The chemicals and the reaction conditions required for the preparation of ethane are

The correct order of electronegativity of carbon in various hybridization states:

The order of acidic strength of following acids is

What are \(\underline{A}, \underline{B}, \underline{C}\) in the following reactions?
(I) \(\left(\mathrm{CH}_3 \mathrm{CO}_2\right)_2 \mathrm{Ca} \stackrel{\Delta}{\longrightarrow} \underline{A}\)
(II) \(\mathrm{CH}_3 \mathrm{CO}_2 \mathrm{H} \underset{\operatorname{Red~P}}{\stackrel{\mathrm{HI}}{\longrightarrow}}\)
(III) \(2 \mathrm{CH}_3 \mathrm{CO}_2 \mathrm{H} \stackrel{\mathrm{P}_4 \mathrm{O}_{10}}{\longrightarrow} \underline{\mathrm{C}}\)
\(\underline{A} \quad \underline{B} \quad \underline{C}\)

For a first order reaction, the ratio between the time taken to complete \(\frac{3}{4}\) th of the reaction and time taken to complete half of the reaction is

What is the conjugate base of chloric acid?

Calorific value of producer gas is low because of

If \(\Delta=\left|\begin{array}{ccc}1 & \cos \theta & 1 \\ -\cos \theta & 1 & \cos \theta \\ -1 & -\cos \theta & 1\end{array}\right|\), then \(\Delta\) lies in the interval

The energy (in eV) possessed by a neon atom at \(77^{\circ} \mathrm{C}\) is (Blotzmann constant, \(\mathrm{K}_{\mathrm{B}}=1.38 \times 10^{-23} \mathrm{~J} \mathrm{~K}^{-1}\) )

When an external force with angular frequency \(\omega_d\) acts on a system of natural angular frequency \(\omega\), the system oscillates with angular frequency \(\omega_{\mathrm{d}}\). The condition for the amplitude of oscillations to be maximum is

One mole of 2-methylbuta-1, 3-diene on ozonolysis gives

Match of the following.
\(\begin{array}{ll}
\hline \text{ Column I } & \text{ Column II } \\
\hline \begin{array}{ll}
\text{A. Ratio of } \frac{\Delta Q}{\Delta U} \text{ in an isobaric} \\
\text{process}
\end{array} & 1. \frac{T_1}{\left(T_1-T_2\right)} \\
\hline \begin{array}{ll}
\text{B. Ratio of } \frac{\Delta Q}{\Delta W} \text{ in an isobaric} \\
\text{process}
\end{array} & 2. \frac{T_2}{\left(T_1-T_2\right)} \\
\hline \begin{array}{l}
\text{C. Coefficient of performance} \\
\text{of a refrigerator}
\end{array} & 3. \frac{\gamma}{\gamma-1} \\
\hline \begin{array}{l}
\text{D. Coefficient of performance} \\
\text{of a heat pump}
\end{array} & 4. \gamma \\
\hline
\end{array}\)
Codes
\(\begin{array}{llll}A & B & C & D\end{array}\)

If \(\sqrt{3} \cos \theta+\sin \theta>0\) then