Chemistrypolymers2020easy
Preparation of Bakelite proceeds via reactions.
Chemistryd-and-f-block-elements2020easy
The set that contains atomic numbers of only
transition elements, is :
Chemistryd-and-f-block-elements2020easy
Mischmetal is an alloy consisting mainly of :
Chemistryd-and-f-block-elements2020easy
The lanthanoid that does NOT show +4 oxidation
state is :
Chemistryd-and-f-block-elements2020easy
In the sixth period, the orbitals that are filled are :
Chemistryd-and-f-block-elements2020medium
The correct electronic configuration and spin-only
magnetic moment (BM) of Gd3+ (Z = 64),
respectively, are :
Chemistryd-and-f-block-elements2020medium
The incorrect statement(s) among (a) - (c) is
(are)
(a) W(VI) is more stable than Cr(VI).
(b) In the presence of HCl, permanganate
titrations provide satisfactory results.
(c) Some lanthanoid oxides can be used as
phosphors.
Chemistryd-and-f-block-elements2020medium
The incorrect statement is :
Chemistryd-and-f-block-elements2020easy
5 g of zinc is treated separately with an excess
of
(a) dilute hydrochloric acid and
(b) aqueous sodium hydroxide.
The ratio of the volumes of H2 evolved in these
two reactions is :
Chemistryd-and-f-block-elements2020easy
The atomic radius of Ag is closed to :
Chemistryd-and-f-block-elements2020easy
The elements with atomic numbers 101 and 104
belong to, respectively :
Chemistrychemical-bonding-and-molecular-structure2020easy
The potential energy curve for the H2
molecule as a function of internuclear distance is :
Chemistrychemical-bonding-and-molecular-structure2020easy
The compound that has the largest H–M–H bond angle (M = N, O, S, C) is :
Chemistrychemical-bonding-and-molecular-structure2020easy
The structure of PCl5
in the solid state is :
Chemistrychemical-bonding-and-molecular-structure2020medium
The reaction in which the hybridisation of the
underlined atom is affected is :
Chemistrychemical-bonding-and-molecular-structure2020medium
The intermolecular potential energy for the
molecules A, B, C and D given below suggests
that :
Chemistrychemical-bonding-and-molecular-structure2020medium
Of the species, NO, NO+, NO2+ and NO-
, the one with minimum bond strength is :
Chemistrychemical-bonding-and-molecular-structure2020medium
The shape / structure of [XeF5]– and XeO3F2,
respectively, are
Chemistrychemical-bonding-and-molecular-structure2020easy
Match the type of interaction in column A with
the distance dependence of their interaction
energy in column B
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A
B
(i) ion-ion
(a) {1 \over r}
(ii) dipole-dipole
(b) {1 \over {{r^2}}}
(iii) London dispersion
(c) {1 \over {{r^3}}}
(d) {1 \over {{r^6}}}
Chemistrychemical-bonding-and-molecular-structure2020easy
The relative strength of interionic/intermolecular forces in decreasing order is :