\(\text{R-Br} \xrightarrow{\text{Mg, dry Ether}} \text{P} \xrightarrow{\text{EtOH}} \text{Q}\)
What is Q?

When phenol is treated with chloroform in the presence of \(NaOH\), the major product formed is ?

Identify the incorrect statement about the \(H _2- O _2\) fuel cell from the following:

Select the incorrect statement(s)
A. Surface active agents like soaps and synthetic detergents form micelles in water.
B. Soaps are emulsifying agents.
C. \(C _{17} H _{35}\) (hydrocarbon) and - COO (Carboxylate) part of stearate ion \(\left( C _{17} H _{35} COO ^{-}\right)\)both are hydrophobic.
D. Surfactants are basic in nature.
Choose the most appropriate answer from the options given given below:

Read the passage carefully and answer the questions based on the passage:
The number of reacting species (atoms, ions or molecules) taking part in an elementary reaction, which must collide simultaneously in order to bring about a chemical reaction is called molecularity of a reaction. In the rate equation Rate \(=k[\mathrm{~A}]^x[\mathrm{~B}]^y\)
\(x\) and \(y\) indicate how sensitive the rate is to the change in concentration of A and B, respectively. Sum of these exponents, i.e., \(x +y\) gives the overall order of a reaction where \(x\) and \(y\) represent the order with respect to the reactants A and B respectively. Hence, the sum of powers of the concentration of the reactants in the rate law expression is called the order of that chemical reaction. For a first order reaction, the concentration of the reactant varies as \([\mathrm{R}]=[\mathrm{R}]_0 e^{-k t}\)
Which of the following statements is not true for order of a reaction?

The carboxylic acid that does not undergo Hell-Volhard-Zelinsky reaction is:

The substance having the same value of van't Hoff factor as that of \(K_4[Fe(CN)_6]\) is :

Select the hormone which is not secreted by human placenta:

HIV attacks which one of the following cells?

If \(\frac{1}{x^2}-\frac{1}{x}\) > 0, then \(x\) lies in the interval

The relation \(R=\left\{(a, b): a \leq b^2\right\}\) on the set of real numbers is:

A battery of emf 10 V and internal resistance \( 3 \, \Omega \) is connected to an external resistor. If the current in the circuit is 0.5 A, then the voltage drop across the external resistor will be

The maximum value of \(f(x)=\frac{\log x}{x}\) for \(x\) in \([2, \infty]\) is