CHM192




Category: CHM192

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CHM192

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

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

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

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D. Heating mantles must be used with variable _______

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

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

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

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

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

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

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

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L. Sodium metal _________ on contact with water.

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M. Calcium chloride is mostly used as _____.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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AD. BrCH2CH2Br represent _________.

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

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

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

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AH. Elimination reaction of an alcohol is called _________

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

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

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

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

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AM. Modern digital weighing scales __________ results very precisely.

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

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

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

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

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

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AS. A Bunsen burner was named after _________ Bunsen.

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

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

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

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

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

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

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

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

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

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