Explanation

• The reaction rate depends on concentrations of A and B.
• Doubling [A] makes rate 4 times → order of A = 2.
• Doubling [B] makes rate double → order of B = 1.
• So total order = 2 + 1 = 3 (Third order reaction).

Last verified on 19-05-2026

Explanation

• PCC Full Form: Pyridinium Chlorochromate
• Type: Mild oxidizing agent
• Primary Alcohol → Aldehyde
• Secondary Alcohol → Ketone
• Usually used in organic solvents like dichloromethane (CH₂Cl₂).

Last verified on 19-05-2026

Explanation

• [Pt(NH₃)₂Cl₂] is a square planar coordination compound of platinum.
• It shows geometrical isomerism because the ligands can occupy different positions around the central metal atom.

The compound forms:

1. Cis-isomer
2. Trans-isomer

So, total geometrical isomers = 2.

Last verified on 19-05-2026

Explanation

• Energy Transition refers to the global shift toward cleaner and sustainable energy sources.
• It aims to reduce dependence on fossil fuels like coal, oil, and gas.
• Countries are increasingly using solar, wind, and hydro energy to protect the environment.
• This transition helps reduce pollution and climate change effects.

Last verified on 12-05-2026

Explanation

• Hepatitis A is primarily spread through the fecal-oral route, often via consumption of contaminated food or water.
• It can be prevented by maintaining good hygiene, ensuring safe drinking water, and vaccination.

Last verified on 31-03-2026

Explanation

 The evidence for chordate ancestry in echinoderms mainly relies on Deuterostome embryonic development

• Both echinoderms and chordates are deuterostomes.

• In deuterostomes, the blastopore forms the anus first.

• They show similar patterns of early embryonic development.

• This developmental similarity indicates a common evolutionary ancestry.

Explanation

Oceans absorb about 25-30% of anthropogenic CO₂ emissions, making them the largest natural carbon sink on Earth.

CO₂ dissolves in seawater and undergoes chemical reactions, forming carbonic acid, which affects ocean pH and marine ecosystems (ocean acidification).

Explanation

A solar eclipse can only take place during the phase of the new moon

when the moon passes directly between the sun and Earth and its shadows fall upon Earth's surface.

Explanation

The value of liquid gallon is defined as 231 cubic inches and equates to approximately 3.785 litres.

1 litres = 0.22 gallons = 1000 cm3.

One imperial gallon is equivalent to approximately 1.2 U.S. liquid gallons.

1 imperial gallon = 4.546 litres

Explanation

Silicon is a metalloid with properties ideal for controlling electrical current.

It's the most widely used material in semiconductor devices like transistors and chips.