1 mole of gas occupying 3 L volume is expanded against a constant external pressure of 1 atm to a volume of 15 L. The work done by a system is equal to
-1.215 × 103 J
-12.15 × 103 J
+1.215 × 103 J
+12.15 × 103 J
The value for Cr, Mn, Fe and Co are -0.41, +0.77 and +1.97 V respectively. For which one of these metals the change in oxidation state from +2 to +3 is easiest?
Cr
Mn
Fe
Co
The oxidation numbers of phosphorus in Ba(H2PO2) and xenon in Na4XeO6 respectively are
+3 and +4
+2 and +6
+1 and +8
-1 and -6
Setting of plaster of Paris is
dehydration
oxidation with atmospheric oxygen
combination with atmospheric CO2
hydration to yield another hydrate
In the following compound, groups designated as A, B, C will be numbered as
3, 2, 1
6, 1, 2
3, 1, 2
1, 2, 3
The following compound can exhibit
geometrical isomerism
geometrical and optical isomerism
optical isomerism
tautomerism
The IUPAC name for
CH3CH=CHCH2C(NH2)H-CH2-COOH
5-amino-2-heptenoic acid
5-amino hex-2-ene-carboxylic aod
3-amino-5-heptenoic acid
β-amino-δ-heptenoic acid
Petroleum is obtained from water gas, name of the reaction involved is
Fischer-Tropsch
Benzoic
Dow's
Kjeldahl's
A.
Fischer-Tropsch
In this method carbon monoxide needed is made by passing steam over red hot coke. The water gas thus obtained is mixed with hydrogen and passed at a pressure of 5 - 10 atm into a chamber containing a cobalt catalyst at 200°C.
nCO + (2n + 1) H2 CnH2n + 2 + 4H2O
The product is a mixture consisting mainly of liquid hydrocarbons.
Which of the following is correct increasing order for the value of ?
e < p < n < α
n < p < e < α
n < p < α < e
n < α < p < e