Explanation

Lithium is the lightest metal.

Density of 0.534 g/cm³.

It is an alkali metal,

The third element on the periodic table,

It is soft enough to be cut with a knife.

Uses: Due to its low density and high reactivity, it's used in aircraft and, famously, in the production of batteries for electric vehicles and consumer electronics. 

Explanation

Allotrope of oxygen:

• Ozone is a molecule made of three oxygen atoms (O₃), unlike the common oxygen we breathe, which has two atoms (O₂). 

Formation:

• In the upper atmosphere (the stratosphere), solar UV radiation strikes oxygen molecules (O₂), splitting them into single oxygen atoms (O).
• These free oxygen atoms then combine with other O₂ molecules to form ozone (O₃). 

Absorption of UV radiation:

• The ozone layer absorbs ultraviolet energy from the sun. When ozone absorbs UV radiation, it splits into an ordinary oxygen molecule and a free oxygen atom. 

Conversion to heat:

• This process, known as the "ozone-oxygen cycle," converts the harmful UV radiation into heat. 

Protection from harm:

• By absorbing this radiation, the ozone layer prevents excessive amounts of UV-B light from reaching Earth's surface,
• Where it would be damaging to human health (causing skin cancer, cataracts) and harmful to plants and aquatic ecosystems. 

Explanation

• It takes Mercury approximately 88 Earth days (specifically 87.97 days) to complete one orbit around the Sun
• This means that Mercury's year is equal to 88 Earth days
• Distance: Approx. 58 million km from the Sun
• But its rotation takes nearly 59 days. 
• Speed: ~47 km/s

Last updated question 2 May 2026 by NS

Explanation

Explanation

5 ×  5 = 25

25 ×  5 = 125

125 ×  5 = 625

625 ×  5 = 3125

3125 ×  5 = 15625

Explanation

Hydrogen is the most abundant element in the universe.

it is about 75 percent of its normal matter and was created in the Big Bang.

Additional information:

Oxygen is the most abundant element in the earth`s crust.

Calcium is the most abundant mineral in the human body.

Explanation

A chromosome is made up of proteins and DNA organized into genes.

Human somatic cells have 46 chromosomes (23 pairs).

These include 22 pairs of autosomes and 1 pair of sex chromosomes.

Explanation

Gomal Zam Dam is a gravity dam in South Waziristan Tribal District of Khyber Pakhtunkhwa.

The dam impounds the Gomal River.

Gomal Zam Dam was inaugurated in 2013.

Explanation

Sir Agha Khan led the Simla Deputation

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Simla Deputation organized by the Indian Muslim leaders met the Governor-General and Viceroy Lord Minto in Simla on 1 October 1906. 

The delegation of Simla deputation met Lord Minto on 1st October 1906

Explanation

• The full form of URL is Uniform Resource Locator.
• It is commonly known as a web address.
•  It tells your web browser how and where to find a specific resource on the internet, like a web page, image, or file

URL has three parts:

• Protocol such as http:// or https://.
•  Domain name such as example.com.
• Path such as /about.html
  

Last updated by NA on 09-09-2026