Explanation

• The average normal body temperature is generally accepted as 98.6°F (37°C).
• A temperature over 100.4°F (38°C) means you have a fever.

Additional Information:

• Hypothermia is the term used for temperature less than 36.50°C.
• Mild Pyrexia is the term used for temperature (99-100°F).
• Moderate Pyrexia is the term used for temperature (100-103°F).
• Severe Pyrexia is the term used for temperature (103-105°F).

Explanation

• Hazrat Saleh invented Soap.
• He was a prophet of the nation Samood.
• He is buried in Lebonan.

Last verified on 23-04-2026

Explanation

• Haber process is used to manufacture ammonia from nitrogen and hydrogen.
• Nitrogen is obtained from air, but hydrogen is usually obtained from natural gas or water, not both from air.
• Ammonia is formed as a compound.
• The reaction involves gases under high pressure and temperature.
• Therefore, the correct statement is about physical state of reactants and product.

Last verified on 12-04-2026

Explanation

• Pressure can be defined as the force acting per unit area.
• The unit of pressure is N/m² (Newton per square meter).
• It is also called Pascal (Pa).
• In SI base units kg⋅m−1⋅s−2
• Derivations from other quantities: p = F / A
• Dimension unit: M L^−1 T^-2.

Additional information 

The SI unit of energy/work is the joule (J)

Last updated on 09-03-2026

Explanation

Oxidation is the chemical process of:

• Losing electrons
• Oxidation state increases
• Always paired with reduction (together form redox)
• Reducing agent gets oxidized (it gives up the electrons)

Additional information 

Reduction:

• Gain electrons
• Oxidation state lowers
• Always paired with oxidation (redox)
• Oxidizing agent gets reduced

Explanation

• The SI unit of energy is the Joule (J).
• It is the unit of energy, work, and heat.

Additional information:

• 1 Joule (J) = 1 Newton × 1 meter
• Calorie – 1 cal = 4.184 J
• Kilowatt-hour (kWh) – 1 kWh = 3.6 × 10⁶ J
• Electronvolt (eV) – 1 eV ≈ 1.602 × 10⁻¹⁹ J
• Erg (CGS unit) – 1 erg = 10⁻⁷ J

Last verified on 17-01-2026

Explanation

• Torque is a measure of the turning effect of a force and is calculated as the product of the force applied and the perpendicular distance from the axis of rotation to the point where the force is applied.
• The formula for the magnitude of torque (τ) is:
• τ = r × F × sin(θ)
• where: 
• r is the distance vector (lever arm).
• F is the force vector.
• θ is the angle between the force vector and the distance vector. 

Explanation

• The SI unit of force is the newton (N).
• 1 N = the force needed to accelerate 1 kg of mass by 1 m/s²
• Derived unit: N = kg·m/s²
• Named after Sir Isaac Newton
• Based on F = ma (Newton's second law)

The base units relevant to force are:

1. The metre, unit of length — symbol m
2. The kilogram, unit of mass — symbol kg
3. The second, unit of time — symbol s

Explanation

• Proton has a positive charge.
• Its charge is +1e.
• 1e = 1.602 x10^-19 C.
• Classification: Baryon
• Composition: 2 up quarks (u), 1 down quark (d)
• Statistics: Fermionic
• Family: Hadron
• Interactions: Gravity, electromagnetic, weak, strong
• Symbol p, p+, N+, 11H+
• Theorized: William Prout (1815)
• Discovered: observed as H+ by Eugen Goldstein (1886). Identified in other nuclei (and named) by Ernest Rutherford (1917–1920).

Explanation

• Amphoteric oxides can react with both acids and bases to form salts and water.
• Tin dioxide (SnO₂) is amphoteric, while CaO is basic and CO₂ is acidic.