Meson was discovered by
Yukawa
Austin
Moseley
Einstein
A.
Yukawa
Mesons are particles found in nucleus. They are responsible for stability of nucleus. They were discovered by Japanese scientist Yukawa.
If the heat of formation of CO2 is -393 kJ. The amount of heat evolved in the formation of 0.176 kg of CO2 is
-1357.9kJ
-1275.9kJ
-1572.0kJ
-1165.5kJ
Order of reactivity of C2H6, C2H4 and C2H2 is
C2H6 > C2H4 > C2H2
C2H2 > C2H6 > C2H4
C2H4 > C2H2 > C2H6
All are equally reactive.
Dehydrohalogenation of an alkyl halide is a/an
nucleophilic substitution reaction
elimination reaction
both nucleophilic substitution and elimination reaction
rearrangement
In Wurtz reaction alkyl halide react with
sodium in ether
sodium in dry ether
sodium only
alkyl halide in ether
The oxidation state shown by silicon when it combines with strongly electropositive metals is
-2
-4
+4
+2
With cold and dilute sodium hydroxide fluorine reacts to give
NaF and OF2
NaF + O3
O2 and O3
NaF + O2
Nitrating mixture is
fuming nitric acid
mixture of conc H2SO4 and conc HNO3
mixture of nitric acid and anhydrous zinc chloride
None of the above