Practice MCQ Questions and answers on General Science-GK

Atoms of an element differ from those of all other elements in number of neutrons and electronic configuration.

Nuclear fission in fissile fuels is the result of the nuclear excitation energy produced when a fissile nucleus captures a neutron.

Gamma radiation is the most penetrating of the three radiations. It can easily penetrate body tissue.

We can observe on the paper that the sunlight is split into a spectrum of colours like a rainbow, every colour in VIBGYOR pattern i.e., violet, indigo, blue, green, yellow, orange and red can be seen. The conclusion drawn here is that sunlight is nothing but a mixture of seven colours.

The important raw material(s) required in cement industry Limestone and Clay.

The correct answer is Option D: Foam type.

For petroleum fires, a foam type fire extinguisher is typically used. Foam extinguishers create a blanket of foam that covers the fuel and prevents the contact of oxygen with the fire, thereby extinguishing the flames. This is effective for liquid fuel fires, including those involving petroleum products.

Option A: Powder type is incorrect because powder extinguishers are more suitable for fires involving solids, not liquids.

Option B: Liquid type is not a standard classification of fire extinguishers. Fire extinguishers are categorized based on the type of fire they are designed to combat (e.g., Class A, B, C, etc.), rather than being called "liquid type."

Option C: Soda acid type is not typically used for petroleum fires. Soda acid extinguishers are more suitable for Class A fires involving ordinary combustible materials.

Nylon is commonly called a 'poly-amide'.

Epoxy resins are used in the manufacture of adhesives, plastics, paints, coatings, primers and sealers, flooring and other products and materials that are used in building and construction applications.

Detergents used for cleaning clothes and utensils contains sulphonates. They are sodium salt of long chain benzene sulphonic acid or the sodium salt of a long chain alkyl hydrogensulphate.

Arsenous oxide is used for removing air bubbles from glass during its manufacture.