Revision Term 1 Exam 1

Which of the following is one of the uses of bromine compounds?

• Disinfect water in swimming pools

• Used to study genetic material, such as DNA

• Necessary to produce thyroxin hormone

• Medical research due to their radioactive properties

Silver and gold are used in jewelry. Which of the following is not a reason why silver and gold or used in jewelry?

• High abundance on earth crust

• Relative softness

• Attractive colors

• Resistance to corrosion

In the figure below, what is a crystal of table salt made up from?

• Bonding between metal and nonmetal

• Bonding between metal and metal

• Bonding between nonmetal and nonmetal

• Bonding between nonmetal and metalloid

What property is described by the measurement 298 K?

• Mass

• Temperature

• Time

• Length

What is the name of the elements shaded in green stair step line in the following periodic table of elements?

• Metalloids

• Metals

• Nonmetals

• Undiscovered elements

Bromine has two isotopes:one isotope has an atomic mass of 78.92 amu and a relative abundance of 50.69%.The other major isotope of bromine has an atomic mass of 80.92 amu and a relative abundance of 49.31%.What is the average atomic mass of bromine?

• 79.91 amu

• 80.23 amu

• 79.52 amu

• 79.77 amu

To determine the boiling point of unknown liquid, a student heats 10 ml of liquid in a test tube and records the temperature for every minute for 25 minutes. He plots the relation in the following graph.What does the time on the x-axis represents ?

• The dependent variable

• The independent variable

• The control

• The constant

What is the assigned part on the atom shown below?

• Nucleus

• Proton

• Electron

• Neutron

Water is flowing through a horizontal pipe on a non uniform cross section (wide at the beginning and narrow at the end). What will the pressure and velocity for the water be at the extreme narrow portion of the pipe?

• Maximum pressure and least velocity

• Least pressure and maximum velocity

• Both pressure and velocity maximum

• Both pressure and velocity least

According to the pascal’s principle, what happens to the pressure applied to a fluid?

• Decrease as it moves

• Transmitted unchanged throughout the fluid

• Increases by factor of 5 as it moves through the fluid

• Doubles as it is transmitted throughout the fluid