Question : When iron rusts, its weight

Option 1: decreases

Option 2: increases

Option 3: remains the same

Option 4: first increases and then decreases

Question : In a peridic table of elements on moving from left to right across a period ,the atomic radius

Option 1: Decreases

Option 2: Increases

Option 3: Remains un changed

Option 4: Does not follow a definite pattern

Question : At the boiling point of liquids, its

Option 1: temperature increases

Option 2: atmospheric pressure increases

Option 3: temperature remains constant

Option 4: vapour pressure decreases

Question : If the force applied on the object is in the direction of its motion, the speed of the object _____.

Option 1: increases

Option 2: stops

Option 3: decreases

Option 4: no effect

Question : When ice cubes are made, the entropy of water ?

Option 1: does not change

Option 2: decreases

Option 3: increases

Option 4: may either increase or decrease depending on the process used