Inorganic Chemistry — 15 Physics PYQs with Answers | UKPSC PYQ Hub

Question 1

Lignite is a type of:

Accepted Answer

Coal. Lignite is a type of coal formed from organic remains. It is also called 'brown coal'. Lignite has low carbon content and high moisture content. It is in the early stage of coal development and is mainly used for power generation.

Question 2

Common name of Sodium Carbonate is:

Accepted Answer

Washing Soda. The common name of sodium carbonate is soda ash or washing soda. Formula – Na CO 2 3 • Baking powder (NaHCO ) - Sodium hydrogen carbonate. • Caustic soda (NaOH) - Sodium hydroxide. • Bleaching soda {CaOCl }- Calcium hypochlorite

Question 3

The substance which is hardest in nature is

Accepted Answer

Diamond. Diamond is the hardest natural substance in nature. Diamond is found in mines inside the earth. It is used in making Jewellery.

Question 4

Which of the following is not a ferromagnetic material?

Accepted Answer

Copper. Copper is a material that does not fall in the category of ferromagnetic materials because it permeability is less than one. Permeability is a property of a material that tells the measure of the magnetic field established in it.

Question 5

Which one of the following statements is correct about Titanium?

Accepted Answer

It is a metal which is used in the production of defense materials. Titanium is a light and strong metal, which is also used to make dental implants, objects that can be submerged at great depths, which is as strong as steel but much lighter than that. Mostly it is used in the production of defense materials.

Question 6

A covalent molecule having a double bond between its atoms is:

Accepted Answer

Oxygen. The oxygen molecule (O ) has a double bond between two oxygen atoms. • O = O{O }

Question 7

Which of the following metals, can be cut by knife?

Accepted Answer

Sodium. Generally Alkali metals such as lithium, sodium and potassium are so soft that they can be cut with a knife. Among the given options, sodium can be cut by a knife. Rest of the metals a r e very hard and it is not possible to cut them by knife.

Question 8

Heavy water is a

Accepted Answer

Moderator. Heavy water also known as deuterium oxide (D O), It is used as a moderator in some reactors because it slows down neutrons effectively a nd also has a low probability of absorption of neutro n s.