Which of the following is a synthetic auxin?

Which one of the following frequencies of radiation (in $Hz$) has a wavelength of $600 \ nm$?

$A$ vessel contains $1 \, mole$ of $O_2$ gas (molar mass $32$) at a temperature $T$. The pressure of the gas is $P$. An identical vessel containing one mole of $He$ gas (molar mass $4$) at a temperature $2T$ has a pressure of:

Equivalent conductivity of $Cr_2(SO_4)_3$ is related to molar conductivity by the expression

Bird flu is caused by

At $25 \ ^\circ C,$ the solubility product of $Mg(OH)_2$ is $1.0 \times 10^{-11}.$ At which $pH$ will $Mg^{2+}$ ions start precipitating in the form of $Mg(OH)_2$ from a solution of $0.001 \ M \ Mg^{2+}$ ions?