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A. Cyclic hydrocarbons are aliphatic compound that have carbon atoms linked _________
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B. __________ is the process of boiling reactants while cooling the vapour and returning it to the flask as liquid.
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C. Which of these; ethanol and methanol, has higher boiling point and why?
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D. A simple oil bath can be made by heating a _________ of oil on a hot plate.
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E. Heating mantles must be used with variable _______
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F. _________ is the container used to keep sample dry.
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G. Elimination reaction of an alcohol is called _________
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H. A Bunsen burner was named after _________ Bunsen.
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I. For micro-scale work, a Pasteur dropping ___________ can be used instead of glass funnel.
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J. __________ flasks are used to prepare solution of a specific concentration.
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K. Calcium chloride is mostly used as _____.
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L. The two types of magnetic stirrers are mechanical and _________
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M. When heating beakers with a burner, _________ should be placed between the vessel and the flame.
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N. The shrinkage of a solid being heated is called _____.
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O. The _________ of a solid is the temperature at which the liquid and solid phases are in equilibrium.
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P. 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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Q. Modern digital weighing scales __________ results very precisely.
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R. One of the reasons for the vast array of organic compounds is the phenomenon of ____________.
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S. Filtration involves the separation of __________ solid materials from a liquid.
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T. Sodium metal _________ on contact with water.
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U. Bunsen burner is used for heating, sterilization and ________
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V. ________ are used to heat small quantities of substances to very high temperatures.
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W. Modern digital weighing scales have many types, styles and _________ ranges.
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X. To write the ______________ formula of hydrocarbon, the hydrogen atoms are grouped with their carbon atom.
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Y. 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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Z. When liquid is cooled less than its freezing point, it _________ .
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AA. The most common methods of lighting the burner are using a match on a ___________ lighter.
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AB. Precision and _________ were still missing with the use of spring balance.
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AC. Isomers have different physical properties and _________ chemical properties.
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AD. Hydrocarbons consisting of carbon linked in a single chain are chain aliphatic, those linked by branched chain are called ________
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AE. Elimination of a molecule of water in alcohol results in Pi-bond formation of _________
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AF. Proper selection of a suitable type of stirrer requires that you certain ________ variables.
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AG. The simplest formular for representing hydrocarbon is called __________ formular.
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AH. The size of steam bath can be controlled by adding or removing ___________
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AI. NaOH is ________ and can eat away living tissues.
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AJ. Alkanes are saturated hydrocarbons, cycloalkanes are ____________ hydrocarbons.
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AK. The viscosity of most liquids varies _________ with temperature.
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AL. All edges of glass tubing must be fine-polished to round off the ________ edges.
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AM. Never place the litmus paper _________ into the solution.
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AN. The most important applications of magnetic stirring is stirring in a ________ system.
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AO. For temperature above 100oC, __________ baths are generally used
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AP. Most laboratory __________ are equipped with multiple gas nozzles connected to a central gas source.
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AQ. A medicine dropper is calibrated by counting the number of drops it produces to make up a ________
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AR. In the reaction of KMnO4 and ethene, the KMnO4 is ________
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AS. Below the _________ point, solvent will be seen running back into the flask.
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AT. Aqueous ammonia should be used only in the ________ hood.
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AU. Some solids begin to ___________ a few degrees below their melting point.
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AV. Powerful pumps provide good heat __________ and optimum temperature accuracy.
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AW. A stirrer hot plate keeps the _________ at a constant temperature while stirring.
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AX. Which of the following reactions (1) substitution (2) addition (3) reaction with sulphuric acid, is/are not common to alkanes?
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AY. In the laboratory, the most common measuring instrument is _________
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AZ. The heating mantle is safe because it does not produce _________
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BA. BrCH2CH2Br represent _________.
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BB. Supercooling occurs when a liquid is cooled __________ its freezing point.
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