Installing postgres10 on Ubuntu 16

HI

I am trying to install postgres 10 on Ubuntu 16. The steps I have followed

wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo
apt-key add -

sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt/
$(lsb_release -sc)-pgdg main" > /etc/apt/sources.list.d/PostgreSQL.list'

sudo apt-get update

sudo apt-get install postgresql-10

But after installation I am seeing libpq5 version that is installed is from
postgres 11.

dmanna(at)ubuntu:~$ sudo dpkg-query --status libpq5
Package: libpq5
Status: install ok installed
Priority: optional
Section: libs
Installed-Size: 742
Maintainer: Debian PostgreSQL Maintainers <
team+postgresql(at)tracker(dot)debian(dot)org>
Architecture: amd64
Multi-Arch: same
Source: postgresql-11
Version: 11.2-1.pgdg16.04+1

Is this expected? Will this cause any issue with postgres 10 ?