The decomposition of hydrogen peroxide in the presence of a manganese(IV) oxide catalyst produces water and oxygen gas.2H2O2(aq) → 2H2O(l) + O2(g)0.2 g of manganese(IV) oxide granules are added to…

Which of the following is/are included in the carbon cycle?1 amino acids in an animal2 cellulose in a plant cell wall3 lipids in a bacterial cell membrane Answer: 13) H…

Point M has coordinates (6, 3p −1) and point N has coordinates (1− p, 2). The gradient of the straight line joining M and N is − 3 and it…

A large metal sphere mounted on an insulating stand is negatively charged. A smaller, uncharged metal sphere mounted on an insulating stand is placed near to the negatively charged sphere.…

Consider the non-radioactive elements in Group 1.Which of the following statements is/are correct about the element with the largest atomic number?1 It has the most vigorous reaction with cold water.2…

A lizard was placed in a chamber with a constant flow of air. The temperature of the chamberwas varied between 25 °C and 10 °C. Apart from temperature and time,…

Find the value of √6x102 +4x101 / 1.2x10-2 +4x10-3 ? Answer: 8) E To solve this simply, we just need to not use the figures given as standard form. Using…

A measuring cylinder resting on an electronic balance contains a liquid as shown in diagram 1. A small solid object X is gently lowered into the liquid and no liquid…

A chemist used electrolysis to electroplate a pure copper rod with a layer of silver. The concentration of metal ions in the electrolyte was kept constant. Which row in the…

The labels 1, 2 and 3 in the following diagram represent cellular processes. The shaded areas represent processes that can happen without the use of energy provided by cellular respiration.…