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Consider the following:
I.    A decrease in pressure on cell exerted by the wall
II.   An increase in water potential of the surroundings
III.  The uptake of solutes by the cell
IV.  An increase in the tension on the surrounding solution
Which of the above would contribute to the uptake of water by the cell?
1. I, II, III
2. II, III, IV
3. I, II, IV
4. I, III, IV

The correct order in which the O-O bond
length increases in the following is
1. H₂O₂<O₂<O₃
2. O₃<H₂O₂<O₂
3. O₂<O₃<H₂O₂
4. O₂<H₂O₂<O₃

Sodium carbonate solution in water is alkaline due to
(1) hydrolysis of $N{a}^{+}$
(2) hydrolysis of ${\mathrm{CO}}_3^{2-}$
(3) hydrolysis of $N{a}^{+}$ and ${\mathrm{CO}}_3^{2-}$ions
(4) none of these
 

H₂O₂ restores the colour of old lead paintings by:
1. Converting PbO₂ to Pb
2. Oxidising PbS to PbSO₄
3. Converting PbCO₃ to Pb
4. Oxidizing PbSO₃ to PbSO₄

A body of mass m slides down an incline and reaches the bottom with a velocity v. If the same mass were in the form of a ring which rolls down this incline, the velocity of the ring at bottom would have been
(1) v
(2) $\sqrt{2} v$
(3) $\left(1/\sqrt{2}\right)v$
(4) $\left(\sqrt{2/5}\right)v$

A force F is applied on a body which moves with a velocity v in the direction of the force, then the power will be
1.  ${\mathrm{Fv}}^2$
2.  Fv
3.  $\mathrm{F}/{\mathrm{v}}^2$
4.  F/v
 

A particle starts from the origin at t=0 and moves in the x-y plane with constant acceleration 'a' in the y direction. Its equation of motion is $y=b{x}^2$. The x component of its velocity (at t=0) is:
(1) variable
(2) $\sqrt{\frac{2a}{b}}$
(3) $\frac{a}{2b}$
(4) $\sqrt{\frac{a}{2b}}$