The reagent used for the conversion of allyl alcohol to propenal is

Light of wavelength $\lambda$ is incident on a single slit of width $a$ and the distance between the slit and the screen is $D$. In the diffraction pattern,if the slit width is equal to the width of the central maximum,then $D$ is equal to:

Which of the following hydroxides is acidic?

$A$ force of $100 \ dynes$ acts on a mass of $5 \ g$ for $10 \ s$. The velocity produced is .......... $cm/s$.

One hundred identical coins,each with probability $p$ of showing heads,are tossed once. If $0 < p < 1$ and the probability of heads showing on $50$ coins is equal to that of heads showing on $51$ coins,then the value of $p$ is

If $\Delta U$ and $\Delta W$ represent the increase in internal energy and work done by the system respectively in a thermodynamic process,which of the following is true?