  Jet production cross-section measurements are presented. The measurements are
done with the data from Large Hadron Collider (LHC) proton-proton collisions,
collected with the Compact Muon Solenoid (CMS) detector. The inclusive jet
production measurements are carried out with data collected $\rm \sqrt{s} ~= ~7
~TeV$ and $\rm 8~TeV$ with total integrated luminosity ($\mathcal{L}_{int}$)
$\rm 5.0~ fb^{-1}$ and $\rm 10.71~ fb^{-1}$ respectively. The dijet production
measurements are carried out with the $\rm \sqrt{s}~ =~ 7 ~TeV$ dataset. Jets
are reconstructed with the anti-$k_T$ clustering algorithm with size parameter
$R=0.7$. The measured cross sections are corrected for detector effects and
compared to perturbative QCD predictions at NLO, corrected for NP factors,
using various sets of PDF. The inclusive jet cross-section ratio of the jets
reconstructed with the anti-$k_T$ (AK) algorithm and two radius parameter $\rm
R~=~0.5$ and $\rm R~=~0.7$ are also presented. The data used is $\rm \sqrt{s}~
=~ 7 ~TeV$ CMS data corresponding to $\rm \mathcal{L}_{int}~=~5.0 ~fb^{-1}$.
Significant discrepancies are found comparing the data to leading order
calculations and to fixed order calculations at NLO, corrected for NP effects,
whereas simulations with NLO matrix elements matched to the parton showers
describe the data quite well. A study of color coherence effects in pp
collisions has been performed with the data collected at $\rm \sqrt{s}~ =~
7~TeV$ and $\rm\mathcal{L}_{int}~=~ 36~pb^{-1}$. The measurement of the
azimuthal angular correlation between the second and third jets is compared to
the predictions of Monte Carlo models with different implementations of color
coherence effects.
