Part of a radioactivity decay series is represented below. It involves the change of a nucleus M into a nucleus N by the emission of a beta-particle, followed by a…

The reaction between the gases S and T occurs according to the following equation. Which statement about this reaction is correct? Answer: 18) C A – a catalyst would increase…

The diagram shows part of the carbon cycle. Which row shows the numbered processes that use digestive or respiratory enzymes? Answer: 17) H In order to convert carbon in plants…

Cycloalkanes are alkane compounds that are in a ring shape. Some examples of cycloalkanes are given below. Which statement about these compounds is correct? Answer: 14) C A – They…

A human consumes the same amount and type of food and drink on two consecutive days. He also does the same activities on both days. However, one of the days…

Given thatܽ a=3/5+X, b= 3+X/5 and c=3+X/5+Xwhereܺ is a whole number greater than zero, whichone of the following is true? Answer: 12) B Since 6 out of the 7 options…

Below are three statements about radioactivity or nuclear energy.1 Neutrons emitted in nuclear fission can cause further fission.2 The half-life of a radioactive substance is half the time taken for…

Which of the following statements about the alkali metal rubidium is correct? Answer: 10) D Firstly, alkali metals are the elements in group 1 of the periodic table. A –…