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Lanthanide contraction
write a short note on colour and constitution
feature of s, p, d,f block in periodic table
density of gas is 2.86 ltr.the gas may be-
Atoms in the water molecule are linked by: (1) Electrovalent bond (2)Covalent bond (3) Coordinate covalent bond (4) Odd electron bond Ans: Cov
If uncertainty in the position of an electron is zero, the uncertainty in its momentum would be: (1) Zero (2) (3) > h/ 2γ (4) Infinite
A compound is prepared by two elements N and M. The element N forms ccp structure and atoms of M occupy 1/3rd of tetrahedral voids. Determine the formula of the compound ?
Explain the process of Grading and Sieving Grading: Grading consists of separating the sound kernels from chaff and impurities,and may be achieved by sieving or winnowing.
Which of the following compounds are covalent: (1) H 2 (2) CaO (3) KCL
10 g of h2 and 64 g of o2 are filled in a steel vessel and exploded amount of water produced in this reaction
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