Beet root if kept in cold water anthocyanin does not come out due to plasma membrane
Options
(a) Differentially permeable (b) Impermable to anthocyanins (c) Permeable to anthocyanins (d) Dead
Correct Answer:
Impermable to […]
Radius of a soap bubble is increased from R to 2R. Work done in this process in terms of surface tension S is
Options
(a) 24 πR²S (b) 48 πR²S (c) 12 πR²S (d) […]
What is the pressure of 64g O₂ enclosed in a cylinder of 20 litres at 27⁰C
Options
(a) 2.5 atm (b) 2 atm (c) 2.75 atm (d) 3 atm
Correct Answer:
2.5 atm
A particle is executing the motion x=Acos (ωt-θ). The maximum velocity of the particle is
Options
(a) Aω cosθ (b) Aω (c) Aω sinθ (d) None of these
Correct Answer:
Aω
Explanation:
x = […]
Position of hydrogen in periodic table is such that it can be placed in
Options
(a) both 1st and 17th group (b) only 1st group (c) only 17th group (d) neither in 1st […]
In the following change,KMnO₄ → MnO₂, the oxidation state of Mn changes as
Options
(a) 7 → 4 (b) 5 → 2 (c) 7 → 5 (d) 3 → 7
Correct Answer:
7 […]
When temperature of an ideal gas is increased from 27⁰C to 227⁰C, its r.m.s. speed changes from 400 m/s to Vs. The Vs is
Options
(a) 516 m/s (b) 450 m/s (c) 310 […]
The percent law of energy transfer, in a food chain, was enunciated by
Options
(a) Lindeman (b) Haeckel (c) Elton (d) Schimper
Correct Answer:
Lindeman
Explanation:
No explanation available. Be the first to […]
Choose the correct statements
Options
(a) [Cr(NH₃)₆]³⁺ is diamagnetic (b) Oxidation state of Ni in [Ni(CO)₄] complex is zero (c) Ligands are generally electron acceptors (d) Chelating complexes are formed by monodentate ligands […]
The role of cryolite in the metallurgy of extraction of aluminium is to
Options
(a) increase the conductivity of the electrolyte (b) decrease the melting point of electrolyte (c) both (increases the conductivity […]
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