Chemistry 10

Which of the following procedures would you use to measure accurately 25.6 cm3 of 1.0 mol per dm3 hydrochloric acid?

• A. Weigh 25.6 g of the acid in an empty beaker.

• B. Measure the volume of acid solution using a pipette.

• C. Measure the volume of acid solution with a measuring cylinder

• D. Collect the acid solution from a burrete

The melting points of water and sodium nitrate are  $0\degree C$ and  $308\degree C$ respectively. Which of the following shows the likely freezing point of 100 cm3 of 0.01 mol per dm3 aqueous sodium nitrate solution?

• A.  $-5\degree C$  

• B.  $0\degree C$  

• C.  $5\degree C$  

• D.  $300\degree C$  

A series of experiments is conducted on an newly discovered substance. Which of the following observations suggests that substance is not pure?

• A. It dissolves in organic liquid but not water.

• B. It burns in the presence of oxygen to produce two oxides.

• C. Thermal decomposition of the substances does not yield any product.

• D. It boils over a wide range of temperatures.

Noble gases are inert because they have completed outer electron shells. Which of these elements isn't a noble gas?

• A. Helium

• B. Chlorine

• C. Argon

• D. Krypton

What is the most common isotope of hydrogen?

• A. Deuterium

• B. Tritum

• C. Protium

• D. Hydrogen only has one isotope!

Which of the following statements is true in terms of the kinetic particle theory?

• A. Liquids and gases take the shape and volume of the containers as the particles are arranged according to the size of the container.

• B. Solids and liquids are not compressible as the particles are vibrating forcefully in fixed positions.

• C. Since the particles of a gas move randomly and collide with each other, they have the strongest attractive forces.

• D. Particles of a solid have the least kinetic energy as they can only vibrate fixed positions.

The symbol Sb stands for stibnum or stibnite. What is the modern name of this element?

• A. Seaborgium

• B. Arsenic

• C. Antimony

• D. Tin

The acid generally stored in batteries is

• A. Nitric acid

• B. Sulphuric acid

• C. Hydrochloric acid

• D. Acetic acid

Mordants are substances that...

• A. Fix colors in fabrics

• B. Are very hard solids.

• C. Have a bleaching action

• D. Have a capacity of increasing the intensity of colors

Which of the following has the same of molecules as 60 cm3 of carbon dioxide at room temperature and pressure?

• A. 0.0850 g of ammonia

• $B.\ 3.0\ x\ 10^{21}\ atoms\ of\ oxygen$

• C. 25 cm3 of 0.10 mol per dm3 aqueous hydrochloric acid solution

• D. 60 cm3 of ethanol liquid