81. Pressure cooker cooks food in lesser time because
82. . . . . . . . . is not related to gases.
83. Under which condition real gas can work as an ideal gas?
84. According to Newton's Law of Cooling the rate of cooling of a body is proportional to the
85. When a glass rod is placed in steam, its length increases but its width
86. The normal temperature of a human body is . . . . . . . .
87. Assertion (A): A piece of ice added to the drink, cools it.
Reason (R): Ice takes latent heat from the drink for melting resulting in the cooling of the drink.
Select the correct answer:
Reason (R): Ice takes latent heat from the drink for melting resulting in the cooling of the drink.
Select the correct answer:
88. Below is a statement (A) and a reason (R)-
(A): Left a small gap between tracks
(R): Iron spread in summer.
(A): Left a small gap between tracks
(R): Iron spread in summer.
89. The amount of radiation emitted by a perfectly black body proportional to
90. Fruit stored in a cold chamber exhibit longer storage life because
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