Explanation

Citric acid is commonly found in citrus fruits like oranges and lemons.

Grapes contain small amounts, but mango is not a significant source of citric acid;

It contains more malic and tartaric acids instead.

Explanation

Harvesting is the most important step in the preparation of sugar from sugarcane or sugar beets.

Sugarcane is typically harvested by hand or by machine, and sugar beets are harvested by machine.

The quality of the harvest affects the quality of the sugar produced.

Explanation

Accuracy refers to how close a measured value is to the true or accepted value.

It indicates the degree of agreement between the measured value and the true value.

Explanation

A reversible reaction is a reaction that can proceed in both the forward and reverse directions, and never goes to completion.

It is represented by a double arrow (⇌) between the reactants and products.

For example: A + B ⇌ C + D

Key Point:

• Single arrow (→): Represents an irreversible reaction, where the reaction only proceeds in one direction.

Explanation

Thermochemistry is the study of chemical reactions and the energy changes that involve heat.

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Explanation

A molecule is formed when two or more atoms chemically bond together.

While "H" represents the element hydrogen, it is a single atom and not a molecule.

A molecule of hydrogen is represented as H2, where two hydrogen atoms are bonded together. 

Explanation

In gas chromatography (GC), the mobile phase is a gas, such as helium, nitrogen, or argon, that carries the sample through the column.

The sample is vaporized and separated based on its affinity for the stationary phase, which is typically a solid or liquid coating on the column.

Explanation

The physical methods used to measure physical properties are called Gravimetric analysis methods.

This technique involves measuring the mass of a substance to determine its concentration or quantity.

Explanation

Lactose, also known as milk sugar.

It is a disaccharide composed of galactose and glucose molecules.

It is found in milk and other dairy products.

Explanation

The prefix "hept" stands for 7 carbon atoms.

This is a Greek prefix used in chemistry to denote the number of carbon atoms in a molecule.

Here are some examples:

• Hex- means 6
• Hept- means 7
• Oct- means 8
• Non- means 9
• Dec- means 10