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During a flame test why is calcium''s flame not persistent, while that of strontium is?
Ans) Because it does not have many ions as compared to the Strontium. It is the ions which produce color.
The number of unpaired electrons in a chromic ion Cr 3+ (atomic number = 24) is: (1) 6 (2) 4 (3) 3 (4) 1 Ans: 3
preparation of succinic and oxalic acid
can i have some problems regarding law of conservation of mass
According to Aufbau's principle, which of the three 4d, 5p and 5s will be filled with electrons first: (1) 4d (2) 5d (3) 5s (4) 4d and 5s will be filled simultaneo
Q. Early Theories of Matter? In ancient Greece philosophers discussed the nature of matter. The philosopher Democritus held that matter was composed of elementary particles cal
wht is the difference between molar mass & molecular mass?
Q. Show the chemical of Boron and aluminium? Boron and aluminium when heated with nitrogen torn the nitrides BN and AIN Nitrides of Ga and in are formed by heating the elements
The energy of an electron in orbit of hydrogen atom is : (1) 13.6/n 4 x eV (2) 13.6/n 3 xeV (3) 13.6/n 2 xeV (4)13.6/nx eV Ans:
Volume of diatomic gas is less than the monatomic gas , although diatomic gas has 2 moles ( 2 times atomes) than monoatomic gas ?? Ans) The answer is derived by avogadros law
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