Carbon and its Compounds — Science STD 10 — Question

A student obtained a sharp image of a burning candle, placed at the farther end of a laboratory table, on a screen using a concave mirror. For getting better value of focal length of the mirror, the subject teacher suggested him for focusing a well illuminated distant object. What should the student do?

Tidal energy is harnessed by :

The group of solar cells connected in a specific pattern to produce desired magnitude of electric current is called :

Van Mahotsava is meant for :

The figure given below is representing the dialysis machine for removing nitrogenous wastes in patient with a kidney failure.

Which substances out of the following in the dialysis fluid should be at a lower concentration than in the blood of patient?

Which of the following is the atomic number of an element that forms basic oxide?

All the voluntary actions of our body are controlled by :

In a flower, the parts that produce male and female gametes are respectively :

Which of the following is the correct path taken by urine in our body?