CHM192

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

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

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

D. Modern digital weighing scales __________ results very precisely.

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

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

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

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

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

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

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

L. Calcium chloride is mostly used as _____.

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

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

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

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

Q. BrCH2CH2Br represent _________.

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

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

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

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

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

W. A Bunsen burner was named after _________ Bunsen.

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

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

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

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

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

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

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

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

AF. Sodium metal _________ on contact with water.

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

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

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

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

AK. Elimination reaction of an alcohol is called _________

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

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

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

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

AP. Heating mantles must be used with variable _______

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

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

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

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

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

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

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

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

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

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

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

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