A single strand of ____ ribonucleotides forms four double stranded stem regions by pairing the bases.

TLS Online TPP Program

#Question id: 20251

#XL - P Chemistry

In the reaction CS2 (l) + 3O2 (g) → CO2 (g) + 2SO2 (g) ΔH = –265 kcal

The enthalpies of formation of CO2 and SO2 are both negative and are in the ratio 4 : 3. The enthalpy of formation of CS2 is + 26 kcal/mol. Calculate the enthalpy of formation of SO2.

TLS Online TPP Program

#Question id: 20252

#XL - P Chemistry

The bond dissociation energy of gaseous H₂, Cl₂ and HCl are 104, 58 and 103 kcal mol^{– 1} respectively. The enthalpy of formation for HCl gas will be

TLS Online TPP Program

#Question id: 20253

#XL - P Chemistry

AB, A2 and B2 are diatomic molecules. If the bond enthalpies of A2, AB & B2 are in the ratio 1 : 1 : 0.5 and enthalpy of formation of AB from A2 and B2 is – 100 kJ/mol^–1. What is the bond enthalpy of A2.

TLS Online TPP Program

#Question id: 20254

#XL - P Chemistry

Given the following data

Determine at what temperature the following reaction is spontaneous ?

FeO(s) + C (Graphite)→ Fe(s) + CO(g)

TLS Online TPP Program

#Question id: 20255

#XL - P Chemistry

One mole of a gas occupying 3 dm³ expands against constant external pressure of 1 atm to a volume of 13 dm³. The work done is –

TLS Online TPP Program

#Question id: 27173

#XL - T Zoology

The following statements are made with reference to membrane fusion reactions in vesicle transport catalyzed by transmembrane SNARE proteins.