A list of gases is shown. Answer the following questions about these gases. Each gas may be used once, more than once or not at all. Nitrogen dioxide, $$$\mathrm{NO}_{2}$$$, and carbon monoxide are removed from a car exhaust by a catalytic converter. Write the symbol equation for this reaction. ..........................................................................................................................................

Chemistry

IGCSE&ALevel

CAIE

Exam No：0620_s24_qp_42 Year：2024 Question No：1(b)

Answer:

8.3.1.1. increasing density

8.3.1.2. decreasing reactivity

8.3.2.1. chlorine, a pale yellow-green gas

8.3.2.2. bromine, a red-brown liquid

8.3.2.3. iodine, a grey-black solid

8.3.3. Describe and explain the displacement reactions of halogens with other halide ions

8.3.4. Predict the properties of other elements in Group VII, given information about the elements