The diagram shows part of the nitrogen cycle. Which of the numbered arrows represent(s) denitrification? Answer: 5) A In Denitrification, nitrate ions are reduced to produce nitrogen gas (N2). This…

Which one of the following is a simplification of 48 m5 p / 40m2 p3 ? Answer: 4) B 48/40 = 6/5 m5 ÷ m2 = m3p ÷ p3 = p-2 The simplification…

Here are four statements about light:1 In a vacuum, green light travels faster than blue light.2 In a vacuum, the wavelength of red light is greater than the wavelength of…

Elements Q and Z are shown in the Periodic Table as: What is the empirical formula and bonding type of the compound formed between these elements? Answer: 2) C Q…

People with cystic fibrosis may be unable to digest their food fully because of thick sticky mucus. This prevents the secretion of pancreatic juices. Doctors sometimes prescribe enzyme supplement medication…

A graph of kinetic energy, in joules ( y - axis) against the square of the speed in (m / s) 2 (x - axis) is plotted for an object…

What is the volume of hydrogen gas formed (measured at room temperature and pressure)when 0.23 g of pure sodium reacts completely with an excess of water?(Ar values: H = 1.0;…

The picture shows a Siamese cat. This type of cat has a gene which is sensitive to temperature. When this gene is inactive in the cells, the coat colour is…

The diagram shows a shape made from a quarter circle of radius 6 cm and a right-angled triangle with a hypotenuse of length 9 cm. Which of the following expressions…

A book rests on a table, which in turn rests on the floor. The floor exerts a force P on the table. Force P and one other force constitute a…