Chemistry MCQs Chapter 4 book 1

1.     Vapor pressure of diethyl ether at 0⁰C is approximately

a)     4.8 torr

b)    100 torr

c)     200 torr

d)    250 torr

2.     Lattice energy for the formation of NaCl crystal is

a)     -787KJmol^-1

b)    +787KJmo^-1

c)     -787 KCalmol^-1

d)    +787 Calmol^-1

3.     Crystallographic elements are determined for any crystalline substance which decides its structure, the best technique used for this purpose is

a)     Mass spectrometer

b)    Barometer

c)     X-ray diffraction

d)    None of these

1.c

2.a

3.c