Fill in the blanks:
1) As we descend the electrochemical series containing cation, the tendency of the cation to get ............(oxidized/reduced) at the cathode increases.

2) The (highest/lower) ........... the concentration of an ion in a solution, the greater is the probability of its being discharged at its appropriate electrode. 

A to F below relate to the source and extraction of either Zinc or Aluminium.
A. Bauxite
B. Coke
C. Cryolite
D. Froth floatation
E. Sodium hydroxide solution
F. Zinc blende.

Fill In the blanks using the most appropriate words from A to F:-
1) The ore from which Aluminium is extracted must first be treated with ............... so that pure Aluminium oxide can be obtained.

2) Pure Aluminium oxide is dissolved in ................... to make a conducting solution.

Fill in the blanks with suitable words:-

An acid is a compound which when dissolved in water forms Hydronium ions as the only (1)...................... ions. A base is a compound which if soluble in water contains (2) ......................... ions. A base reacts with an acid to form a (3) ..............asnd water only. This type of reaction is known as (4) ........................

Write the formula of Cryolite.

{Ethane, Ethene, Ethanoic acid, Ethyne, Ethanol }

From the box given above, name:-

The compound with -OH as the part of its structure.

{Ethane, Ethene, Ethanoic acid, Ethyne, Ethanol }

From the box given above, name:-

The compound with -COOH as the part of its structure.

{Ethane, Ethene, Ethanoic acid, Ethyne, Ethanol }

From the box given above, name:-

Homologue of Homologues series with general formula C_nH_2n.

Element Q and S React together to form an ionic compound. Under normal conditions, which physical state will the compound QS exist in? 

Part (i) to (v) refer to changes in the properties of elements on moving left to right across a period of the periodic Table. For each property choose the letter corresponding to the correct answer from the choice A, B,C and D.

The non-metallic Character of the elements:

• Decreases

• Increase

• Remains the same

• Remains the same

Part (i) to (v) refer to changes in the properties of elements on moving left to right across a period of the periodic Table. For each property choose the letter corresponding to the correct answer from the choice A, B,C and D.

The electronegativity:

• Depends on the number of valence electrons

• remains the same

• decreases

• decreases