# Physical Properties of Matter One Liner Questions & Answers

 Questions Answers 1 A drop of water is spherical in shape. This is due to – Surface tension 2 Oil spreads on the water surface because – Surface tension of oil is less than water 3 Kerosene oil floats on water because – Its density is greater than the density of water. 4 Pressure inside a soap bubble is – More than atmospheric pressure 5 If two bubbles of soap of different diameters come in contact with a tube, then what will happen? The smaller bubble will become smaller and bigger will become bigger 6 A hydrogen-inflated polyethylene balloon is released from the surface of the earth. As the balloon rises to an altitude up in the atmosphere, it will – Increase in size 7 What happens when some charge is placed on a soap bubble? Its radius increases 8 Kerosene rising in the wick of the stove is due to – Surface tension 9 In a capillary tube a fluid rises more as compared to water, this is due to the – Surface tension of fluid is more than that of water 10 When an air bubble at the bottom of the lake rises to the top, it will – Increased in size 11 While traveling by plane, the ink of the pen starts to come out – Due to a decrease in air pressure 12 In automobiles hydraulic brakes work on – Pascal’s Law 13 A sudden fall in barometer reading indicates that the weather will be – Stormy weather 14 With the rise in temperature, the viscosity of liquid – Decreases 15 The highest viscosity among the following is – Honey 16 Fish can survive in a frozen lake because – Water near the bottom does not freeze 17 Increasing the amount of a substance does not change its – Density 18 The density of water will reach its maximum value at the temperature of – 4º C 19 The maximum density of water is at – 277 Kelvin 20 Why does an iron nail float on mercury while it sinks in water? Iron has greater density than water and less than mercury. 21 A needle sinks in water whereas a ship made of iron floats on it because – The relative density of the needle is greater than that of water displaced by it 22 While lifting a bucket of water from a well, we feel that the bucket – Becomes heavier above the surface of water 23 200 gm of water is filled in a weightless balloon. Its weight in water will be – Zero 24 The clouds float in the atmosphere because of their low – Density 25 While floating in a sea what part of an iceberg is above the surface of the sea? 1/9 26 An ice cube is floating in a glass of water. What happens to the water level when the ice melts? It – Remains the same 27 A body floats at 4°C water. If the temperature reaches 100°C then – The body will sink 28 Why it is easier to swim in the sea than in a river? The sea water is salty 29 When a ship enters the sea from a river, what happens? It rises a little