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Describe a method that could be used to separate the components of the following a) Sand and iron filings b) Sawdust and lead pellets c) Salt and glass particles d) Silt (water and fine soil particles) e) Alcohol and water 2. Dissolve a tablespoon of sugar in a saucepan containing about 3 cm of water. Put at least 6 ice cubes in another clean and dry saucepan. Heat the first saucepan, and when the water comes to a rolling boil, hold the second saucepan tilted over the escaping water vapour, after having placed a third container (preferably a glass) underneath it, as shown in the diagram. Do this until a few drops of liquid are deposited in the glass. a) Note everything you observe during the heating process. b) Taste the liquid that has been deposited in the glass and note your observations. c) What do you call the process you?ve just observed? d) Explain what happened during the process.
Q. Show Uses of Sulphur? Sulphur is used in the manufacture of sulphur dioxide, sulphuric acid, and gunpowder. Match. fertilisers, drugs, bleaching agents, leather and other pr
The atomic number of an element is 35. What is the total number of electrons present in all the p-orbitals of the ground state atom of that element: (1) 6 (2) 11
Q. Determine the Ionization in Solutions? Ans. Ionic compounds dissolve in water because the polar water molecule pulls apart the ions of the ionic compound. This process
Which of the following electronic configuration is not possible: (1) 1s 2 2s 2 (2) 1s 2 2s 2 2p6 (3) [Ar]3d 10 4s 2 4
How does it help in stabilising a structure Ans) More alpha hydrogens more hyper conjugations More hyper conjugation more is the stability Less inductive effect more hyper
Q. Discuss the classification of polymers. OR How are polymers classified? Explain with suitable examples. Ans. Polymers are classified on th
Atoms in the water molecule are linked by: (1) Electrovalent bond (2)Covalent bond (3) Coordinate covalent bond (4) Odd electron bond Ans: Cov
nomenclature, formation,and reaction of glycerol
Explain classification of arches according to shapes raw a neat sketch of Flemish bond (1 brick wall and 1.5 brick wall thickness ).
ORIGIN AND ABUNDANCE OF THE ELEMENTS The synthesis of elements needs nuclear reactions, of which the most important type is the fusion of two light nuclei to prepare one of
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