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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)
Steam Distillation - Purification of Organic Compounds This technique is applicable for the separation and purification of those organic compounds that are solids or liquids wh
Molecular formula of gaseous hydrocarbons (Eudiometry) Eudiometry is a direct method for calculation of molecular formula of gaseous hydrocarbons without ascertaining the pe
How many octahedral and tetrahedral voids are present in HCP? Ans) octa -no of atoms prsnt ,nd tetra -twice of it.
OXYGEN Oxygen is the second most electronegative substance after fluorine, and forms thermodynamically stable compounds with usually all elements. It rivals fluorine in the abil
Q. What is paired comparison test? In paired comparison test, the assessor is presented with two products and asked to indicate whether there is a preference between them.
Why is Zinc not extracted from ZInc oxide throgh reduction with CO?? Ans) Reducing agent should have more negative ΔG value. In case of zinc oxide ,Zn has more negative ΔG value t
According to Heisenberg's uncertainty principle, the product of uncertainties in position and velocities for an electron of mass 9.1x 10 -31 kg is: (1) 2.8x 10 -3 m 2 -s -1
covalent bond
The amount of energy needed to convert one mole of solid substance to vapor state is known as Sublimation energy
which element have highest oxidation number and why?
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