class 12

Chemistry

General Organic Chemistry

Which of the following is an anionic detergent ?

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If a piece of metal is heated to temperature $θ$ and then allowed to cool in a room which is at temperature $θ_{0}$ the graph between the temperature T of the metal and time t will be closest to :

Distance between two parallel planes $2x+y+2z=8$ and $4x+2y+4z+5=0$ is

An unknown alcohol is treated with the ''Lucas reagent'' to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism:

If the equations $x_{2}+2x+3=0$and $ax_{2}+bx+c=0,a,b,c∈R$, have a common root, then $a:b:c$is

Let the population of rabbits surviving at a time t be governed by the differential equation $(dpdtt =21 p(t)−200.$If $p(0)=100$, then p(t) equals

Diameter of plano-convex lens is 6 cm and thickness at the centre is 3 mm. If speed of light in material of lens is $2×10_{8}m/s,$ the focal length of the lens is :

The area (in sq. units) of the region described by ${(x,y):y_{2}≤2x$and $y≥4x−1}$is :

The negation of $s∨(r∧s)$ is equivalent to :