Questions

Valentina Tereshkova was the first woman to walk on the moon.

In 1985 the physicist Wilhelm Rontgen discovered X-rays, the "X" signifying their unknown origin.He later found that the rays could pass through flesh and by using photographic plates could make images of bones inside the body. 

Silver chloride is a chemical compound with the chemical formula AgCl is also called as Horn Silver. It is also called as cerargyrite. It is a gray, very heavy halide mineral and an ore of silver.

In 1950 India's first Prime Minister Shri JawaharlalNehru was awarded with India's highest civilian honour BharatRatna.

Radioactive decay is likely to occur when the nuclei of an atom doesn't have enough binding energy to hold the nucleus together due to excess of rotons or nutrons in it.

Teressa Island is located in Andaman & Nicobar of India.

A rift valley is formed either due to upheaval of blocks on either sides of a fracture or due to subsidence of block between them.