Explanation

Explanation

light blue litmus paper turning red under acidic conditions 

Red litmus paper turns blue under basic or alkaline conditions.

Purple litmus paper is neutral.

At pH levels of 0.0 to 4.5, the solution turns a red color;

At pH levels of 8.3 to 14.0, it turns a blue color.

Explanation

Acetic acid (CH3COOH), also called ethanoic acid, the most important of the carboxylic acids. 

Explanation

Current Chief Ministers of Pakistan:

Balochistan    Abdul Qudoos Bizanjo

KPK     Mahmood Khan

Punjab Pervez Elahi

Sindh Syed Murad Ali Shah

Gilgit-Baltistan       Khalid Khurshid

Explanation

Black holes are some of the strangest and most fascinating objects in outer space.

They're extremely dense, with such strong gravitational attraction that even light cannot escape their grasp if it comes near enough.

Explanation

A vertebrate is an animal with a spinal cord surrounded by cartilage or bone.

  Vertebrates include birds, fish, amphibians, reptiles, and mammals.

Explanation

When magnets are used in magnetic therapy, the poles are often referred to as being positive or negative.

Explanation

Average rainfall is the amount of precipitation that we expect per year.

Explanation

Earth is the fifth-largest planet in the solar system. Its diameter is about 8,000 miles. And Earth is the third-closest planet to the sun

Explanation

The ozone layer is a thin part of the Earth's atmosphere that absorbs almost all of the sun's harmful ultraviolet light. "Ozone holes" are popular names for areas of damage to the ozone layer.