Explanation

• When salt is added to pure water, the boiling point of the solution increases.
• This is known as boiling-point elevation.
• The boiling point of a solution is higher than that of the pure solvent (water)
• Because the dissolved salt particles disrupt the formation of vapor bubbles,
• Requiring more energy to overcome the surface tension and escape the solution as vapor.

Explanation

Microscopy is the science or technique of using microscopes to view small objects.

Microscope is the instrument, while microscopy refers to the practice of using it.

Explanation

Hazrat Ismael (AS) is called Abu-ul-Arab (Father of the Arabs) because Arab tribes trace their lineage through him.

He settled in Makkah and married into the Jurhum tribe, giving rise to Arab ancestry.

Explanation

Paint is a basic tool used for drawing and graphic designing.

It allows users to create, edit, and color images easily.

Explanation

Quaid-e-Azam Muhammad Ali Jinnah, administered the oath of office to Liaquat Ali Khan on August 15, 1947.

Quaid-e-Azam making him the country's first Prime Minister.

Explanation

• On Earth, surface water covers 70% area.
• 70-71 percent of the Earth's surface is water-covered.
• The oceans hold about 96.5 percent of all Earth's water.
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• This includes oceans, rivers, lakes, glaciers, and groundwater.
  

Explanation

International Day of Peace (or World Peace Day), celebrated  on September 21st each year,

 dedicated to strengthening the ideal of peace between all nations and people.

International Day of Peace Established in 1981 by United Nations resolution

Theme 2024: Cultivating a Culture of Peace

Theme 2025: Act now for a peaceful World.

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Explanation

Guttation is the exudation of liquid water droplets from the edges of leaves through special pores called hydathodes.

It usually occurs at night or early morning when soil moisture is high and transpiration is low.

Explanation

A spectrometer is an instrument used to measure the properties of light over a specific portion of the electromagnetic spectrum, especially to analyze line spectra produced by atoms or molecules.

It helps identify elements or compounds by detecting their unique emission or absorption lines in the spectrum.

A spectrometer is an instrument used to measure the wavelength of light (or other electromagnetic radiation) by dispersing it into a spectrum.

It is commonly used to analyze the spectral lines of elements, which correspond to specific wavelengths.

Explanation

1 radian ≈ 57.3 degrees, based on the formula: 

1 radian = 180/𝜋 degrees.

It is a standard angular measurement in mathematics and physics.