Explanation

Given ratio = Nitrogen : Sulphur : Phosphorus = 5 : 3 : 2  

Total parts = 5 + 3 + 2 = 10  

Total weight = 200 kg  

Value of 1 part = Total weight / Total parts  

= 200 / 10 = 20 kg  

Initial weight of Nitrogen = 5 x 20 = 100 kg  

Initial weight of Sulphur = 3 x 20 = 60 kg  

Initial weight of Phosphorus = 2 x 20 = 40 kg  

100 kg of Nitrogen is added.  

New weight of Nitrogen = 100 + 100 = 200 kg  

Verified & Updated

Explanation

• Neon is the primary gas used in decorative and advertising lights
• The color of the light depends on the gas in the tube.

Additional information

• Argon: Produces a blue or (mixed with mercury) green/purple light.
• Helium: Glows yellow or pink.
• Krypton: Emits a whitish-yellow light.
• Xenon: Creates a violet/lavender light.

Last updated by NA on 16-07-2026

Explanation

Let the original weight of the solution = x kg

Acid present in original solution = 92% of x = 0.92x kg

Water is added. Only water is added, so the amount of acid remains the same.

Final weight of solution = 40 kg  

Final concentration of acid = 84%  

Acid present in final solution = 84% of 40 = 0.84 x 40 = 33.6 kg

Since acid remains the same:  

0.92x = 33.6  

x = 33.6 / 0.92  

x = 36.52 kg (approx)

Verified & Updated

Explanation

• Enzymes are protein-based chemical compounds produced in the cells of living organisms.
• They act as biological catalysts, speeding up chemical reactions.
• Enzymes are essential for digestion, metabolism, and energy production.

Verified & Updated

Explanation

• C₄H₆O most likely belongs to the Aldehyde or Ketone class.
• The formula indicates two degrees of unsaturation, which can include a carbonyl group (C=O).
• Aldehydes and ketones commonly contain this functional group.

Verified & Updated

Explanation

Moles needed = 0.5 × 0.1 = 0.05 mol

Molar mass of CaCl₂ = 111 g/mol

Required mass = 0.05 × 111 = 5.55 g

Verified & Updated

Explanation

• Amino acids are the building blocks of proteins.
• Proteins are formed when amino acids join together by peptide bonds.
• Proteins are essential for growth, repair, and body functions.
• There are 20 standard amino acids used to make proteins.

Verified & Updated

Explanation

• Nitrogen (N₂): 78%

Additional information:

• Oxygen (O₂): 21%
• Argon (Ar): 0.93%
• Carbon dioxide (CO₂): ~0.04%
• Other gases: ~0.03%

Last verified on 16-05-2026

Explanation

• Alkynes → Triple bond (C≡C)
• Example of an alkyne: Ethyne (Acetylene, C₂H₂)

Additional information:

• Alkanes → Single bond (C–C)
• Alkenes → Double bond (C=C)

Verified & Updated

Explanation

• Chemical Formula: CH₃COOH (also written as C₂H₄O₂)
• IUPAC Name: Ethanoic Acid
• Type: Weak organic (carboxylic) acid
• Molar Mass: 60.05 g/mol
• Found in: Vinegar (about 4–8% acetic acid)

Last verified on 12-07-2026