CHM192

A. Calcium chloride is mostly used as _____.

B. Filtration involves the separation of __________ solid materials from a liquid.

C. _________ is the container used to keep sample dry.

D. A stirrer hot plate keeps the _________ at a constant temperature while stirring.

E. Isomers have different physical properties and _________ chemical properties.

F. For temperature above 100oC, __________ baths are generally used

G. When alcohol is dehydrated, product x is formed. To prevent x from reforming back to alcohol, x is preferably removed by _________

H. The simplest formular for representing hydrocarbon is called __________ formular.

I. The viscosity of most liquids varies _________ with temperature.

J. Below the _________ point, solvent will be seen running back into the flask.

K. Elimination reaction of an alcohol is called _________

L. The heating mantle is safe because it does not produce _________

M. All edges of glass tubing must be fine-polished to round off the ________ edges.

N. When heating beakers with a burner, _________ should be placed between the vessel and the flame.

O. __________ is the process of boiling reactants while cooling the vapour and returning it to the flask as liquid.

P. The _________ of a solid is the temperature at which the liquid and solid phases are in equilibrium.

Q. Hydrocarbons consisting of carbon linked in a single chain are chain aliphatic, those linked by branched chain are called ________

R. Aqueous ammonia should be used only in the ________ hood.

S. Modern digital weighing scales have many types, styles and _________ ranges.

T. Some solids begin to ___________ a few degrees below their melting point.

U. Which of these; ethanol and methanol, has higher boiling point and why?

V. __________ flasks are used to prepare solution of a specific concentration.

W. Most laboratory __________ are equipped with multiple gas nozzles connected to a central gas source.

X. When liquid is cooled less than its freezing point, it _________ .

Y. BrCH2CH2Br represent _________.

Z. A Bunsen burner was named after _________ Bunsen.

AA. Supercooling occurs when a liquid is cooled __________ its freezing point.

AB. Which of the following reactions (1) substitution (2) addition (3) reaction with sulphuric acid, is/are not common to alkanes?

AC. Heating mantles must be used with variable _______

AD. The shrinkage of a solid being heated is called _____.

AE. ________ are used to heat small quantities of substances to very high temperatures.

AF. Powerful pumps provide good heat __________ and optimum temperature accuracy.

AG. Proper selection of a suitable type of stirrer requires that you certain ________ variables.

AH. The two types of magnetic stirrers are mechanical and _________

AI. The most common methods of lighting the burner are using a match on a ___________ lighter.

AJ. For micro-scale work, a Pasteur dropping ___________ can be used instead of glass funnel.

AK. NaOH is ________ and can eat away living tissues.

AL. Bromine water is reacted with I. Butane II. Butene III. Butyne. In which of the/these reactions will bromine water be decolourised?

AM. In the laboratory, the most common measuring instrument is _________

AN. Bunsen burner is used for heating, sterilization and ________

AO. In the reaction of KMnO4 and ethene, the KMnO4 is ________

AP. The most important applications of magnetic  stirring is stirring in a ________ system.

AQ. Precision and _________ were still missing with the use of spring balance.

AR. A simple oil bath can be made by heating a _________ of oil on a hot plate.

AS. Alkanes are saturated hydrocarbons, cycloalkanes are ____________ hydrocarbons.

AT. Never place the litmus paper _________ into the solution.

AU. Modern digital weighing scales __________ results very precisely.

AV. Cyclic hydrocarbons are aliphatic compound that have carbon atoms linked _________

AW. Sodium metal _________ on contact with water.

AX. Elimination of a molecule of water in alcohol results in Pi-bond formation of _________

AY. One of the reasons for the vast array of organic compounds is the phenomenon of ____________.

AZ. A medicine dropper is calibrated by counting the number of drops it produces to make up a ________

BA. The size of steam bath can be controlled by adding or removing ___________

BB. To write the ______________ formula of hydrocarbon, the hydrogen atoms are grouped with their carbon atom.