@Gowri Shankar The content-type specified for the blob. The default content type is 'application/octet-stream'.
There is a similar thread discussion in the Q&A Forum, please refer to the suggestion and let me know if you are still finding any issue.
Also, their video on channel 9 :How-to-change-the-content-type-of-Microsoft-Azure-blob-storage it's a bit older version, but it provides complete information and the option to change the content type.
Hope this helps!
Kindly let us know if the above helps or you need further assistance on this issue.
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