Consider the following two statements : (A) Line spectra contain information about atoms. (B) Band spectra contain information about molecules.

Ratio of number of moles 1 /1 ∶ 8/ 16  Number of moles = Mass / Atomic mass Number of moles of hydrogen = 1/ 1 = 1  Number of moles of oxygen...

1 mole of oxygen atoms = 6.023×1023 atoms  ∴Number of moles of oxygen atoms =   2.58 ×1024 / 6.022×1023                             ...

8 corner × 1/8 atom per unit cell = 1 atom  There are four body diagonals in a cubic unit cell and each has two body centre atoms.  So, 4 × 2...

(b) A is correct but B is wrong. Explanation: Let the emfs of the batteries be e1 and e2, and their respective resistances be r1 and r2.  Since the batteries are connected in series,...

(c) B is correct but A is wrong.

(c) The first electric telegraph line in India was started between Kolkata and Diamond Harbour in 1850 and first export zone of India set up in Kandla in 1965.

1 mole of S8 molecules = 6. 022x1023 molecules  0.1 mole of S8 molecules = 6. 022x1023 x 0.1 = 6.022 x 1022 molecules  One molecule of S8 contains 8 atoms of...

(a) Dipole-Dipole interactions. (b) H-Bond. (c) Dispersion forces. (d) Dispersion forces. (e) Dispersion forces. (f) Induced dipole-dipole interactions.

(d) Only statement 3 is correct. An air conditioner (often referred to as AC) is a home appliance, system, or mechanism designed to dehumidify and extract heat from an area....

(B) isotopes