A metal 'X' is placed in an aqueous solution of metal 'Y' salt. If metal 'X' displaces metal 'Y' from its solution, what can be inferred about their relative reactivities?

Match the following indicators with their characteristic color change in an acidic medium and a basic medium:

Indicator	Color in Acidic Medium	Color in Basic Medium
P. Litmus	1. Red	i. Blue
Q. Phenolphthalein	2. Colorless	ii. Pink
R. Methyl Orange	3. Red	iii. Yellow

Which of the following options correctly matches the indicator with its color changes?

Which of the following compounds is an example of a strong base?

Consider the following pairs of oxides and their nature:
1. CO2 : Acidic oxide
2. Na2O : Basic oxide
3. Al2O3 : Amphoteric oxide
4. H2O : Neutral oxide

How many of the above pairs are correctly matched?

Arrange the following steps involved in the extraction of metals from their ores in the correct chronological order:
I. Refining of the metal
II. Concentration of the ore
III. Conversion of concentrated ore to crude metal
IV. Reduction of metal oxide to metal

Which of the following properties is generally NOT exhibited by non-metals?

A solution has a pH value of 2. This solution is considered to be:

Which of the following metals forms an amphoteric oxide?

Graphite and diamond are allotropes of which non-metal?

Match the following substances with their common uses:

Substance	Use
P. Sodium Hydroxide	1. Antacid
Q. Acetic Acid	2. Soap and Detergent manufacturing
R. Magnesium Hydroxide	3. Food preservative/Vinegar
S. Sulphuric Acid	4. Car batteries/Fertilizers

Which of the following options correctly matches the substance with its use?

When an acid reacts with a metal carbonate, which gas is typically produced?

Which of the following metals is the most ductile, meaning it can be drawn into very fine wires?

According to the Brønsted-Lowry theory, an acid is a substance that:

Which of the following non-metals is a greenish-yellow gas that is highly reactive and used as a disinfectant?

Which of the following is considered the strongest naturally occurring acid?

Galvanization is a method of protecting iron from rusting by coating it with a thin layer of which metal?

Match the following metals with their primary ores:

Metal	Primary Ore
P. Aluminium	1. Bauxite
Q. Iron	2. Haematite
R. Copper	3. Malachite
S. Zinc	4. Calamine

Which of the following options correctly matches the metal with its ore?

Aqua Regia, a highly corrosive mixture, is prepared by mixing concentrated hydrochloric acid and concentrated nitric acid in a specific ratio. What is this ratio (HCl : HNO3)?

Which of the following statements about carbon is TRUE?

Consider the following chemical reactions:
1. Acid + Metal → Salt + Hydrogen gas
2. Base + Non-metal oxide → Salt + Water
3. Metal + Water → Metal oxide/hydroxide + Hydrogen gas
4. Acid + Base → Salt + Water

How many of the above general reaction types are correctly represented?

Which of the following metals is an exception to the general property that metals are solids at room temperature?

What is the primary product (besides water) formed when a strong acid reacts with a strong base in a neutralization reaction?

Arrange the following metals in increasing order of their reactivity:
I. Copper (Cu)
II. Sodium (Na)
III. Iron (Fe)
IV. Gold (Au)

Which of the following is an example of an olfactory indicator?