Urinary tract infection. Urine discoloration - it might not be blood in the urine. Red urine - see also other causes of red urine or orange urine than blood in urine. Pink urine - small quantities of blood in urine may appear as pink urine. Kidney (renal) conditions Kidney infection.
Intramolecular force. An intramolecular force is any force that holds together the atoms making up a molecule or compound. They contain all types of chemical bonds. They are stronger than intermolecular forces, which are present between atoms or molecules that are not bonded. Types of intramolecular force.
Covalent bonds are the only intramolecular force listed. All of the other ones are intermolecular forces. Intramolecular forces only act between the atoms within the molecule while intermolecular forces are the forces that act in between the molecules. Intermolecular forces: dipole-dipole, London dispersion, ion-dipole, and hydrogen bonding. (Van der Waal forces I think refer to intermolecular forces in general or it could just refer to London dispersion forces. I can't completely remember) intramolecular forces: covalent bonds, ionic bonds, and metallic bonds.