Which cell is rechargeable?

The product in the following reaction is

Question based on following passage:
Adsorption is the process of attracting and retaining the adsorbate molecules on the surface of adsorbent. It is of two types i.e. Physisrption and chemisorption. To increase the rate of reaction, the substance called 'catalyst' is added. Promotors enhance the activity of catalyst while poison decrease the catalyst activity. Solutions may be true solution, suspension and colloids. Colloids are heterogenous but quite stable. On the basis of nature of interaction, colloids may be Lyophilic or Lyophobic. On the basis of type of dispersed phase particles, there may be multimolecular colloids, macromlecular colloids and associated colloids. The congulation of colloids may be done by boiling, dialysis or by mixing oppositely charged sols.
Molybdenum used in Haber process, acts as a :

Identify the product \([\text{B}]\) in the following reaction.
\(\text{CH}_3\text{CH}_2-\text{C} \equiv \text{CH} + \text{HCl} \rightarrow \text{A} \xrightarrow{\text{HI}} [\text{B}]\)

Which isomerism is shown by the following pairs ?
\(CH_3CH_2CH_2OH\) and \(CH_3CH_2OCH_3\)

Molarity (M) is defined as number of moles of solute dissolved in:

Which of the following reagents convert an alcohol into an alkyl chloride?
(A) Conc. Hydrogen Chloride
(B) Phosphorus trichloride
(C) Phosphorus pentachloride
(D) Thionyl Chloride
Choose the correct answer from the options given below:

A \( 14.0 \, \mu\text{F} \) capacitor is connected to a 220 V, 50 Hz source. The value of peak current in the circuit is (Given: \( \pi = \frac{22}{7} \) and \( \sqrt{2} = 1.414 \)):

Match List-I with List-II

List-I	List-II
(A) The current lags behind the emf by \( \pi/4 \) in phase	(I) A.C. circuit containing only an inductor
(B) The e.m.f. lags behind the current by \( \pi/4 \) in phase	(II) A.C. circuit with resistance and inductances in series
(C) The current lags behind the e.m.f. in phase by \( \pi/2 \)	(III) A.C. circuit containing only as capacitor
(D) The e.m.f. lags behind the current in phase by \( \pi/2 \)	(IV) A.C. circuit with resistance and capacitor in series

Choose the correct answer from the options given below :

Mr. X invested Rs. 4, 00, 000 in shares for 5 years.
The value of this investment was Rs. \(4,50,000\) at the end of the second year, Rs. \(4,90,000\) at the end of the third year and on maturity, the final value stood at Rs. \(6,00,000\).
The compound annual growth rate (CAGR) of this investment is :
[Given that \((1.5)^{1 / 5}=1.084\) ]

Interval in which the function \(f\) given by \(f(x)=\tan x-4 x, x \in\left(0, \frac{\pi}{2}\right)\) is strictly decreasing is

The simplest form of \(\tan ^{-1}\left(\frac{x}{\sqrt{a^2-x^2}}\right)\) is, where \(-a < x < a\).

The value of \(\tan \left\{2 \tan ^{-1}\left(\frac{1}{5}\right)+\pi / 4\right\}\) is :