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 of the following compounds has the most acidic nature?
B.
The presence of electron withdrawing substituent increases the acidity while electron releasing substituent, when present, decrease the acidity.
Phenyl is an electron withdrawing substituent while -CH3 is an electron releasing substituent, Moreover, phenoxide ion is more resonance stabilised as compared to benzoyl oxide ion, thus, release proton more easily. That's why is a strong acid among the given.
Which one is most reactive towards SN1 reaction?
C6H5CH(C6H5)Br
C6H5CH(CH3)Br
C6H5C(CH3)(C6H5)Br
C6H5C(CH3)(C6H5)Br
Which one of the following is employed asa tranquilizer drug?
Promethazine
Valium
Naproxen
Naproxen