Where does the process of cleavage begin in humans?

Which of the following statements is true regarding the industrial production of hydrogen gas from water gas $(CO + H_2)$?

If for some reason our goblet cells are non-functional,this will adversely affect:

An electric motor operating on a $60\,V$ $dc$ supply draws a current of $10\,A$. If the efficiency of the motor is $50\%$,the resistance of its winding is....$\Omega$

Which of the following is a micronutrient for plants?

In a $p-n$ junction diode,the thickness of the depletion layer is $2 \times 10^{-6} ~m$ and the barrier potential is $0.3 ~V$. The intensity of the electric field at the junction is: