The type of reaction ethyne mainly undergoes is
addition
carboxylation
esterification
saponification
substitution
Correct answer is A
No explanation has been provided for this answer.
1
0.25
0.05
0.025
0.01
Correct answer is D
no of mole in 250cm3 of its solution is about molar concentration.
using n = cv
c = nv
where c = molar concentration, n = number of moles and v = volume in dm3
number of mole of NaHCO3 = mass of NaHCO3 / molar mass of NaHCO3 = 8.484 = 0.1moles
but v = 250cm3 = 250/1000 = 0.25dm3
therefore c = 0.25 x 0.1 = 0.025moldm3
In the reaction 2H2S(g) + SO2(g) → 2H2SO(I)+3S(s)SO2is acting as _agent
a bleaching
a dehydrating
an oxidizing
a precipitating
a reducing
Correct answer is C
No explanation has been provided for this answer.
0 to 2
0 to 5
4 to 2
4 to 5
4 to 10
Correct answer is B
No explanation has been provided for this answer.
Chlorine displaces bromine from aqueous potassium bromide because
bromine is a liquid at room temperature
bromine is weakly acidic.
bromine has a greater atomic radius than chlorine
chlorine is a stronger oxidising agent than bromine.
the density of chlorine is less than the density of bromine.
Correct answer is D
No explanation has been provided for this answer.