• zero
• 90
• >>>  90
• <<<  90

• more than 1
• exactly 1
• zero
• infinity
• #### 3.  With the rise in temperature, surface tension

• increases
• decreases
• remains the same
• becomes zero

• 2 cm
• 4 cm
• 1.5 cm
• 3 cm
• #### 5.  Surface tension is equalto

• force/area
• forcex are
• force/length
• None of these

• 40 °C
• 60 °C
• 80 °C
• 100 °C
• #### 7.  What is the excess pressure inside a soap bubble of radius r

• 4Tr\frac{4T}{r}r4T​
• 2Tr\frac{2T}{r}r2T​
• r4T\frac{r}{4T}4Tr​
• r2T\frac{r}{2T}2Tr​
• #### 8.  Work done in blowing a soap bubble of radius r is

• 4πr2T4\pi r^2T4πr2T
• 8πr2T8\pi r^2T8πr2T
• 8πr3T3\frac{8\pi r^3T}{3}38πr3T​
• 4πr3T3\frac{4\pi r^3T}{3}34πr3T​
• #### 9.  Rain drops fall with constant velocity due to

• buoyancy
• gravity
• viscosity
• surface tension

• increases
• decreases
• no change
• All of above
• #### 11.  In which situation is work not being done?

• a 26 Kg wagon being pulled
• a 30 Kg present being held above the floor
• a 60 Kg weight being lifted up off the ground
• a 13 Kg cat running across the floor
• #### 12.  Antiseptic used in the cuts and wounds of human flesh have

• low surface tension
• high surface tension
• low sticky
• high viscosity

• insect
• insurance
• intern
• taco
• #### 14.  Surface tension is the phenomenon happens in

• liquid
• solid
• gas
• None of these

• surfing
• surface
• Santa Claus
• San Diego
• #### 16.  According to the picture from left to right, which of the answers is correct?

• neurally buoyant, positively buoyant, negatively buoyant
• negatively buoyant, neutrally buoyant, positively buoyant
• positively buoyant, neutrally buoyant, negatively buoyant
• neutrally buoyant, negatively buoyant, positively buoyant
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