Class – X

Subject – Science Practical Skills (Delhi)

1. A Student take some zinc granules in a test tube and adds dilute hydrochloric acid to it. He would observe that the colour of the zinc granules changes to :
   (1) white
   (2) black
   (3) brown
   (4) Yellow

2. A specimen of a fish was given to students to identify the externally visible chordate feature in it. The students would look for:
   (1) Operculum
   (2) Notochord
   (3) Dorsal tubular Nerve cord
   (4) Post anal tail

Courtesy: cbse.nic.in