Like After Being a Past PN Cadet
Being a past PN cadet is an experience that shapes individuals in ways that extend far beyond the confines of military training. The discipline, leadership skills, and sense of duty developed during cadetship provide a solid foundation for a variety of career paths, both within and outside the Philippine Navy. As a past PN cadet, one becomes part of a proud tradition that values service, commitment, and excellence.
Many past PN cadets go on to play pivotal roles in the maritime industry, government, or private sectors, utilizing the unique skills honed during their training. Additionally, the strong network of alumni provides opportunities for mentorship, collaboration, and personal growth, ensuring that the legacy of the PN cadet experience lives on in those who graduate.
Lessons Learned as a Past PN Cadet: Key Skills for Future Success
Q. The soul of chemistry is its dealing with:
- a. Internal structural changes in matter
- b. Composition of matter
- c. Properties of matter
- d. Composition and properties of matter
(Correct answer: d)
Q. All of the following statements are incorrect for 20 mol of hydrogen peroxide except:
- a. it has 20 mol of hydrogen atoms
- b. it has 30 mol of oxygen atoms
- c. it has 80 mol of atoms
- d. 30 mol of hydrogen atoms
(Correct answer: c)
Q. If proton number of two atoms is same, then it can be concluded that:
- a. they are isotopes
- b. compounds of both with Clโ will be similar in reactivity towards other compounds
- c. both have same colors
- d. both have same melting points
(Correct answer: b)
Q. A chemist poured lemon juice on soil. The idea that he may have in his mind is that:
- a. there may be a possibility of a chemical reaction
- b. lemon juice is dangerous to health
- c. lemon juice is dangerous to health
- d. water should be preferred over lemon juice for drinking
(Correct answer: a)
Q. Dr. Khan has discovered two isotopes of an element with atomic number 119. The relative abundance of isotopes 119Uue300 and 119Uue305 is 70% and 30% respectively. The average atomic weight of Uue is:
- a. 301.5 a.m.u
- b. 302.5 a.m.u
- c. 303.5 a.m.u
- d. 304.5 a.m.u
(Correct answer: b)
Q. Which of the following is not related to a.m.u?
- a. gram
- b. kilogram
- c. microgram
- d. gram/lit
(Correct answer: d)
Q. The number of significant figures in 0.00200 is:
- a. two
- b. three
- c. five
- d. one
(Correct answer: b)
Q. All of the following statements are incorrect except:
- a. precision and accuracy should go side by side in a scientific work
- b. scientific work must be precise, accuracy is not essential
- c. scientific work must be accurate, precision is not essential
- d. calculations must be made before any experiment
(Correct answer: a)
Q. Empirical formula and formula unit of an ionic compound:
- a. are always similar
- b. are always different
- c. may be similar or different
- d. ionic compounds donโt have any empirical formula
(Correct answer: c)
Q. Copper (II) oxide is mixed with an organic compound during combustion analysis. The purpose is:
- a. to carry out complete combustion
- b. to reduce the economy of the process
- c. to reduce the time for completion of the reaction
- d. all of the above
(Correct answer: a)
The Role of a Past PN Cadet in Todayโs Maritime Industry
Q. Bismark brown is a dye. Its molar mass is 228.3 g/mol. When the dye was analyzed by a scientist, it was found that it contains 30.68% nitrogen. How many nitrogen atoms are there in each Bismark brown molecule?
- a. 6
- b. 5
- c. 4
- d. 3
(Correct answer: b)
Q. The mass of 2 moles of sodium hydroxide will be:
- a. 2 g
- b. 20 g
- c. 40 g
- d. 80 g
(Correct answer: d)
Q. โAโ compound always consists of the same elements combined in the same fixed ratioโ. The statement is:
- a. a hypothesis
- b. a fact
- c. a law
- d. an observation
(Correct answer: c)
Q. The compound with the highest boiling point among the following is:
- a. HF(I)
- b. HCl(I)
- c. HBr(I)
- d. HI(I)
(Correct answer: d)
Q. Islamic genius investigated that the amount of heat required to raise the temperature of 11 grams of water from 30ยฐC to 31ยฐC is:
- a. one calorie
- b. a little bit greater than one calorie
- c. a little bit less than one calorie
- d. never equal to one calorie
(Correct answer: c)
Q. An atom is:
- a. the smallest indivisible particle in an element
- b. the smallest particle of an element which can undergo a chemical reaction
- c. the building block of an element
- d. always smaller than a molecule
(Correct answer: b)
Q. 10 moles of HโO contains:
- a. 100 moles of bonds
- b. 100 moles of electrons
- c. 30 atoms
- d. 25 moles of hydrogen bonds
(Correct answer: b)
Q. The volume of one kilogram of water at 4ยฐC is equal to one litre. The temperature of water is kept at 4ยฐC because water:
- a. has no dissolved gases at this temperature
- b. has maximum density at this temperature
- c. polarity of the water molecule is least at this temperature
- d. dipole moment has maximum value at this temperature
(Correct answer: b)
Q. A compound contains two elements X and Y. The percentage of X is 20% (At. wt = 40) and that of Y is 80% (At. wt = 80). The empirical formula of the compound is:
- a. XYโ
- b. XโY
- c. XโY
- d. XY
(Correct answer: a)
Q. A piece of paper is burnt in air, and the gas produced is passed through distilled water. The pH of the water solution will be:
- a. 1
- b. 7
- c. 2.1
- d. 6.8
(Correct answer: d)
You may like more MCQ related to Past PN cadet below
How Past PN Cadet Contribute to the Philippine Navy’s Legacy
Here is the updated version with “Q” added before each question and options included:
Q. Which of the following is a substance?
- a. sea water
- b. brass
- c. tap water
- d. graphite
(Correct answer: d)
Q. The freezing point of a substance is the temperature at which a liquid substance is converted to solid. It is:
- a. always lower than its melting point
- b. usually a little lower than its melting point
- c. always higher than its melting point
- d. exactly the same as its melting point
(Correct answer: d)
Q. The number of covalent bonds in 10 mol of carbon tetrachloride is:
- a. 2.4 x 10ยฒโต
- b. 40
- c. 4 x 10ยฒโด
- d. 6.4 x 10ยฒยน
(Correct answer: a)
Q. A student subtracted 0.00055 from 10.2345678 and reported the result as 10.23401. But his friend told him that the result was wrong. What is the correct result?
- a. 10.234017
- b. 10.2340178
- c. 10.234
- d. 10.23
(Correct answer: d)
Q. The following statement contained in a studentโs laboratory report is a conclusion:
- a. a gas is liberated
- b. colour of the gas is greenish yellow
- c. oxide of the gas is strongly acidic
- d. the gas is chlorine
(Correct answer: d)
Q. If 10g each of uranium and hydrogen are converted into energy according to the equation E = mcยฒ, then:
- a. energy obtained from uranium will be much greater than that from hydrogen
- b. energy obtained from hydrogen will be a little bit less than that from uranium
- c. energy obtained from hydrogen and uranium will always be exactly equal
- d. diamond
(Correct answer: a)
Q. A student analyzed a sample of sea water and found that it contained 2.3g of NaCl, 0.005g of MgSOโ, 0.234g of CaClโ, and 60.12g of HโO. The total mass of the sample is:
- a. 62.659
- b. 62.65
- c. 62.70
- d. 65.7
(Correct answer: d)
Q. A 50.00 mL sample of a cough mixture prepared by a pharmacist was found to have a mass of 46.0g. What is the density (in g/mL) of this mixture, stated to the correct number of significant figures?
- a. 0.92
- b. 0.920
- c. 0.9200
- d. 1.087
(Correct answer: b)
Q. Ozone (Oโ) filters the cosmic rays of sunlight. How many oxygen atoms are there in 0.2 mole of ozone (Oโ, molar mass 48.0 g/mol)?
- a. 6.02 x 10ยฒยฒ
- b. 6.02 x 10ยฒยณ
- c. 3.61 x 10ยฒยณ
- d. 6 x 10ยฒยณ
(Correct answer: c)
Q. On heating, the hydrated salt CaSOโยทxHโO loses its water of crystallization. In an experiment, it was found that when 0.2 mol of the hydrated salt was heated, 0.10 mol of water was lost. What is the molecular formula of the hydrated compound?
- a. CaSOโ
- b. CaSOโยทยฝHโO
- c. CaSOโยทHโO
- d. CaSOโยท2HโO
(Correct answer: d)
Exploring the Alumni Network of Past PN Cadet: Connections and Opportunities
Q. Zirconium chloride reacts with magnesium to produce Zirconium. The process is called the Knoll process.
ZrClโ + 2Mg โ Zr + 2MgClโ
How many moles of Zr would be produced if 0.2 mol of Mg metal is used in the reaction?
- a. 0.1
- b. 0.01
- c. 0.20
- d. 0.05
(Correct answer: a)
Q. Tobacco contains a poisonous alkaloid called Nicotine. The molecular formula of nicotine is CโโHโโNโ (molar mass = 162.23g). The mass percentage of nitrogen in nicotine is:
- a. 4.32%
- b. 8.23%
- c. 12.4%
- d. 17.3%
(Correct answer: d)
Q. A sample of an ionic compound contains 2.82 g Na, 4.35 g Cl, and 7.83 g O. The empirical formula of this compound is:
- a. NaClOโ
- b. NaClOโ
- c. NaClO
- d. NaClOโ
(Correct answer: d)
CHAPTER 2
Q. Professor Qawwi told his students that air is a mixture because: suddenly a student raised his hand and said:
- a. it is colourless
- b. oxygen can be removed from it
- c. its composition is different at different altitudes
- d. it has different properties from its constituents
(Correct answer: c)
Q. Imagine Dr. Khan is sitting in a room. The room is closed from all sides, no entry, no exit of any gas. If the room expands suddenly, then:
- a. he will be frightened
- b. his blood pressure will decrease
- c. he will feel cool
- d. he will feel warmth
(Correct answer: c)
Q. Which of the following elements will have the strongest Van der Waals force of attraction between its molecules?
- a. hydrogen
- b. oxygen
- c. chlorine
- d. nitrogen
(Correct answer: c)
Q. The beaker shown in the figure contains a slurry of ice and water. The three thermometers Fahrenheit, Kelvin, and Centigrade are placed in it. The thermometers are represented by A, B, and C, respectively. The lowest reading will be on thermometer:
- a. A
- b. B
- c. C
- d. Both A and C
(Correct answer: c)
Q. Which thermometer will have its reading 273 degrees greater than that of thermometer C?
- a. A
- b. B
- c. C has greater reading than all other thermometers
- d. B has 273 degrees greater reading than A
(Correct answer: b)
Q. The temperature recorded by the Kelvin scale is:
- a. 0K
- b. 273K
- c. 373K
- d. The absolute scale is unable to record this temperature
(Correct answer: b)
Q. If three birds called Oโ, Clโ, and Hโ were flying in the garden of Islamia College Peshawar, then:
I. Fastest birds are Oโ and Clโ
II. Slowest bird is Clโ
III. Bird called Oโ is in the middle.
- a. I only
- b. II and III only
- c. I and III only
- d. III only
(Correct answer: b)
Challenges and Triumphs: The Journey of a Past PN cadet After Graduation
Q. One liter of an unknown gas weighs 1.25 grams at S.T.P. One possible formula for the gas is:
- a. COโ
- b. CO
- c. Oโ
- d. SOโ
(Correct answer: b)
Q. If pressure on a gas is increased from 2 atm to 4 atm, then its volume will decrease from:
- a. 6L to 4L
- b. 8L to 2L
- c. 3L to 1L
- d. 4L to 2L
(Correct answer: d)
Q. An unknown gas has a density of 2.45 g/L at 1.5 atmospheric pressure and 25ยฐC. The gas is:
- a. Kr
- b. Clโ
- c. SOโ
- d. Ar
(Correct answer: d)
Q. This is a known fact that the molar volumes of different gases at S.T.P are:
- a. little bit greater than the molar volumes of liquids
- b. little bit less than the molar volumes of solids
- c. about the same as the molar volumes of liquids
- d. much larger than the molar volumes of liquids and solids
(Correct answer: d)
Q. The behavior of a gas is non-ideal at:
- a. low temperature and low pressure
- b. high temperature and high pressure
- c. high temperature and low pressure
- d. low temperature and high pressure
(Correct answer: d)
Q. Ammonium Perchlorate is used as solid fuel in rockets. During the process, it decomposes according to the reaction given below:
4NHโClOโ(g) โ 2Clโ(g) + 8HโO(g) + 2NโO(g) + 3Oโ(g)
The total volume of all the gases produced at S.T.P by the decomposition of 8 moles of Ammonium Perchlorate will be:**
- a. 30 L
- b. 672 L
- c. 179.0 L
- d. 60 L
(Correct answer: b)
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