**5. Conclusions**

Magnetohydrodynamic flow of viscoelastic nanofluids bound by a linear stretchable surface with heterogeneous–homogeneous reactions are analyzed. Both concentration *φ* (*ζ*) and temperature *θ* (*ζ*) are enhanced via higher *M*. Larger Brownian motion *Nb* displays opposite trend for concentration *φ* (*ζ*) and temperature *θ* (*ζ*). Larger thermophoresis number *Nt* produces higher concentration *φ* (*ζ*) and temperature *θ* (*ζ*). Temperature *θ* (*ζ*) is reduced when Prandtl number enhances. Prandtl number is considered to control the rate of heat transfer in engineering and industrial processes. The suitable value of Prandtl number is very essential to control the rate of heat transfer in engineering and industrial processes. Larger homogeneous-reaction *K* depicts a reduction in concentration rate *r* (*ζ*). Larger heterogenous-reaction *Ks* and Schmidt number *Scb* lead to higher concentration rate *r* (*ζ*). Skin friction is enhanced for larger magnetic parameter *M*. Reverse trend of local Sherwood number is seen for *Nt* and *Nb*. Local Nusselt number is decreased for thermophoresis *Nt* and Brownian motion *Nb* parameters. Furthermore, the present analysis is reduced to Newtonian fluid flow case when *k*∗ <sup>1</sup> = 0.

**Funding:** This research was funded by the Deanship of Scientific Research, King Khalid University, Abha, Saudi Arabia under grant number (R.G.P.2./26/40).

**Acknowledgments:** The author extends his appreciation to the Deanship of Scientific Research at King Khalid University for funding this work through Research Groups Program under grant number (R.G.P.2./26/40).

**Conflicts of Interest:** The author declares no conflict of interest.
