This is true statement. Reason : As s orbitals have a spherical shape, only sigma bonds are possible from bonds formed by s orbitals.
In general, single bonds between atoms are always sigma bonds. Double bonds are comprised of one sigma and one pi bond.
Triple bonds are comprised of one sigma bond and two pi bonds.
A triple bond consists of two pi bonds and one sigma bond.
A double bond contains one sigma and one pi bond. Single bonds are always sigma bonds.
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