What is the hybridisation of carbon atoms in fullerene?

• sp³

• sp

• sp²

• dsp³

Identify the invalid equation

• $∆\mathrm{H} = {\mathrm{\Sigma H}}_{\mathrm{products}} - {\mathrm{\Sigma H}}_{\mathrm{reactants}}$

• $∆\mathrm{H} = ∆\mathrm{U} + \mathrm{p}∆\mathrm{V}$

• $∆\mathrm{H}{°}_{\left(\mathrm{reaction}\right)} = \mathrm{\Sigma H}{°}_{(\mathrm{products} \mathrm{bonds})} - \mathrm{\Sigma H}{°}_{(\mathrm{reactant} \mathrm{bonds})}$

• $∆\mathrm{H} = ∆\mathrm{U} + ∆\mathrm{nRT}$

13.

For which among the following equimolar aqueous solutions Van't Hoff factor has the lowest value?

• Aluminium chloride

• Potassium sulphate

• Ammonium chloride

• Urea

Which element among the following does not form diatomic molecules?

• Argon

• Oxygen

• Nitrogen

• Bromine

Which among the following compounds does not act as reducing agent?

• H₂O

• H₂S

• H₂Se

• H₂Te

What is the quantity of hydrogen gas liberated when 46 g sodium reacts with excess ethanol? (Given atomic mass of Na = 23)

• 2.4 × 10^-3 kg

• 2.0 × 10^-3 kg

• 4.0 × 10^-3 kg

• 2.4 × 10^-2 kg

Tert-butyl methyl ether on treatment with hydrogen iodide in cold gives

• tert-butyl iodide and methyl iodide

• tert-butyl alcohol and methyl alcohol

• tert-butyl alcohol and methyl iodide

• tert-butyl iodide and methyl alcohol

In assigning R-S configuration, which among the following groups has highest priority?

• -SO₃H

• -COOH

• -CHO

• -C₆H₅

What is the chief constituent of pyrex glass?

• B₂O₃

• SiO₂

• Al₂O₃

• Na₂O

Which of the following compounds has lowest boiling point?

• n-butyl alcohol

• lso-butyl alcohol

• Tert-butyl alcohol

• Sec-butyl alcohol