Nucellar polyembryony is reported in species of
Options
(a) Gossypium (b) Triticium (c) Brassica (d) Citrus
Correct Answer:
Gossypium
Explanation:
The presence of more than one embryo in a seed is referred as […]
In which one of the following the genus name, its phylum name and its two characters are not correctly matched, whereas the remaining three are correct
Options
(a) Pila-Mollusca- body segmented, Mouth with […]
Standard enthalpy of vaporisation Δvap H⁰ for water at 100⁰C is 40.66 kJ mol⁻¹. The internal energy of vaporisation of water at 100⁰C (in kJ mol⁻¹) is
Options
(a) 37.56 (b) -43.76 (c) 43.76 […]
The enthalpy of fusion of water is 1.435 kcal/mol.The molar entropy change for the melting of ice at 0⁰C is
Options
(a) 10.52 cal/(mol-K) (b) 21.01 cal/(mol-K) (c) 5.260 cal/(mol-K) (d) 0.526 cal/(mol-K)
Correct […]
In which of the following reaction standard entropy change (ΔS⁰) is positive and standard Gibb’s energy change (ΔG⁰) decreases sharply with increasing temperature
Options
(a) C (graphite) + 1/2 O₂(g) → CO(g) (b) CO(g) […]
If the radius of star is R and it acts as a black body, what would be the temperature of the star, in which the rate of energy protection is Q?
Options
(a) Q […]
Which one of the following reagents will be able to distinguish between 1-butyne and 2-butyne
Options
(a) NaNH₂ (b) HCl (c) O₂ (d) Br₂
Correct Answer:
NaNH₂
Explanation:
No explanation available. Be the […]
The damping force on an oscillator is directly proportional to the velocity. The units of the constant of proportionality are:
Options
(a) kgms⁻¹ (b) kgms⁻² (c) kgs⁻¹ (d) kgs
Correct Answer:
kgs⁻¹
Explanation: […]
A mixture of potassium chlorate, oxalic acid and sulphuric acid is heated.During the reaction which element undergoes maximum change in the oxidation number
Options
(a) S (b) H (c) Cl (d) C
Correct […]
When Cl₂ gas reacts with hot and concentration sodium hydroxide solution,the oxidation number of chlorine changes from
Options
(a) zero to +1 and zero to -5 (b) zero to -1 and zero to […]
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