Chemistry - Online Test

x/m =k.p^1/n

 log(x/m )=logk+ 1/ n logp

y=c+mx

m = 1/n and c= logk

P:[Ne]3s23p3. Total valence electrons =5 so it will show +5 oxidation state. The stability of +5 oxidation state decreases down the group due to inert pair effect.

2 R - OH + 2Na→ 2 RONa + H₂↑2 moles of alcohol gives 1 mole of H₂ which occupies 22.4L at 273K and 1 atm

∴ number of moles of alcohol = ( 2 moles of R - OH / 22.4 L of H₂ ) × 560 mL

= 0.05 moles

∴ no. of moles = mass / molar mass

⇒ molar mass = 3.7/0.05 = 74 g mol⁻¹

General formula for R - OH C_n H_2n+1 - OH

∴ n(12) + (2n+1) (1) + 16+1=74

14n = 74 – 18

14n = 56

∴ n = 56/14 = 4

The 2 alcohol which contains 4 carbon is CH₂ CH(OH)CH₂CH₃

Chemistry does not deal in explaining superconductivity.

*In superconducting materials the charecteristics of superconductivity appear when the temperature is lowered below a critical temperature.

*The onset of superconductivity is accompanied  by abrupt changes in physical properties which are more related to phase transitions of the material .

These aspects of  studies in properties of materials  are better related to studies in the fields of Physics , eventhough  principles involved in Chemistry & Physics go hand to hand.