To identify the correct unit for \( E_{\text{cell}} \), we must understand what \( E_{\text{cell}} \) represents. In electrochemistry, \( E_{\text{cell}} \) is known as the cell potential or electromotive force (emf) of an electrochemical cell. It represents the potential difference that drives electrons from the anode to the cathode in a cell.
The standard unit of electric potential or electromotive force is the volt (V).
Let's analyze the options provided and justify why the correct answer is V:
Thus, the unit of \( E_{\text{cell}} \) is V.
Two positively charged particles \(m_1\) and \(m_2\) have been accelerated across the same potential difference of 200 keV. Given mass of \(m_1 = 1 \,\text{amu}\) and \(m_2 = 4 \,\text{amu}\). The de Broglie wavelength of \(m_1\) will be \(x\) times that of \(m_2\). The value of \(x\) is _______ (nearest integer). 
Structures of four disaccharides are given below. Among the given disaccharides, the non-reducing sugar is: 
Rearrange the following parts to form a meaningful and grammatically correct sentence:
P. a healthy diet and regular exercise
Q. are important habits
R. that help maintain good physical and mental health
S. especially in today's busy world