A primary alcohol was reacted with pyridinium chlorochromate (PCC), which resulted in a product \(\mathrm{P}\). The product \(\mathrm{P}\) on treatment with ammonical silver nitrate solution produces.

Assertion A : ${\mathrm{SF}}_6$ is highly stable
Reason (R) : ${\mathrm{SF}}_6$ is a gas
The correct option among the following is

Identify the correct statements from the folluwing (A) At 298 K, the potential of hydrogen electrode placed in a solution of \(\mathrm{pH}=10\), is -0.59 V (B) The limiting molar conductivity of \(\mathrm{Ca}^{2+}\) and \(\mathrm{Cl}^{-}\)is 119 and \(76 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}\) respectively. The limiting molar conductivity of \(\mathrm{CaCl}_2\) is \(195 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-\frac{1}{2}}\) (C) The correct relationship between \(\mathrm{K}_{\mathrm{c}}\) and \(\mathrm{E}_{\text {cell }}^0\) is \(\mathrm{E}_{\mathrm{ccll}}^{-}=\frac{2.303 \mathrm{RT}}{\mathrm{nF}} \log \mathrm{~K}_{\mathrm{c}}\)

Optically active

was found to have lost its optical activity after standing in water containing a few drops of acids, mainly due to the formation of

When copper metal is treated with cold and dilute nitric acid, it forms

Round the number 234555359 to 3 significant figures.

What is the volume (in litres) of oxygen required at STP to completely convert \(1.5 \mathrm{~mol}\) of sulphur into sulphur dioxide?

What is the atomic number of the element with symbol Uus?

A radioactive nucleus can decay by two different processes. The half lives of the first and second decay processes are \(5 \times 10^3\) and \(10^5\) years respectively. Then, the effective half-life of the nucleus is

The products formed when diethyl ether is reacted with cold \(\mathrm{HI}\) are

A hydrophilic surface is characterised by the contact angle at the water solid interface. The value of contact angle should be

Match the following : \(\begin{array}{ll|ll} & \text{List-I} & & \text{List-II} \
& \text{(Type of drug)} & & \text{(Erample)} \
\hline \text{A.} & \text{Antacid} & \text{I.} & \text{Serotonin} \
\text{B.} & \text{Antihistamine} & \text{II.} & \text{Seldane} \
\text{C.} & \text{Tranquilizer} & \text{III.} & \text{Ranitidine} \
\text{D.} & \text{Antibiotic} & \text{IV.} & \text{Chloramphenicol}
\end{array}\)
The correct answer is

Potassium superoxide on hydrolysis gives