Formula of precipitate HNO3(aq) + Ba(OH)2(aq) --
(s)
ZnCl2(aq) + KOH(aq) -
(s)
CuSO4(aq) + H2S(ag) -
(s)
H3PO4(aq) + Ca(OH)2(aq) +
(s)
Na2CO3(aq) + NH4Cl(aq) --
s)

beta decay is the answer

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".

the answer is option a.