Explanation

A catalyst speeds up the rate of reaction but does not affect the position of equilibrium.

Temperature, pressure, and concentration can shift the equilibrium position of a reversible reaction.

Explanation

The union of two sets A and B (denoted as A ∪ B) includes all elements that are in A, in B, or in both.

It represents the total collection of elements from both sets without repetition.

Explanation

The elbow is a joint, while thumb, finger, and toe are all specific digits on the body.

Elbow refers to a part of the limb, not a digit like the others.

Explanation

Rice and curry are our staple food.

"Rice and curry" is a compound subject, so the plural verb "are" is used.

This ensures subject-verb agreement in the sentence.

Explanation

A saturated solution contains the maximum amount of solute that can dissolve at a given temperature.

Any additional solute will remain undissolved, as the solution has reached its limit.

Explanation

Aerobic exercise requires oxygen to generate energy, improving cardiovascular endurance.

Examples include running, swimming, and cycling, which help strengthen the heart and lungs.

Explanation

Vitamin K is essential for blood clotting.

Its deficiency can lead to excessive bleeding (haemorrhage).

It helps produce clotting factors in the liver, preventing uncontrolled bleeding.

Explanation

Jogging in place helps strengthen certain muscles, especially the legs and core, by engaging them through repeated movement.

It may not target as many muscles as running, but it still provides a moderate workout.

Explanation

Explanation

The additive inverse of a number is the value that, when added to the original number, results in zero.

For 1/7, the additive inverse is:

-1/7

Since:

1/7 + (-1/7) = 0