Electron affinity is maximum in: (a) Magnesium (b) Argon (c) Lithium (d) Bromine

An element with the largest atomic radius among the following is: (a) Carbon (b) Nitrogen (c) Lithium (d) Beryllium

An element in period 3, whose electron affinity is zero: (a) Neon (b) Sulphur (c) Sodium (d) Argon

An atom of X forms an ion according to the equation X ⟶ X+2. The atomic number of the atom X is: (a) 16 (b) 10 (c) 12 (d) 14

The electronic configuration of an element is 2,8,2. The hydroxide of this element can produce ............... hydroxyl ions per molecule. (a) 3 (b) 2 (c) 1 (d) 0

Match the Column A with Column B: Column A Column B (a) Water 1. Lithium (b) Alkali metal 2. Iodine (c) Halogen 3. Covalent compound (d) Calcium oxide 4. Acetic acid (e) Weak acid 5. Ionic compound 6. Sulphuric acid

Arrange the following as per the instructions given in the brackets: (a) Carbon, Fluorine, Beryllium (decreasing order of atomic size) (b) Sulphuric acid, Phosphoric acid, Acetic acid (increasing order of number of replaceable H atoms per molecule) (c) Potassium, Lithium, Sodium (increasing order of ionization potential)

Identify the following: (a) An element in period 1 which can be placed in both group 1 and group 17 of the Periodic Table. (b) The element having electronic configuration 2, 8, 6. (c) The most electronegative element of period 3.

Give reasons for the following: (a) Inert gases do not form ions. (b) Covalent compounds have a low melting and boiling point.

Fill in the blanks with the choices given in the brackets: (a) Metals are good ............... [oxidizing agents /reducing agents] (b) Non-polar covalent compounds are ............... [good / bad] conductors of heat and electricity. (c) Higher the pH value of a solution, the more is ............... [acidic / alkaline] it is. (d) ............... [Silver chloride / Lead chloride] is a white precipitate that is soluble in excess of Ammonium hydroxide solution. (e) Conversion of ethene to ethane is an example of ............... . [hydration / hydrogenation]

X, Y & Z are three metallic atoms in successive order belonging to the same group such that atomic radii of ‘X’ is the smallest. Which of the three atoms is the best reducing agent? (a) X (b) Y (c) Z (d) All three have the same reducing power

Assertion (A): The tendency of losing electrons increases down the Group. Reason (R): The most reactive metal is placed at the top of Group 1. (a) Both (A) and (R) are true, and (R) is the correct explanation of (A). (b) Both (A) and (R) are true, and (R) is not the correct explanation of (A). (c) (A) is true but (R) is false. (d) (A) is false but (R) is true.