(b) is always greater than that of the Celsius thermometer
   (c) is always less than that of the Celsius thermometer
   (d) may be greater than or less than or equal to that of the Celsius
       thermometer
Ans: (d)
99.Mercury is used in thermometers because
   (a) it has high thermal conductivity
   (b) it has uniform expansivity
   (c) it has high boiling point and low freezing point
   (d) of all the above
Ans: (d)
100. At what temperature do the Fahrenheit and Celsius scales give the same
   reading?
   (a) 212°
   (b) 32°
   (c) -40°
   (d) 0°
Ans: (c)
101. At what temperature do the Fahrenheit and Kelvin scales give the same
   reading?
   (a) 212°
   (b) 32°
   (c) -40°
   (d) 0°
Ans: (d)
102. In very cold countries alcohol is used as a thermometric liquid because
   (a) alcohol is a poor conductor of heat
   (b) alcohol can be coloured for its level to be seen easily
   (c) its freezing point is very low
   (d) it will not stick to the glass tube
Ans: (c)
103. On the Kelvin scale, the melting point of ice is
                                           68