MCQ
Decarboxylation is observed to be fastest in
- ✓
- B
- C
- D
✓
Answer
Correct option: A.
a
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
On heating water, bubbles being formed at the bottom of the vessel detach and rise. Take the bubbles to be spheres of radius $R$ and making a circular contact of radius $r$ with the bottom of the vessel. If $r < < R$, and the surface tension of water is $T$, value of $r$ just before bubbles detach is (density of water is $\rho_{w}$)
→A tank with a square base of area $1.0\; m ^{2}$ is divided by a vertical partition in the middle. The bottom of the partition has a small-hinged door of area $20\; cm ^{2} .$ The tank is filled with water in one compartment, and an acid (of relative density $1.7$) in the other, both to a height of $4.0 \;m$. compute the force (in $N$) necessary to keep the door
→Mercury has an angle of contact equal to $140^{\circ}$ with soda lime glass. A narrow tube of radius $1.00 \;mm$ made of this glass is dipped in a trough containing mercury. By what amount does the mercury dip down (in $mm$) in the tube relative to the liquid surface outside? Surface tension of mercury at the temperature of the experiment is $0.465\; N m ^{-1} .$ Density of mercury $=13.6 \times 10^{3} \;kg m ^{-3}$
→At a certain place the horizontal component of the earth’s magnetic field is $B_0$ and the angle of dip is $45^o$. The total intensity of the field at that place will be
→The area of cross-section of a railway track is $0.01\, {m}^{2}$. The temperature variation is $10^{\circ} {C}$. Coefficient of linear expansion of material of track is $10^{-5} /{ }^{\circ} {C}$. The energy stored per meter in the track is ...... ${J} / {m} .$
→(Young's modulus of material of track is $10^{11} \,{Nm}^{-2}$ ))
Two particles are performing simple harmonic motion in a straight line about the same equilibrium point. The amplitude and time period for both particles are same and equal to $A$ and $T,$ respectively. At time $t=0$ one particle has displacement $A$ while the other one has displacement $\frac {-A}{2}$ and they are moving towards each other. If they cross each other at time $t,$ then $t$ is
→A rectangular block is $10 \,cm \times 10 \,cm \times 15 \,cm$ in size is floating in water with $10 \,cm$ side vertical. If it floats with $15 \,cm$ side vertical, then the level of water will ..........
→The position of the centre of mass of a cube of uniform density will be at
Current in the circuit is wattless, if
In an experiment, a convex lens of focal length 10 cm in placed co-axially on an optical bench in front of a convex mirror at a distance 2.66 cm from it. It is found that object and its image coincide. If the object is placed at a distance of 25 cm from the lens, then the focal length of the convex mirror is