Chloroacetic acid is a stronger acid than aceticacid.
This can be explained using ______
- M effect
+ M effect
- I effect
Considering the reaction C(S) O2(g)¾® CO2(g)393.
5 kJ the signs of DH , DS and DG respectively are
+, -, -
-, +, +
-, -, -
-, +, -
Enthalpy of vapourization of benzene is 35.3 kJ mol-1 at its boiling point of 80°C.The entropy change in the transition of the vapour to liquid at its boiling point[in JK-1 mol-1] is ______
I effect is shown by
Which one of the following statements is not true regarding ( ) Lactose
(+) Lactose is reducing sugar and does not exhibit mutarotation
(+) Lactose, C12H22O11 contains 8-OH groups
On hydrolysis (+) Lactose gives equal amount of D(+) glucose and D(+) galactose
The electronic configuration of Cr3 is
Using the extraction of gold the following reactions take placeAu CN- H2O [X][X] Zn ¾® [Y] AuX and Y are respectively
[Au(CN)4]3- and [ZN(CN)4]2-
[Au(CN)4]2- and [ZN(CN)4]2-
[Au(CN)2]- and [ZN(CN)6]4-
[Au(CN)2]- and [ZN(CN)4]2-
The d-electron configurations of Cr2 , Mn2 , Fe2 and Co2 are d4, d5, d6 and d7respectively.
Which one of the following will exhibit minimum paramagnetic behaviour?
Cr = 24, Mn = 25, Fe = 26, Co = 27)
A complex compound in which the oxidation number of a metal is zero is
K4 [Fe (CN)6]
[Pl (NH3 )4]Cl2
K3 [Fe (CN)6]
Of the following complex ions, which is diamagnetic in nature
The standard electrode potential for the half cell reactions are:Zn 2e- ¾¾¾® Zn E° = - 0.76 VFe 2e- ¾¾¾® Fe E° = - 0.44 VThe
E.M.F. of the cell reaction :Fe Zn ¾¾¾® Zn Fe is
Standard electrode potential for Sn4 / Sn2 couple is 0.15 V and that for the Cr3 / Cr couple is –0.74
V. These two couples in their standard state are connected to make acell.
The cell potential will be
In chromite ore, the oxidation number of iron and chromium are respectively ______
Enthalpy change for the reaction, 4H(g) ® 2H2(g) is –869.
6 kJ. The dissociation energy of H – H bond is
The energies E1 and E2 of two radiations are 25 eV and 50 eVrespectively.
The relation between their wavelengths
i.e. and will be
If x is amount of adsorbate and m is amount of adsorbent, which of the following relations is not related to adsorption process
= f(T) at constant p
=f(p) at constant T
= P ´ T
p = f(T) at constant
Mole fraction of the solute in a 1.00 molal aqueous solution is
cm3 of 0.1 N monobasic acid requires 15 cm3 of sodium hydroxide solution whose normality is
The following data is obtained during the first order thermal decomposition of 2A(g) B(g) C(s) , at constant volume andtemperature.
Sr. No. Time Total pressure in Pascal1 At the end of 10 minutes 300 3002 After completion 200 200The rate constant in min-1 is ______
A body of mass x kg is moving with a velocity of 100 ms-1. Its de Broglie wavelength is 6.62 ´ 10-35m.
Hence x is (h = 6.62 ´ 10-34Js)
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