s block elements, Chemistry

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Correct set of four quantum numbers for valence electron, Correct set of fo...

Correct set of four quantum numbers for valence electron of rubidium (Z = 37) is: (1)  5,0,0,+1/2                    (2)  5, 1,0,+1/2    (3)  5,1,1,+1/2

Number of unpaired electrons in inert gas is, Number of unpaired electrons ...

Number of unpaired electrons in inert gas is: (1) Zero         (2) 8        (3) 4                (4) 18 Ans: Zero

Ch 2 atomic structure of class 11, If the velocity of hydrogen molecule is5...

If the velocity of hydrogen molecule is5*10^4 cm/sec tjen its de broglie wavelength is

Edta, #questionQ1. 0.28gm of CaCO3 was dissolved in HCl and the solution wa...

#questionQ1. 0.28gm of CaCO3 was dissolved in HCl and the solution was made to one litre with distilled water. 100 ml of the above solution required 28 ml of EDTA solution on titra

Define bond angle, The angle among the lines joining the nuclei of the bond...

The angle among the lines joining the nuclei of the bonded atom with a central atom is known as bond angle.

The energy of a photon is calculated, The energy of a photon is calculated ...

The energy of a photon is calculated by: (1) E= hv (2) h= Ev (3) h = E/v (4) E= h/v Ans: E= hv

Coordination compounds- hybridisation, In coordination compounds , how to d...

In coordination compounds , how to decide whether itss hybridisation will be sp3d2 or d2sp3.. itss based on inner or outer orbital complex but how will we got to know that for ever

What are metal oxides and oxoanions?, The elements of first transition seri...

The elements of first transition series from variety of oxides of different oxidation states having general formulae  MO, M 2 O 3 , M 3 O 6 , MO 2 , MO 3 . These oxides are gene

What is happen when h2so4+hno3 adding to the phenol?, Phenol + HNO3(in pres...

Phenol + HNO3(in prescence of sulphuric acid) --> 2-nitrophenol + 4-nitrophenol.

Number of unpaired electron, Number of unpaired electrons in  Mn 4+ is: ...

Number of unpaired electrons in  Mn 4+ is: (1) 3        (2) 5         (3) 6       (4) 4 Ans: 3

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