Oxidation states of P in H4P2O5, H4P2O6, H4P2O7, are respectively
+3, +5, +4
+5, +3, +4
+5, +4,+3
+5, +4,+3
The correct order of increasing bond angles in
Cl2O < ClO2 < ClO2-
ClO2 <Cl2O< ClO2-
Cl2O < ClO2- < ClO2
Cl2O < ClO2- < ClO2
25.3 g of sodium carbonate, Na2CO3 is dissolved in enough water to make 250 mL of solution. If sodium carbonate dissociates completely molar concentration of sodium ion, Na+ and carbonate ion, CO32- are respectively (Molar mass of Na2CO3 = 106 g mol-1)
0.955 M and 1.910 M
1.910 M and 0.955 M
1.90 M and 1.910 M
1.90 M and 1.910 M
The existence of two different coloured complexes with the composition of [Co(NH3)4Cl2]+ is due to
linkage isomerism
geometrical isomerism
Coordination isomerism
Coordination isomerism
During the kinetic study of the reaction, 2A + B --> C+ D, following results were obtained
|
[A]/mol L- |
[B]/ mol L- |
Initial rate of formation of D/ mol L- min- |
I |
0.1 |
0.1 |
6.0 x 10-3 |
II |
0.3 |
0.2 |
7.2 x 10-2 |
III |
0.3 |
0.4 |
2.88 x 10-1 |
IV |
0.4 |
0.1 |
2.40 x10-2 |
rate = k[A]2[B]
rate = k [A][B]
rate = k[A]2[B]2
rate = k[A]2[B]2
Which one of the following species does not exist under normal conditions?
(+)Sucrose
(+)Lactose
(+) Maltose
(+) Maltose
Given are cyclohexanol (I), acetic acid (II), 2,4,6-trinitropenol (III) and phenol (IV). In these, the order of decreasing acidic character will be
III > II> IV> I
II > III> I > IV
II > III> IV> I
II > III> IV> I
Which one is most reactive towards SN1 reaction?
C6H5CH(C6H5)Br
C6H5CH(CH3)Br
C6H5C(CH3)(C6H5)Br
C6H5C(CH3)(C6H5)Br
C.
C6H5C(CH3)(C6H5)Br
SN1 reaction involves the formation of carbocation intermediate. More the stability of carbocation more is the reactivity of alkyl/aryl halides towards SN1 reaction.
The intermediate carbocations formed by given halides as:
Thus, C6H5C(CH3)(C6H5)Br is most reactive towards SN1 reaction.
Which one of the following is employed asa tranquilizer drug?
Promethazine
Valium
Naproxen
Naproxen