Iodine molecules are held in the crystals lattice by…
a. London forces
b. Dipole- dipole interaction
c. Covalent bonds
d. Coulombic forces
Ans.a
Explanation : Iodine molecules are a class of non polar molecular solid in which constituents Hence value of refractive index is same in all directions can be measured and not be equal to zero always.
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dm-3 sucrose solution at 20 ° C (molar gas constant, R = 8.314 JK -1 mol -1 ; 1 dm-3 = 0.001 m3 ) a. 4870 Pa b. 4.87 Pa c. 0.00487 Pa d. 0.33 Pa Ans. a (17)
