Meson was discovered by

• Yukawa

• Austin

• Moseley

• Einstein

The following element forms a molecule with eight of its own atoms

• Si

• S

• Cl

• P

Coordination number of aluminium is

• 8

• 12

• 6

• 4

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

15.

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