Everyday science Most repeated MCQs, for CSS, PMS, Inspector, ASI, Sub-inspector, Constable, FPSC, PPSC, ETEA, FIA, Police, Army, Navy, Airforce, IB, MOFA, ASF, LHC, Educators all other competitive exams and govt, private Jobs. most of these questions are also discussed on Pakmcqs official and Testpoint.pk. you can read the most repeated 100 MCQs, these questions get from past papers. If you want to download these most important EDS MCQs in PDF click mentioned button.
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C: Heating of Mercuric oxide powder: The heating of Mercuric oxide powder is a permanent change. We cannot get powder by revere reaction so it is a chemical change
Sublimation of Iodine: It is a physical change
Heating a platinum wire in a Bunsen flame: Platinum is a noble gas that cannot change its physical appearance after heating. So it is not a chemical change
Evaporation of Alcohol: It is a physical change. The liquid is changed into gas
The density of water depends on temperature and salt content. Density is measured as mass (g) per unit volume (cc). Water has the highest density at 3.98 ° C and the lowest density at 0 ° C (freezing point).
