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Kshitij Gaur

Subject: Chemistry, asked on 15/10/17

Answer this
Q. In what cases is the reduced form of an electrode more stable than hydrogen gas?

Aishwarya Trivedi

Subject: Chemistry, asked on 6/10/17

Please answer correctly
Q. When electricity is passed through a solution of $A l C l_{3}$ , 13.5 g of Al is discharged. The amount of charge passed is :
1. 1.5 F
2. 0.5 F
3. 1.0 F
4. 2.0 F

Ayesha Jahan

Subject: Chemistry, asked on 4/10/17

4th 'last' question

Q. Explain Frenkel and Schottky defects

Ayesha Jahan

Subject: Chemistry, asked on 3/10/17

Solve this:
Calculate charge in coulombs involved to get 40.5 gm of Al from molten A1₂O₃. (At. mass of Al=27g/mol )

Ayesha Jahan

Subject: Chemistry, asked on 3/10/17

Solve this:
Q- Why is ethylene glycol added to water used in the car radiators in cold regions?
Q- What is electrochemical series?
Q- State the difference between potential difference and E.M.F of a cell.

Aditi

Subject: Chemistry, asked on 2/10/17

a) What is primary cell? Illustrate with the help of example.
$b) C a l c u l a t e t h e p o t e n t i a l o f t h e f o l l o w i n g c e l l r e a c t i o n a t 298 K . i S n^{4 +} (1.50 M) + Z n (s) \to S {n^{2}}^{+} (0.50 M) + Z n^{2 +} (2.0 M) T h e s \tan d a r d p o t e n t i a l E ° o f t h e c e l l i s 0.89 V . W h e t h e r t h e p o t e n t i a l o f c e l l w i l l i n c r e a s e o r d e c r e a s e, i f c o n c e n t r a t i o n o f S n^{4 +} i s i n c r e a s e d i n t h e c e l l ? C a l c u l a t r E M F o f t h e c e l l .$

Mitali

Subject: Chemistry, asked on 30/9/17

Kindly tell "how" to find when does ZnO act as an acid and a base
Q. In the following reactions, ZnO is respectively acting as a/an :
(a) $Z n O + N a_{2} O \to N a_{2} Z n O_{2}$
(b) $Z n O + C O_{2} \to Z n C O_{3}$
A) base and base
B) acid and acid
C) acid and base
D) base and acid

Akansha Karvekar

Subject: Chemistry, asked on 22/9/17

$1 . C a l c u l a t e t h e m a x i m u m w o r k w h e n 24 g o f o x y g e n a r e e x p a n d e d i s o t h e r m a l l y a n d r e v e r s i b l y f r o m a p r e s s u r e o f 1.6 \times 10^{5} P a t o 100 k P a a t 298 K . T h r e e m o l e s o f a n i d e a l g a s a r e c o m p r e s s e s i s o t h e r m a l l y a n d r e v e r s i b l y t o a v o l u m e o f 2 L .$

Shrishty

Subject: Chemistry, asked on 18/9/17

i) explain how arsenic doped germanium is a n- type semiconductor
ii)explain the following terms: a) ferromagnetism b)antiferromagnetism

Shrishty

Subject: Chemistry, asked on 18/9/17

i) define molar conductivity of a solution and explain how molar conductivity changes with change in concentration of solution for a weak and a strong electrolyte
ii) how much electricity is required in coulomb for oxidation of 1 mole of H₂O to H₂
iii) the resistance of a conductivity cell containing 0.001M KCl solution at 298K is 1500 ohm what is the cell constant if the conductivity of 0.001 M KCl at 298K is 0.146*10^-3 Scm

Shivam Sharma

Subject: Chemistry, asked on 17/9/17

Plz answer the qn and don't give a link for similar query.

Poonam Tripathi

Subject: Chemistry, asked on 16/9/17

Q. $P_{4} + K O H + H_{2} O \to$

Poonam Tripathi

Subject: Chemistry, asked on 16/9/17

(11) Calculate the cell potential of a galvanic cell whose cell representation is:
Mg_(s) | Mg²⁺(0.1 M) || Cu²⁺(0.01 M) | Cu_(s). Given that E⁰_Mg2+/Mg = - 2.36V, E⁰_Cu2+/Cu = 0.34 V.

Shivam Sharma

Subject: Chemistry, asked on 15/9/17

Solve this:

Alifa

Subject: Chemistry, asked on 15/9/17

Calculate the emf of the following cell at 298 K 2Cr + 3Fe2+ (0.1)M ----> 2Cr3+ (0.01M) + 3Fe

E^- Cr3+ / Cr = -0.74v

E^- Fe2+/Fe = -o.44v

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