(1) Saliva produced in the mouth by salivary
glands is of alkaline nature.
(2) Wrought iron is the purest form of iron.
(4) Neutralisation reactions are always exothermic.
(5) The isotope used for the production of atomic energy is U-235.
(6) Gypsum, upon strong heating, changes to plaster of paris, which gives back gypsum upon hydration.
(7) A strong solution of sodium chloride in water (about 30%) is calledbrine.
(8) Baking powder is a mixture of baking soda and tartaric acid.
(9) Antacid is a substance which can neutralise acidity in the stomach.
(10) Bleaching powder (CaOCl2) is prepared commercially by reacting chlorine with slacked lime.
(11) Curie point is the temperature at which a metal loses its magnetic properties
(12) Graphite is a very good conductor of electricity.
(13) Metals like Gold and Platinum placed at the bottom of the activity series are known as noble metals, which means that they are very little reactive chemically.
(14) Although hydrogen is a non-metal, it has been included in the reactivity series. Actually it behaves like metals and forms positive ion (H+) by losing its only electron present.
(15) Lignite contains recognisable traces of the original plant material.
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