Explanation

According to the World Health Organization (WHO), the industrial limit of sound in industries must be 75 dB (Decibels).

Explanation

The incorrect statement is: Metals are dull and soft.

Metals are typically:

• Solid at room temperature
• Have high melting and boiling points
• Good conductors of heat and electricity
• Shiny (although some metals may have a dull appearance due to oxidation or other surface treatments)
• Ductile (can be drawn into thin wires or sheets)
• Malleable (can be pounded into shape without breaking)

Explanation

• The correct answer is: Particles have large empty spaces between them.
• This statement is incorrect because particles in liquids have small spaces between them, not large empty spaces.

Explanation

The life cycle of a frog:

• Frogspawn (Eggs): Laid by the female frog in water.
• Tadpoles (Larvae): Hatch from eggs, aquatic, and feed on algae.
• Froglet (Young Frog): Undergo metamorphosis, develop limbs, and lose tail.
• Frog (Adult): Fully developed, breathing air, and reproducing.

Explanation

• In a normal man, the average heart beat is 72 times per minute.
• But it may vary from 70-80 beats per minute.

Explanation

• During breathing, the clean, moist, and warm air enters the windpipe called the Trachea.
• The trachea is also known as the windpipe.
• It is a tube that connects the throat (pharynx) to the lungs, allowing air to pass through during breathing.

Explanation

• The brain is the command center of the body, controlling everything from movement and sensation to thought and emotion.
• It processes information, sends signals to muscles and glands, and regulates various bodily functions, making it the central control system of the body.

Explanation

The 50 stars on the U.S. flag represent the 50 states of the United States of America.

The 13 stripes represent the 13 British colonies that declared independence from Great Britain.

These 13 colonies later became the first states in the Union.

Explanation

About men’s Cricket World Cup 2023

Edition: 13th

Format: One Day International (ODI)

Venue: India

Winner: Australia (sixth title)

Staring date: 5 October

Final date: 19 November

Runners-up: India

Participating teams: 10

Total Matches: 48

Note: This is the first time India hosting the tournament solely

Explanation

On Pakistan Day 23 March 2023, President Arif Alvi awarded the Nishan-i-Imtiaz to the sports legends Jahangir Khan and Jansher Khan. 

They are both squash champions who have greatly contributed to Pakistan’s sporting legacy.