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12th Class Chemistry Chapter 1 MCQs with Answers

12th Class Chemistry Chapter 1 MCQs

Welcome to the 12th Class Chemistry Chapter 1 MCQs Practice and Quiz Tests. We are presenting you with top MCQ questions from the 12th Class Chemistry Chapter 1 Periodic Classification Of Elements & Periodicity.

You can find all the 12th Class Chemistry Chapter 1 MCQs online tests on our website. These online tests are great for learning and as well as for scoring maximum marks in your Intermediate Exams. We are making these Class 12 Chemistry MCQs online tests for those who want full marks in their exams.

Which scientist is credited with the development of the modern periodic table?
a) Dmitri Mendeleev
b) Isaac Newton
c) Albert Einstein
d) Niels Bohr

Answer
a) Dmitri Mendeleev

Elements in the modern periodic table are arranged in order of increasing:
a) Atomic number
b) Atomic mass
c) Electronegativity
d) Number of electrons

Answer
a) Atomic number

The vertical columns in the periodic table are called:
a) Rows
b) Periods
c) Groups
d) Families

Answer
c) Groups

How many periods are there in the modern periodic table?
a) 5
b) 7
c) 8
d) 18

Answer
b) 7

The elements in the same group have:
a) The same number of valence electrons
b) The same atomic number
c) The same atomic mass
d) The same number of protons

Answer
a) The same number of valence electrons

Which group in the periodic table contains noble gases?
a) Group 1
b) Group 2
c) Group 17
d) Group 18

Answer
d) Group 18

The elements in Group 1 of the periodic table are also known as:
1
a) Alkali metals
b) Halogens
c) Transition metals
d) Noble gases

Answer
a) Alkali metals

Which element has the symbol “Fe” in the periodic table?
a) Fluorine
b) Iron
c) Francium
d) Phosphorus

Answer
b) Iron

The elements in Group 17 of the periodic table are also known as:
a) Alkaline earth metals
b) Noble gases
c) Halogens
d) Lanthanides

Answer
c) Halogens

The element with atomic number 1 is:
a) Hydrogen
b) Helium
c) Lithium
d) Sodium

Answer
a) Hydrogen

Which of the following elements is a transition metal?
a) Sodium
b) Zinc
c) Fluorine
d) Carbon

Answer
b) Zinc

The atomic size generally increases as you move:
a) Up a group and right across a period
b) Down a group and right across a period
c) Up a group and left across a period
d) Down a group and left across a period

Answer
d) Down a group and left across a period

Which group contains elements with filled valence electron shells?
a) Alkali metals (Group 1)
b) Alkaline earth metals (Group 2)
c) Halogens (Group 17)
d) Noble gases (Group 18)

Answer
d) Noble gases (Group 18)

Elements in the same group have similar:
a) Atomic numbers
b) Chemical properties
c) Mass numbers
d) Electron configurations

Answer
b) Chemical properties

Which of the following elements is a metalloid?
a) Sodium
b) Bromine
c) Silicon
d) Fluorine

Answer
c) Silicon

The element with the highest electronegativity value is:
a) Hydrogen
b) Fluorine
c) Oxygen
d) Carbon

Answer
b) Fluorine

Which of the following elements is a halogen?
a) Helium
b) Nitrogen
c) Chlorine
d) Potassium

Answer
c) Chlorine

Elements in Group 2 of the periodic table are known as:
a) Noble gases
b) Alkaline earth metals
c) Halogens
d) Transition metals

Answer
b) Alkaline earth metals

The element with the lowest atomic number is:
a) Hydrogen
b) Helium
c) Lithium
d) Oxygen

Answer
a) Hydrogen

The first ionization energy is the energy required to remove:
a) A proton from an atom
b) An electron from a positively charged ion
c) An electron from a neutral atom
d) A neutron from an atom

Answer
c) An electron from a neutral atom

The element with atomic number 79 is:
a) Silver
b) Gold
c) Mercury
d) Lead

Answer
b) Gold

Elements in the same group have the same number of:
a) Protons
b) Electrons
c) Neutrons
d) Valence electrons

Answer
d) Valence electrons

The element in Period 2 and Group 17 of the periodic table is:
a) Oxygen
b) Chlorine
c) Fluorine
d) Nitrogen

Answer
b) Chlorine

Elements in the same period have the same number of:
a) Protons
b) Electrons
c) Valence electrons
d) Energy levels

Answer
d) Energy levels

The element with atomic number 20 is:
a) Calcium
b) Potassium
c) Sodium
d) Magnesium

Answer
a) Calcium

The electron configuration of chlorine is:
a) 1s² 2s² 2p⁶ 3s² 3p⁵
b) 1s² 2s² 2p⁶ 3s² 3p³
c) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁵
d) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹

Answer
b) 1s² 2s² 2p⁶ 3s² 3p⁵

Which element has the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p³?
a) Sulfur
b) Chlorine
c) Phosphorus
d) Silicon

Answer
c) Phosphorus

The element with atomic number 47 is:
a) Silver
b) Copper
c) Zinc
d) Nickel

Answer
b) Copper

Which group contains the most reactive nonmetals?
a) Group 1 (alkali metals)
b) Group 17 (halogens)
c) Group 18 (noble gases)
d) Group 2 (alkaline earth metals)

Answer
b) Group 17 (halogens)

The element with atomic number 3 is:
a) Helium
b) Carbon
c) Hydrogen
d) Lithium

Answer
d) Lithium

The element with the symbol “K” in the periodic table is:
a) Potassium
b) Krypton
c) Kryptonite (fictional)
d) Platinum

Answer
a) Potassium

The element with atomic number 56 is a member of which group?
a) Group 1 (alkali metals)
b) Group 2 (alkaline earth metals)
c) Group 17 (halogens)
d) Group 18 (noble gases)

Answer
b) Group 2 (alkaline earth metals)

Which of the following elements is a halogen?
a) Chlorine
b) Magnesium
c) Aluminum
d) Sodium

Answer
a) Chlorine

The element with atomic number 17 is:
a) Chlorine
b) Fluorine
c) Bromine
d) Iodine

Answer
a) Chlorine

The element with the highest first ionization energy is:
a) Potassium
b) Sodium
c) Lithium
d) Helium

Answer
d) Helium

Which of the following elements is a noble gas?
a) Oxygen
b) Argon
c) Sulfur
d) Nitrogen

Answer
b) Argon

The element with atomic number 11 is:
a) Sodium
b) Potassium
c) Calcium
d) Iron

Answer
a) Sodium

The electron configuration of aluminum is:
a) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p³
b) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹
c) 1s² 2s² 2p⁶ 3s² 3p⁵
d) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰

Answer
b) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹

The element with atomic number 16 is:
a) Sulfur
b) Phosphorus
c) Oxygen
d) Nitrogen

Answer
a) Sulfur

The element with atomic number 12 is:
a) Iron
b) Magnesium
c) Nickel
d) Calcium

Answer
d) Calcium

The element with atomic number 26 is:
a) Iron
b) Copper
c) Nickel
d) Zinc

Answer
a) Iron

The element with the lowest electronegativity value is:
a) Fluorine
b) Hydrogen
c) Francium
d) Lithium

Answer
c) Francium

Which group contains elements with the highest electron affinity?
a) Alkali metals (Group 1)
b) Alkaline earth metals (Group 2)
c) Halogens (Group 17)
d) Noble gases (Group 18)

Answer
c) Halogens (Group 17)

The element with the highest atomic number is:
a) Uranium
b) Plutonium
c) Neptunium
d) Curium

Answer
a) Uranium

Which of the following elements is a noble gas?
a) Helium
b) Bromine
c) Phosphorus
d) Potassium

Answer
a) Helium

The element with atomic number 53 is:
a) Iodine
b) Chlorine
c) Bromine
d) Fluorine

Answer
a) Iodine

Elements in the same group have the same number of:
a) Neutrons
b) Protons
c) Valence electrons
d) Energy levels

Answer
c) Valence electrons

Which element has the symbol “Na” in the periodic table?
a) Nitrogen
b) Nickel
c) Sodium
d) Neon

Answer
c) Sodium

The element with the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ is in which
period?
a) Period 3
b) Period 4
c) Period 5
d) Period 6

Answer
b) Period 4

The element with atomic number 7 is:
a) Nitrogen
b) Oxygen
c) Carbon
d) Helium

Answer
a) Nitrogen

The element with the highest metallic character is:
a) Sodium
b) Potassium
c) Rubidium
d) Cesium

Answer
d) Cesium

The element with atomic number 8 is:
a) Nitrogen
b) Oxygen
c) Hydrogen
d) Carbon

Answer
b) Oxygen

The element with the highest first electron affinity is:
a) Fluorine
b) Chlorine
c) Oxygen
d) Helium

Answer
a) Fluorine

The electron configuration of nitrogen is:
a) 1s² 2s² 2p⁶
b) 1s² 2s¹
c) 1s² 2s² 2p³
d) 1s² 2s² 2p⁴

Answer
c) 1s² 2s² 2p³

The element with atomic number 19 is:
a) Sodium
b) Potassium
c) Calcium
d) Iron

Answer
b) Potassium

The element with the lowest first ionization energy is:
a) Francium
b) Cesium
c) Rubidium
d) Lithium

Answer
a) Francium

Which group contains elements with only one valence electron?
a) Alkali metals (Group 1)
b) Alkaline earth metals (Group 2)
c) Halogens (Group 17)
d) Noble gases (Group 18)

Answer
a) Alkali metals (Group 1)

The element with atomic number 36 is:
a) Krypton
b) Xenon
c) Neon
d) Argon

Answer
a) Krypton

Which of the following elements is a metal?
a) Fluorine
b) Sulfur
c) Iron
d) Chlorine

Answer
c) Iron

The element with atomic number 15 is:
a) Nitrogen
b) Oxygen
c) Phosphorus
d) Sulfur

Answer
c) Phosphorus

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