Questions

An ionic bond is a chemical bond between two atoms in which one atom seems to donate its electron to another atom.

Here in the given compounds, the compound that contains ionic bond is CaO, Calcium oxide.

The National Association for the Advancement of Colored People (NAACP) is a civil rights organization in the United States, formed in 1909. 

 Du Bois, Moorfield Storey and Mary White Ovington and some more in the group helped to form NAACP.

The design plans for the U-shaped skyscraper ‘The Big Bend’ in New York, hailed as the world’s longest building, have been revealed. The 4,000-foot long building will feature an elevator system that can travel in curves, horizontally and in loops.

Teens drinking are at risk of date rape, becoming an alcoholic, HIV and other STDs.

Lime mortar is generally made with Hydraulic lime.

Electronegativity, is a chemical property that describes the tendency of an atom to attract a shared pair of electrons (or electron density) towards itself.

Skimming is the removal of any material or particles that are floating on the surface. Hence, Removal of oil and grease from sewage - waste water is called as skimming.