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Q. Show the Occurrence of the f-block element? Apart from promethium which is unstable and is found in traces in uranium ores, all the lanthanides usually occur together. Altho
what is chemical cobination
a sophisticated ultra/visible/near-IR instrument has a wavelenght range of 185 TO 3000 nm.What are its Wave number and frequency ranges ?
give the melting temperature values of group 2 elements
How to find atomicity
SOME SILVER MINES DUMP SHREDDED IRON CANS INTO PONDS CONTAING DISSOLVED SILVER SALTS. WRITE THE TWO HALF REDOX REACTIONS AND THE OVERALL BALANCED REACTION THAT EXPLAINS THE DEPOSIT
Uses of Benzoic Acid - carboxylic acids (i) Benzoic acid is used in medicine in the form of its salts particularly as urinary antiseptic. (ii) Benzoic acid is used as sodium
The nature of bonding in graphite is: (1) Covalent (2) Ionic (3) Metallic (4) Coordinate Ans: Covalent
what is laws of chemical combination
Enthalpy, H, is defined by the relationship H=U+pV. The enthalpy change, ΔH, for finite changes at constant pressure is given by the expression ΔH = ΔU+pΔV, so making the enthalpy
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