Question 1

Random Movement of particles was discovered by&#10;A)Robert Brown&#10;B)E. Goldstein&#10;C)James Chadwick&#10;D)Wilhein Weins

Accepted Answer

Robert Brown discovered the random movement of particles, now known as Brownian motion, while observing pollen grains in water through a microscope.

Question 2

Which of the following non-metals occur in liquid form at room temperature?&#10;A)bromine&#10;B)carbon&#10;C)sulphur&#10;D)chlorine

Accepted Answer

Bromine is the only non-metal that is in liquid form at room temperature.

Question 3

Brass is an example of a ______&#10;A)homogenous compound&#10;B)homogenous mixture&#10;C)heterogeneous mixture&#10;D)heterogeneous compound

Accepted Answer

Brass is an alloy consisting mainly of copper and zinc, which is uniformly mixed, making it a homogenous mixture rather than a compound because it does not have a fixed ratio of components.

Question 4

Which of the following is not a noble gas?&#10;A)helium&#10;B)neon&#10;C)argon&#10;D)hydrogen

Accepted Answer

Hydrogen is not a noble gas; it is a diatomic, reactive gas at room temperature. Noble gases, which include helium, neon, and argon, are characterized by their lack of reactivity and are found in Group 18 of the periodic table.

Question 5

Which of the following acids is present in sour milk?&#10;A)glycolic acid&#10;B)lactic acid&#10;C)citrus acid&#10;D)tartaric acid

Accepted Answer

Lactic acid is present in sour milk, resulting from the fermentation of lactose by bacteria.

Question 6

Which of the following acids is called the king of the acids?&#10;A)acetic acid&#10;B)phosphoric acid&#10;C)oxalic acid&#10;D)sulphuric acid

Accepted Answer

Sulphuric acid is often referred to as the "king of the acids" because of its wide range of applications in the chemical industry, including in the manufacture of fertilizers, in oil refining, and as a cleaning agent.

Question 7

The sharp pain caused by the sting of an ant is due to&#10;A)malic acid&#10;B)nitric acid&#10;C)formic acid&#10;D)lactic acid

Accepted Answer

The sharp pain caused by the sting of an ant is primarily due to formic acid. Ants inject formic acid through their stinger, which is what causes the pain and irritation.

Question 8

Vitamin C is an organic acid known as&#10;A)ascorbic acid&#10;B)citrus acid&#10;C)glycolic acid&#10;D)acetic acid

Accepted Answer

Vitamin C is known as ascorbic acid, which is essential for the synthesis of collagen and certain neurotransmitters, and also acts as an antioxidant.

Question 9

Soaps are sodium salts of&#10;A)mineral acids&#10;B)fatty acids&#10;C)bases&#10;D)carbonic acid

Accepted Answer

Soaps are sodium (or potassium) salts of fatty acids. They are produced by the saponification reaction, which involves the hydrolysis of fats or oils (which are triglycerides of fatty acids) with a strong base, typically sodium hydroxide (NaOH) or potassium hydroxide (KOH). This process yields glycerol and the sodium salts of the fatty acids, which are the soaps.

Question 10

Which of the following is not a property of acids?&#10;A)all acids have a sour taste&#10;B)acids turn blue litmus red&#10;C)acids turn red litmus blue&#10;D)all acids form H+

Accepted Answer

Acids turn blue litmus paper red, not the other way around. Red litmus paper turning blue is a property of bases, not acids.

Question 11

Which of the following acid is used in fire extinguishers?&#10;A)hydrochloric acid&#10;B)sulphuric acid&#10;C)nitric acid&#10;D)oxalic acid

Accepted Answer

The answer of Which of the following acid is used...

Question 12

Which of the following acid is used by goldsmiths for cleaning gold and silver ornaments? A)HCL B)H₂SO₄ C)HNO₃ D)H₃PO₄

Accepted Answer

The answer of Which of the following acid is used...

Question 13

Which order of relative size amongst the following is incorrect?&#10;A)Li < Na < K&#10;B)C < Si < Al&#10;C)Mg > Al < Na&#10;D)F < Cl < Br

Accepted Answer

The answer of Which order of relative size amongst the...

Question 14

Which one of the following has the smallest size? A)Al B)Al+ C)Al⁺² D)Al⁺³

Accepted Answer

The answer of Which one of the following has the...

Question 15

Which of the following is an example of fossil fuel?&#10;A)coal gas&#10;B)coke&#10;C)natural gas&#10;D)producer gas

Accepted Answer

The answer of Which of the following is an example...

Question 16

When steam is passed over hot coke, it produces&#10;A)producer gas&#10;B)synthesis gas&#10;C)tear gas&#10;D)coal gas

Accepted Answer

The answer of When steam is passed over hot coke,...

Question 17

Producer gas is a mixture of&#10;A)carbon monoxide and nitrogen gas&#10;B)carbon monoxide and hydrogen gas&#10;C)carbon monoxide and water vapour&#10;D)carbon monoxide and nitrous oxide

Accepted Answer

The answer of Producer gas is a mixture of&#10;A)carbon monoxide...

Question 18

Water gas consists of&#10;A)water vapour and coal dust&#10;B)a mixture of carbon monoxide and hydrogen&#10;C)a mixture of carbon monoxide and the nitrogen&#10;D)water vapour and methane.

Accepted Answer

The answer of Water gas consists of&#10;A)water vapour and coal...

Question 19

The gas used in the welding and cutting of metals is&#10;A)ethane&#10;B)ethene&#10;C)ethyne&#10;D)propene

Accepted Answer

The answer of The gas used in the welding and...

Question 20

Coal with largest C content is&#10;A)anthracite&#10;B)peat&#10;C)lignite&#10;D)bituminous

Accepted Answer

The answer of Coal with largest C content is&#10;A)anthracite&#10;B)peat&#10;C)lignite&#10;D)bituminous...

Question 21

An allotropic form of carbon used for cutting and drilling is&#10;A)charcoal&#10;B)bone charcoal&#10;C)graphite&#10;D)diamond

Accepted Answer

The answer of An allotropic form of carbon used for...

Question 22

Cinnabar is an ore of&#10;A)Pb&#10;B)Zn&#10;C)Hg&#10;D)Cu

Accepted Answer

The answer of Cinnabar is an ore of&#10;A)Pb&#10;B)Zn&#10;C)Hg&#10;D)Cu...

Question 23

Which of them is not an ore of silver? A)Ag₂S B)AgNO₃ C)AgCl D)None of these

Accepted Answer

The answer of Which of them is not an ore...

Deck 5: Chemistry and Physics: Particles, Acids, Gases, and Minerals