Everyday Science MCQs

In Kelvin scale of temperature, the boiling point of water is marked as

A. 212 K
B. 273 K
C. 280 K
D. 373 K

D. 373 K

In the Kelvin scale of temperature, the boiling point of water is marked as 373 K. The Kelvin scale is an absolute temperature scale and is used in many scientific and engineering applications. The Kelvin scale is based on the concept of absolute zero, which is the temperature at which all matter has zero thermal energy and is at its coldest possible state.

In Kelvin scale of temperature, the boiling point of water is marked as Read More »

The chemical formula of Chile Salt Petre is

A. CaOCl2
B. NaOH
C. NaNO3
D. CaO

C. NaNO3

The chemical formula of Chile saltpetre (also known as sodium nitrate) is NaNO3. Sodium nitrate is a white crystalline solid that is soluble in water and is used in a variety of applications, including as a fertilizer, food preservative, and oxidizing agent in the manufacture of explosives.

A. CaOCl2 is the chemical formula for calcium hypochlorite.

B. NaOH is the chemical formula for sodium hydroxide.

D. CaO is the chemical formula for calcium oxide.

The chemical formula of Chile Salt Petre is Read More »

The term ‘white coal’ is sometimes referred to which of the following?

A. Geothermal energy
B. Wind energy
C. Hydroelectricity
D. Biomass energy

C. Hydroelectricity

Hydroelectricity is sometimes referred to as “white coal” because it is a clean and renewable source of energy that can be used to generate electricity in a way that is similar to the way coal is used. Hydroelectric power plants use the energy of falling water to turn turbines that generate electricity, and they do not produce greenhouse gases or other pollutants, making them an environmentally friendly source of energy.

The term ‘white coal’ is sometimes referred to which of the following? Read More »

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