuring the heat produced by the complete combustion of a specified quantity of it. This is now usually expressed in joules per kilogram. Hence, hydrogen has the highest calorific value.

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12. Isotone are species of atoms that have the same number of __________.

A

Neutrons

B

Positrons

C

Protons

D

Electrons

Periodic Table Health Educator Set 2
Correct Answer : A
Explanation :

Isotone, any of two or more species of atoms or nuclei that have the same number of neutrons. Thus, chlorine-37 and potassium-39 are isotones, because the nucleus of this species of chlorine consists of 17 protons and 20 neutrons, whereas the nucleus of this species of potassium contains 19 protons and 20 neutrons.

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13. Which of the following is a non metal that remains liquid at room temperature:

A

Phosphorous

B

Bromine

C

Chlorine

D

Helium

Periodic Table Accounts Assistant LAHDC
Correct Answer : B
Explanation :

Mercury exists as liquid at room temperature, but bromine is a non metal which is liquid at room temperature.

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