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Test: Chemistry - 2 - UPSC MCQ


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10 Questions MCQ Test - Test: Chemistry - 2

Test: Chemistry - 2 for UPSC 2024 is part of UPSC preparation. The Test: Chemistry - 2 questions and answers have been prepared according to the UPSC exam syllabus.The Test: Chemistry - 2 MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Chemistry - 2 below.
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Test: Chemistry - 2 - Question 1
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Which law states that the physical and chemical properties of elements are a periodic function of their atomic number?

Detailed Solution for Test: Chemistry - 2 - Question 1
The correct answer is Option B: Modern Periodic Law. This law states that the physical and chemical properties of elements are a periodic function of their atomic number, not atomic weight.
Test: Chemistry - 2 - Question 2
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Which group of elements is known for having low melting and boiling points, low ionization energies, and high electropositivity?

Detailed Solution for Test: Chemistry - 2 - Question 2
The correct answer is Option A: S-block elements. S-block elements are known for their low melting and boiling points, low ionization energies, high electropositivity, and strong reducing properties.
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Test: Chemistry - 2 - Question 3
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Which phenomenon describes the existence of an element in different forms with different physical properties but similar chemical properties?

Detailed Solution for Test: Chemistry - 2 - Question 3
The correct answer is Option A: Allotropy. Allotropy is the phenomenon in which an element exists in different forms with varying physical properties but similar chemical properties.
Test: Chemistry - 2 - Question 4
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Which group of elements is also referred to as inert gases or noble gases?
Detailed Solution for Test: Chemistry - 2 - Question 4
The correct answer is Option D: Group 18 elements. These elements are commonly known as inert gases or noble gases due to their low reactivity.
Test: Chemistry - 2 - Question 5
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Which series of elements occurs in the periodic table after actinium and is called actinides?
Detailed Solution for Test: Chemistry - 2 - Question 5
The correct answer is Option D: Actinides. The series of elements with atomic numbers from 90 to 103, which occur after actinium, are known as actinides.
Test: Chemistry - 2 - Question 6
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Which allotropic form of carbon is transparent, has a refractive index of 2.45, and is used in making jewelry and cutting tools?
Detailed Solution for Test: Chemistry - 2 - Question 6
The correct answer is Option C: Diamond. Diamond is transparent, has a refractive index of 2.45, and is commonly used in making jewelry and cutting tools due to its extreme hardness.
Test: Chemistry - 2 - Question 7
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What is the atomic number of an element that has 19 protons and 20 neutrons in its nucleus?
Detailed Solution for Test: Chemistry - 2 - Question 7
The atomic number is equal to the number of protons in the nucleus. In this case, the element has 19 protons, so its atomic number is 19.
Test: Chemistry - 2 - Question 8
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How many valence electrons do elements in Group 1 of the periodic table (alkali metals) typically have?
Detailed Solution for Test: Chemistry - 2 - Question 8
Elements in Group 1 (alkali metals) typically have 1 valence electron in their outermost shell.
Test: Chemistry - 2 - Question 9
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Which subatomic particle is responsible for the chemical properties of an element?
Detailed Solution for Test: Chemistry - 2 - Question 9
The chemical properties of an element are primarily determined by the arrangement and behavior of electrons.
Test: Chemistry - 2 - Question 10
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Which term describes atoms of different elements with the same mass number but different atomic numbers?
Detailed Solution for Test: Chemistry - 2 - Question 10
The correct term for atoms of different elements with the same mass number but different atomic numbers is "isobars."
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