Question : Identify whether the given statements about p-block elements are correct or incorrect.
Statement A: In p-block elements, the last electron enters the outermost p orbital.
Statement B: The non-metals and metalloids exist only in the p-block of the periodic table.
Option 1: Both Statements A and B are correct.
Option 2: Only Statement A is correct.
Option 3: Both Statements A and B are incorrect.
Option 4: Only Statement B is correct.
Correct Answer: Both Statements A and B are correct.
Solution : The correct option is Both Statements A and B are correct.
In p-block elements, the last electron is added to the outermost p orbital. The p-block includes elements whose outermost electrons are in the p subshell.
Non-metals and metalloids are found in the p-block of the periodic table. Metalloids, which have properties intermediate between metals and non-metals, are found in the p-block but can also be located in other blocks of the periodic table.
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Question : Identify whether the given statements about ionisation energy are correct or incorrect.
Statement A: The ionisation energy of an atom is the amount of energy that is required to remove an electron from a mole of atoms in the gas phase.
Statement B: The ionisation energy increases from top to bottom in groups and decreases from left to right across a period.
Question : Which of the following statements is correct regarding the climate of the Indian subcontinent? A. The climate of North India remains similar throughout the year B. The Himalayas protect the subcontinent from extremely cold winds from central Asia.
Option 1: Only statement B is correct.
Option 2: Both statements A and B are incorrect.
Option 3: Only statement A is correct.
Option 4: Both statements A and B are correct.
Question : Which of the following statements is correct?
Option 1: Atomic radius increases across a period and decreases down a group in the periodic table.
Option 2: Atomic radius decreases across a period and increases down a group in the periodic table.
Option 3: Atomic radius decreases across a period and down a group in the periodic table.
Option 4: Atomic radius increases across a period and increases down a group in the periodic table.
Question : Which of the following statements is not correct regarding the alkali metals?
Option 1: All the alkali metals are silvery white, soft and light metals.
Option 2: The ionisation enthalpies of the alkali metals are considerably low and decrease down the group.
Option 3: Group 1 metals are known as alkali metals.
Option 4: All the alkali metals have two valence electrons.
Question : Among the given elements, which comes first in the periodic table of elements?
Option 1: Neon
Option 2: Sodium
Option 3: Silicon
Option 4: Potassium
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