Practicel based question

Q26. On observing a permanent slide under the microscope, a student found a structure without cell wall that had light and dark bands. What could be the slide of ? Draw its structure.

Q27. Student A puts Fe nails in H₂SO₄ solution, while the other student B puts H₂ pieces in H₂SO₄ solution. The observation that solution turns green from blue colour is observed by which student ? Also, write the chemical reaction 

Dear Student,

Please check the question one more time as H₂ is a gas so you cannot add pieces of H₂ in the H₂SO₄ which is the second part of your question while in the first part you have mentioned Fe + H₂SO₄ so here also H₂SO₄ is a colourless liquid so there is no blue solution present in the question.
Still, I am giving the reaction between Fe and H₂SO₄ as Fe is more reactive.

Fe + H₂SO₄  $\to$FeSO₄ + H₂

Also assuming CuSO₄ in the first part of reaction instead of H₂SO₄ as CuSO₄ is blue in colour.

Fe + CuSO₄ $\to$ FeSO₄ + Cu

Here CuSO₄ is blue in colour which will turn to the green colour of FeSO₄.

I hope it will help you.

Regards