1. 2 naoh + cl₂ → nacl + naclo + h₂o

the given reaction proceeds at:

a) 500°c
b) 200°c
c) -10°c
d) 50°c

2. divalency of heavier elements of groups 4 can be explained on the basis of :

a) low ionization
b) their large sizes
c) inert pair effect
d) low en values

3. the oxide in which cl has the highest oxidation number is:

a) clo₂
b) cl₂o₅
c) cl₂o₇
d) cl₂o₃

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.