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Steam supply for experiments in heat
A tin with a press-on lid may be used to make a steam can. Punch two holes in the lid and solder by them one long and one short pipe as shown in the diagram. The long pipe serves as a safety valve and the short single supplies steam to the experiment (by a rubber tube attached). When the tin leaks or becomes rusty the similar lid may be transferred to a same tin.
general principal for extraction of metals
o.5oog of a sample which contains copper is analyzed iodometrically. Copper(II) is reduced to copper(I) by the iodide. What is the percent copper in the sample if 20.00cm3 of 0.1 m
The nucleus of an element contains 9 protons. Its valency would be : (1) 1 (2) 3 (3) 2 (4) 5 Ans: 1
what is mean by group displacement law?
How many unpaired electrons are present in cobalt [Co] metal: (1) 2 (2) 3 (3) 4 (4) 7 Ans: 3
ABAOUT ANY MAGNATIC CALCULATION OF TRANSAYION ELEMENT.
Q. Differentiate the thermoplastic and thermo sets. OR Write note on thermoplastic and thermosetting plastic resins. Ans. T
what risks are involved with the instrument
Formula of a metallic oxide is MO.The formula of its phosphate will be: (1) M 2 (PO 4 ) 2 (2) M (PO 4 ) (3) M 2 (PO 4 ) (4) M 3 (P
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