The oxidation states of sulphur in the anions : SO₃²⁻,S₂O₄²⁻ and S₂O₆²⁻ follow the order
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(a) S₂O₄²⁻ < SO₃²⁻ < S₂O₆²⁻ (b) SO₃²⁻ < S₂O₄²⁻ < S₂O₆²⁻ (c) S₂O₄²⁻ < S₂O₆²⁻ < […]
Phospholipids are esters of glycerol with
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(a) three carboxylic acid residues (b) two carboxylic acid residues and one phosphate group (c) one carboxylic acid residue and two phosphate group (d) three phosphate […]
The basic character of the transition metal monoxides follows the order (Atomic nos. Ti = 22, V = 23, Cr = 24 , Fe = 26)
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(a) VO > CrO > TiO […]
According to IUPAC nomenclature sodium nitroprusside is named as
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(a) sodium nitroferricyanide (b) sodium nitroferrocyanide (c) sodium pentacyanonitrosyl ferrate (II) (d) sodium pentacyanonitrosyl ferrate (III)
Correct Answer:
sodium pentacyanonitrosyl ferrate (II)
Explanation: […]
The pyknometric density of sodium chloride crystal is 2.165 x 10³ kg m⁻³, while its X-rays density is 2.178 x 10³ kg m⁻³. The fraction of unoccupied sites in sodium chloride crystal is
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If a full wave rectifier circuit is operating from 50 Hz mains, the fundamental frequency in the ripple will be
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(a) 50 Hz (b) 70.7 Hz (c) 100 Hz (d) 25 Hz
Correct […]
A ball rolls without slipping. The raidus of gyration of the ball about an axis passing through its centre of mass is K. If the raidus of ball be R, then the fraction of total […]
A sample of radioactive element has a mass of 10 gram at an instant t=0. The approximate mass of this element in the sample after two mean lives is
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(a) 2.50 gram (b) […]
The vector sum of two forces is perpendicular to their vector difference. In that case, the forces
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(a) Are equal to each other in magnitude (b) Are not equal to each other […]
A stationary particle explodes into two particles of masses m₁ and m₂ which move in opposite directions with velocities v₁ and v₂. The ratio of their kinetic energy is
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(a) m₂/m₁ (b) […]
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