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Q. Reactions with metals?
Ans.
Halogens commonly undergo reactions with metals. Halogens react with the alkali metal family, Group IA in the periodic table. For example, chlorine reacts with potassium hydroxide to form potassium chloride and potassium hypochlorite.
Cl2 + 2KOH -> KCl + KOCl + H2O
Many metals burn in chlorine to form metal chlorides. When sodium burns with chlorine, a yellow flame and white smoke are observed:
2Na(s) + Cl2(g) -> 2NaCl(s)
Q. Effectiveness of blanching by peroxidase inactivity test? • check the adequacy of the blanching process, • appreciate the importance of time-temperature relationship i
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Delocalisation of electrons in conjugated system is called resonance. For example there is delocalisation of electrons in benzene ,hence we write kekule structure for benzen.
Wet test for basic radicals
The atomic number of an element having the valency shell electronic configuration 4s 2 4p 6 is: (1) 35 (2) 36 (3) 37 (4) 38 Ans: 35
ionic bond has low energy
A sample of water contains: suspended matter = 100 mg; Ca(NO3)2 = 16.4 mg/L; MgSO4 = 24 mg/L; MgCl2 = 19 mg/L; NaOH = 40 mg/L and KOH = 56 mg/L. Calculate temporary, permanent and
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Q. Describe Structure of Solids? Ans. Solids are different from gases and liquids because they have a fixed shape. This definite shape occurs as the individual particles w
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