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Class 12th Chemistry Coordination Compounds

Which of the following is the correct order of increasing field strength of ligands to form coordination compounds?

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alok kumar singh

Contributor-Level 10

Correct order of increasing field strength of ligands is : I^– < OH^–< NCS^–

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Class 12th Dual Nature of Radiation and Matter

de Broglie wavelength of proton = λ and that of an a particle is 2λ. The ratio of velocity of proton to that of a particle is:

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alok kumar singh

Contributor-Level 10

$? = \frac{h}{p}$

$? = \frac{h}{m v_{p}}$

and $2 ? = \frac{h}{4 m v_{?}}$

$\frac{1}{2} = \frac{4 v_{?}}{v_{p}}$

$\frac{v_{p}}{v_{?}} = 8$

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Class 12th Chemistry Coordination Compounds

The effective atomic number of Fe in K₄[Fe(CN)₆] is

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alok kumar singh

Contributor-Level 10

EAN = Atomic No. – Oxidation state + 2 * CN

= 26 – 2 + 2 * 6

=36

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Class 12th Chemistry

Which among the following is malachite?

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alok kumar singh

Contributor-Level 10

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Class 12th Physics

Determine the lowest energy of photon emitted in Balmer series of hydrogen atom.

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alok kumar singh

Contributor-Level 10

For 3 ->2 transitions

DE = 13.6 $(\frac{1}{4} ? \frac{1}{9})$

= 13.6 * $\frac{5}{36}$

= 1.88 eV

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Class 12th Solutions

If vapour pressure of two liquids A and B in pure state are 400 and 500 mm of Hg respectively then mole fraction of A in vapour phase of solution obtained by mixing equal moles of A and B is

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alok kumar singh

Contributor-Level 10

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Class 12th Chemistry Solutions

Which of the following aqueous solution has highest boiling point?

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alok kumar singh

Contributor-Level 10

Higher the value of (ixM), higher will be the boiling point of solution.

Solute

Glucose

NaCl

K₂SO₄

K4 [Fe (N)₆]

van't Hoff

factor (i)

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Class 12th Chemistry

Packing efficiency of fcc lattice is

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alok kumar singh

Contributor-Level 10

For FCC lattice

Packing efficiency =

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Class 12th Chemistry

The first co-ordination number of Cs⁺ in CsCl lattice is

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alok kumar singh

Contributor-Level 10

CsCl has BCC structure in which Cl^– is present at corners of cube and Cs⁺ at body centre

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Class 12th Physics

The length of a potentiometer wire is ?. A cell of emf E is balanced at a length ?/4 from the positive end of the wire. If the length of the wire is increased by ?/2, at what distance will the same cell give a balanced point? (Potentiometer battery is ideal)

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alok kumar singh

Contributor-Level 10

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