Chemistry

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New answer posted

7 months ago

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V
Vishal Baghel

Contributor-Level 10

Blood – Negatively charged colloid.

According to Hardy – Schulze Rule

FeCl3 is more efficient for blood clotting

New answer posted

7 months ago

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V
Vishal Baghel

Contributor-Level 10

Valium – Tranquilizer

Morphine – Analgesic

Norethindrone – Antifertility drug

Vitamin B12 – Pernicious anaemia

New answer posted

7 months ago

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V
Vishal Baghel

Contributor-Level 10

Density =  m a s s v o l u m e

Cu > Co > Fe > Cr > Zn

New answer posted

7 months ago

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A
alok kumar singh

Contributor-Level 10

(1) C r + 1 = 4 s 0 3 d 5 M n + 2 = 4 s 0 3 d 5  

(2)    N i + 2 = 4 s 0 3 d 8 C u + = 4 s 0 3 d 1 0

(3) F e + 2 = 4 s 0 3 d 6 C o + = 4 s 1 3 d 7  

(4)  V + 2 = 4 s 0 3 d 3 C r + = 4 s o 3 d 5

New answer posted

7 months ago

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A
alok kumar singh

Contributor-Level 10

Freundlich adsorption Isotherm

( x m ) = k ( P ) 1 n           

At moderate pressure ;  x m varies non-linearly with P.

So, x = 1 n  

New answer posted

7 months ago

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A
alok kumar singh

Contributor-Level 10

l + H 2 O 2 + 2 H + l 2 + 2 H 2 O

  (-1)                 oxidation       (0)

Here, I- is reducing agent

H 2 O 2   behaves like oxidizing agent

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7 months ago

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P
Payal Gupta

Contributor-Level 10

Cu+ = 3d9 4s0

n = 1

μ = 1 * ( 1 + 2 ) = 3 = 1 . 7 3 B M

the nearest integer is 2.

New answer posted

7 months ago

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A
alok kumar singh

Contributor-Level 10

In Ce & Eu (+3) oxidation state is more stable

? C e + 4 + e ? ? C e + 3 ( R e d u c t i o n )     so CeO2 is oxidising agent

E u + 2 ? E u + 3 + e ? ( o x i d a t i o n ) so EuSO4 is reducing agent

New answer posted

7 months ago

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A
alok kumar singh

Contributor-Level 10

(1) H e 2 σ 1 s 2 σ 1 s * 2 σ 2 s 1 B . O = 3 2 2 = 1 2  

(2)    H e 2 + σ 1 s 2 σ 1 s * 1 B . O = 2 1 2 = 1 2

(3) B e 2 σ 1 s 2 σ 1 s * 2 σ 2 s 2 σ 2 s * 2 B . O = 4 4 2 = 0  

So Be2 does not exits

 

New answer posted

7 months ago

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P
Payal Gupta

Contributor-Level 10

E = h c λ = { 6 . 6 3 * 1 0 3 4 * 3 * 1 0 8 6 6 3 * 1 0 9 }

= 0.03 * 10-17 = 3.0 * 10-19 J/atom

= 18.06 * 101 kJ/mole = 180.6 181 KJ/mole

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