At 25⁰C, the dissociation constant of a base, BOH, is 1.0 ˣ 10⁻¹².
At 25⁰C, the dissociation constant of a base, BOH, is 1.0 ˣ 10⁻¹². The concentration of hydroxyl ions in 0.01 M aqueous solution of the base would be
Options
(a) 1.0 ˣ 10⁻⁵ […]
AIPMT2005
A drum of radius R and mass M, rolls down without slipping along an inclined plane
A drum of radius R and mass M, rolls down without slipping along an inclined plane of angle θ. The frictional force
Options
(a) Dissipates energy as heat (b) Decreases the rotational motion […]
The best method for the separation of naphthalene and benzoic acid from their
The best method for the separation of naphthalene and benzoic acid from their mixture is
Options
(a) distillation (b) sublimation (c) chromatography (d) crystallisation
Correct Answer:
sublimation
Explanation:
Sublimation method is used […]
The rate of reaction between two reactants A and B decreases by a factor of
The rate of reaction between two reactants A and B decreases by a factor of 4 if the concentration of reactant B is doubled. The order of this reaction with respect to reactant B is […]
The nuclei of which one of the following pairs of nuclei are isotones?
The nuclei of which one of the following pairs of nuclei are isotones?
Options
(a) ₃₄Se⁷⁴,₃₁Ga⁷¹ (b) ₃₈Sr⁸⁴,₃₈Sr⁸⁶ (c) ₄₂Mo⁹²,₄₀Zr⁹² (d) ₂₀Ca⁴⁰,₁₆S³²
Correct Answer:
₃₄Se⁷⁴,₃₁Ga⁷¹
Explanation:
Isotones means number of neutron remains same.
The number of moles of KMnO₄ reduced by one mole of KI in alkaline medium is
The number of moles of KMnO₄ reduced by one mole of KI in alkaline medium is
Options
(a) one (b) two (c) five (d) one fifth
Correct Answer:
two
Explanation:
No explanation available. Be […]
Electrolytic reduction of nitrobenzene in weakly acidic medium gives
Electrolytic reduction of nitrobenzene in weakly acidic medium gives
Options
(a) N-phenylhydroxylamine (b) nitrosobenzene (c) aniline (d) p-hydroxyaniline
Correct Answer:
p-hydroxyaniline
Explanation:
No explanation available. Be the first to write the explanation for […]
Four successive members of the first row transition elements are listed below
Four successive members of the first row transition elements are listed below with their atomic numbers.which one of them is expected to have the highest third ionisation enthalpy
Options
(a) Vanadium (Z = […]
In a face-centered cubic lattice, a unit cell is shared equally by how many unit
In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells
Options
(a) 2 (b) 4 (c) 6 (d) 8
Correct Answer:
6
Explanation:
No explanation available. Be […]
Copper has face centered cubic (fcc) lattice with interatomic spacing equal to 2.54Å.
Copper has face centered cubic (fcc) lattice with interatomic spacing equal to 2.54Å. The value of lattice constant for this lattice is
Options
(a) 2.54 Å (b) 3.59 Å (c) 1.27 Å (d) 5.08 […]