The simplest ratio of atoms in a compound is given by the:

John Smith is employed at $8 per hour, he is paid time and a half for hours of work excess Of 44 hours per week. Last week worked for 50 hours. His gross earnings were

The Earth′s first atmosphere contained all of these gases EXCEPT for:

The number of atoms in this formula, H₂SO₄, is:

Biological catalysts in yeast are called:

Which of the following sets has an infinite number of members?

Acid soils can be neutralised by adding:

When limestone is heated strongly it changes into:

Instruction: Choose from the four options the word or pair of words which BEST completes the meaning of the sentence.

An attack on someone when that person is most vulnerable may be ............ but is always ............

Hydrocarbons contain carbon and:

The catalyst in the Haber Process is:

A reaction that gives out heat is said to be:

In an ecosystem a population is:

Instructions: Choose from the four suggested answers the word which is closest to OPPOSITE in meaning to the underlined word.

She paid meticulous attention to her work as she attached the beads to the costume.

During adolescence, boys:

Instructions: Choose from the four suggested answers the word which is closest to OPPOSITE in meaning to the underlined word.

The headgear worn by the factory worker is made from artificial material.

Which of the following statements about aerobic respiration is correct?

With iodine, starch changes colour to:

The area of the trapezium ABCD above is

This question refers to the triangle PQR in which angle QPR = 90°, PR = 12 cm and PQ = 5 cm.

The length of QR, in cm, is