Sources of Energy — Science STD 10 — Question

Aqueous solution of copper sulphate reacts with aqueous ammonium hydroxide solution to give.

One of the following is a surgical method which prevents the sperms from reaching the ovum and pregnancy does not occur. This method is:

A saturated hydrocarbon has fifty hydrogen atom in its molecule. The number of carbon atoms in its molecule will be:

The procedure of cleaning the blood of a person by using a kidney machine is known as :

Where does the embryo develop in a human female?

Arrange the following elements in the order of their decreasing metallic character Na, Si, Cl, Mg, Al:

If an object is placed 21cm from a converging lens, the image formed is slightly smaller than the object. If the object is placed 19cm from the lens, the image formed is slightly larger than object. The approximate focal length of the lens is:

Right atrium receives blood from.

Which one of the following does not increase while moving down the group of the periodic table?