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53 questions
1
Inorganic Chemistry
Easy
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-0.33
UNESCO inaugurated the celebration of 2019 as the International Year of the Periodic Table of Chemical Elements to celebrate its completion of how many years?
2
Inorganic Chemistry
Easy
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Assertion (A): In the periodic table of chemical elements, electron affinity is always found to increase from top to bottom in a group. Reason (R): In a group, the atomic radii generally increase from top to bottom.
3
Inorganic Chemistry
Easy
+1.0
-0.33
In a given period, electronegativity decreases as the atomic number increases. Which of these statements is/are correct? 1. 1 only 2. 2 only 3. 1 and 3
4
Inorganic Chemistry
Easy
+1.0
-0.33
What is the usual property of oxides of Group 3 and 4?
5
Inorganic Chemistry
Easy
+1.0
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The element found maximum in the soil layer is –
6
Inorganic Chemistry
Easy
+1.0
-0.33
Which one of the following is present in the largest amount in terms of percent by mass in the earth's crust?
7
Inorganic Chemistry
Easy
+1.0
-0.33
Which is the most abundant element after Oxygen?
8
Inorganic Chemistry
Easy
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Which of the following is the most common element in the Universe?
9
Inorganic Chemistry
Easy
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Approximately how many different chemical elements exist on the earth?
10
Inorganic Chemistry
Easy
+1.0
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Which of the following is a fundamental element?