Explanation

Mercury is used as a thermometric fluid because it has several ideal properties:

1. High Boiling Point (B.P)

   • Mercury doesn't evaporate easily, which makes it suitable for measuring high temperatures.

2. Low Freezing Point (not high M.P)

   • Mercury has a low melting point (−38.83°C), which helps in measuring low temperatures, though this limits it in very cold environments.

3. Stable and Uniform Coefficient of Expansion

   • Mercury expands uniformly with temperature, which gives accurate and consistent readings.

4. Visibility and Non-wettability

   • Mercury is shiny and opaque, so it's easy to see in a glass tube.

   • It doesn't stick to glass, which keeps the readings clean and precise.

Explanation

Frogs have a three-chambered heart.

• It consists of two atria and one ventricle.
• The right atrium receives deoxygenated blood from the body organs.
• The left atrium receives oxygenated blood from the skin and lungs.
• Both the atria send the blood to the ventricle.
• Since there is only one ventricle there is the mixing of both oxygenated blood and deoxygenated blood

Sh18-8-2023

Explanation

The theory of relativity was given by Albert Einstein in the early 20th century.

. It encompasses both the Special Theory of Relativity (1905) and the General Theory of Relativity (1915),

Explanation

You had better take care of your health.

بہتر تھا کہ آپ اپنی صحت کا خیال رکھیں۔

The phrase "had better" is used to give strong advice or a warning.

It is followed by the base form of the verb.

Explanation

• According to the United States Energy Information Administration (EIA), Russia has the largest natural gas reserves in the world.
• With an estimated 1,688 trillion cubic feet (47.8 trillion cubic meters) as of 2020.

Explanation

Add 8+13+25+43+11 = 100

Now, Divide with the number of digits, that is 5,

100 / 5 = 20

So A. 20 is the Answer

Explanation

in 2014, Microsoft bought Nokia's mobile phone business, incorporating it as Microsoft Mobile.

Nokia belongs to Finland.

Nokia's headquarters are in Espoo, Finland

It was founded in 1865 as a pulp mill in Tampere, Finland. 

Founders

• Fredrik Idestam
• Leo Mechelin
• Eduard Polon

It has operations in about 130 countries

Explanation

2x + 9x = 11

Combine like terms:

11x = 11

Divide both sides by 11:

x = 1

So, the value of 'X' is 1.

Explanation

The WHO recommended travel restrictions to prevent the spread of wild poliovirus, which is endemic in:

Nigeria

Afghanistan

Pakistan.

Explanation

Originally valued at $46 billion, the value of CPEC projects was $62 billion as of 2020.

By 2022, Chinese investment in Pakistan had risen to $65 billion.

China refers to this project as the revival of the Silk Road.

CPEC is a collection of infrastructure projects that are under construction throughout Pakistan since 2013.