The oxidation state of sulphur on H2SO4 acid is
-4
+6
4
-8
Correct answer is B
In SO4. The state of oxygen oxidation number is -2. Options A,C,D do not belong to the oxidation state in SO4
S block elements of the periodic table one made up of
groups 1, 2, 3
groups 1, and 2
group 3
group 3 to 7
Correct answer is B
S block elements only are made up of group 1 and 2 options A,C,D takes place of the other blocks in the periodic table p,d,f etc.
In the electrolysis of CuSo4(g) using platinum electrode the reaction at the anode is
4H+ 4e - 2H2
4OH= 4e- + 2H2O + O2
2OH - 2e- = 2OH
2OH- + 2OH = 2H2O + O2
Correct answer is B
40H − 4e → 2H2O + O2is the reaction of sun at the anode in the electrolysis of CuSO4 (g) using platinum particles. Option A,C,D are not formed as a result of the equation
The principal constituent of natural gas is
methane
ethane
propane
Butane
Correct answer is A
Methane CH4.A. is the principal and commercial constituent natural gas. Option B,C,D are also constituent of natural gas but they are not commercial and of economic importance
20
25
60
75
Correct answer is B
Let the relative abundance of the energy with mass 37 be
Total relative abundance of the isotope of mass 359100-k)
Total mass of isotope of mass 37-37x, while that of 35-359(100x)
-37x + 3500 − 35 − 35.5
-37x + 3500 − 35n − 35.5
Mean mass of chlorine atom − (2n + 3500)/ ÷ 100
= 35.5
2x + 3500 − 3550yx = 50/2