Day 1 (L)

Model commonly used for enzyme kinetics and is identical to the Langmuir adsorption isotherm.

Which of the following elements is the most non-metallic?

The volume of an ideal gas is zero at _________.

If an inert or unreactive component is present in a reactant, this stream is added to rid the process of the undesired material.

It is defined as the mg of KOH necessary to neutralize the acid liberated by one gram of fat or oil.

How many monochlorinated products are expected from isobutane?

Hydrogen in the fuel that uses oxygen from air for its combustion is the

The KClO3 in a 127.9-mg sample of an explosive was determined by the reaction with 50.00 mL of 0.08930 M FeSO4 resulting to its reduction to Cl-1. When the reaction was complete, it was then treated with 10.735 mL of 0.02326 M KMnO4. Calculate the % KClO3 (122.55 g/mol) in the sample.

What would happen if the kinetic energy of the reactants was not enough to provide the needed activation energy?

The relative abundance of two naturally occurring isotopes of boron of atomic weights 11.009 and 10.01 is 80.20% and 19.80% respectively. Calculate the relative average atomic weight of boron.

Which one of the following is classified as a covalent crystal?

In a face-centered cubic lattice, each lattice, each lattice point located in a face of the unit cell is shared equally with ________ other unit cell.

One of the methods of preparing alkenes is by dehydration of alcohols with H₂SO₄. When the alcohol 2, 3-Dimethyl -1- butanol is dehydrated the alkene formed is

In phototrophic cells, the __________ is the organelle serving as the major cell power house.

In the hexagonal close-packed structure, each atom has a coordination number of

The presence of ozone (O₃) in the upper atmosphere is important because

The property of liquid that measures its resistance to flow is called

Line spectra are emitted by ________.

For which order reaction is the half-life proportional to 1/k where k is the rate constant.

The pH of tomato juice is about 4.5.  Calculate the concentration of hydrogen ions.

Consider the reaction     3 A  +  B  + C → D  +  E    where the rate equation is defined by r_A = k[A]²[B][C]. An experiment is carried out where [B]₀ = [C]₀ = 1.00 M and [A]₀ = 1.00 x 10^-4 M. After 3.00 minutes, [A] = 3.26 x 10^-5 M. The value of k is

Which of the following compounds is incorrectly named?

The powerhouse of the cell.

It is a variety of soot; used as a filler in the manufacture of rubber.

Air pollutants which are considered to have the longest residence time in the atmosphere.

A solution of a certain organic halide in benzene has a mole fraction of halide of 0.0821.  Express its concentration in terms of molality.

Ozonolysis of cyclohexene produces

Recording spectrophotometers sometimes operate with feedback loops that vary the power of the reference beam until it matches the power of the beam through the sample. This mode of operation

The amount of chlorine available in water after disinfection is called

If the BOD3 of a waste is 75 ppm (k = 0.150/day), what is the ultimate BOD?

Conductance measurements at infinite dilution will be valid for the determination of the solubility of difficulty soluble salts at saturation point because

Which of the following is not an hexose?

Vinylbenzene is also known as

The K_w of water at 25°C is _______ .

Microorganisms that use carbon dioxide as their carbon source

One of these statements is not correct for ideal gases

Addition of Grignard Reagent to ketones results in the formation of __________ alcohol.

The process in petroleum refining that increases the yield of the most useful fractions is

All of the following processes will produce a ketone EXCEPT

Which of the following is a protein?

Part of the nutrient cycles in which chemical nutrients reside in the soil, water, or air.

A sugar in which the cyclic acetal or hemiacetal ring is six membered.

Chemicals which are tested by the manufacturer showing the actual percentages of impurities and labeled on the containers are called

The oxidation state of oxygen is usually -2, except in peroxides, it is -1. Which of the following compounds is peroxide?

An increase in the temperature of the reactants causes an increase in the rate of reaction. The best explanation is: As the temperature increases,

A sanitary landfill has an area of 21 hectares and an average depth of 10m. If 850 m³ of solid waste are dumped daily. What would be the expected life of the landfill in years?  Assume that the solid wastes are compacted to twice their delivered density.

The method of standard addition compensates for matrix effects provided

Chopping the source beam in conjunction with the use of a tuned AC amplifier in an atomic absorption spectrophotometer accomplishes the following

Which of the following is not a correct element-precipitating agent pair?

For a face-centered cubic unit cell, each corner contributes __________ lattice points to the unit cell.

What is the freezing point of 20% wt benzene solution in water? (K_B = 2.57, K_F = 5.12)

Which of the following sets of atoms exhibit decreasing electronegativity?

Determine which of the following occurrences tells us what happens when Le Chatelier’s principle is applied whether these are TRUE or FALSE.

i. The addition of a component causes the equilibrium to shift to the opposite side.

ii. The removal of the component causes the equilibrium to shift to the side from which the component is removed.

iii. Increasing the temperature drives an exothermic equilibrium to the side of the reactant while an endothermic equilibrium to the side of the products.

iv. The addition of a catalyst has no effect on the position of the equilibrium.

Which of the following pairs are isotonic?

Which of the following sets of quantum numbers is correct?

Compute for the ThOD of 200 mg/L of glucose.

A mixture of the 8-hydroxyquinoline complexes of Al and Mg weighed 1.084 3 g. When ignited in a furnace open to the air, the mixture decomposed, leaving a residue of Al₂O₃ and MgO weighing 0.1344g. Find the weight percent of Al(C₉H₆NO)₃ in the original mixture.

Determine the electrochemical cell potential of the following cell and determine if the reaction is spontaneous or not: Ag_(s) | Ag⁺ (0.075 M) || Hg²⁺ (0.85 M) | Hg_(l), E° = 0.054

Which functional group/s do not react through electrophilic addition?

Reaction of acetone with methyl magnesium bromide, followed by protonation produces a:

Which among the following aromatic compounds is more reactive than benzene towards Aromatic Substitution reactions?

Which of the following administrative order issued by the DENR includes “navigable waters” as one of its water classifications?

Esterification can be achieved by reacting the following pairs of reagents:

A treatment facility in UP Los Baños discharges 13,000 m³/day of treated wastewater (BOD₅ = 11mg/L; k =0.12/day; DO = 1.0 mg/L) into Molawin Creek (BOD_u = 5 mg/L, DO = 4.3 mg/L) with a flow rate of 0.30 m³/s. What is the dissolved oxygen and initial ultimate BOD after mixing (mg/L)?

Laguna Lake is 3500 m long and 2800 m wide with an average depth is 20 m. The lake is fed by a pollution-free stream with an average flow rate of 6.9 m³/s. The herbicide Sivad is detected at a concentration of 33.1 μg/L. Sivad degrades biologically with a rate constant of 0.18 /day. Assuming that the lake is at steady-state conditions and completely mixed, what would be the mass input of the herbicide?

Biochemical compounds are either hydrophilic, hydrophobic or ampiphatic. Classify the following compounds; glucose, stearic acid, soaps, fatty acids.

Ariana Grande wants to have a polished mirror finish to her steel ponytail. She consulted you as her trusted, talented, and inspiring chemical engineer, and you told her it could be achieved by chromium plating. What is the set of quantum numbers for the 19^th electron of chromium?

The Millennium Prize Problems consists of seven problems in mathematics that were stated by the Clay Mathematics Institute. You want to become the second person to solve one of these problems. What is the first Millennium Prize Problem solved?

Your friend, Selena Gomez, was curious which element of the following has the highest ionization energy? Antimony, Chlorine, Selenium, and Neon.

Which among the following is a constitutional isomer of trans-2-pentene?

You found out that everything you need is on the ground, and you were curious as to what element is the most abundant by mass on earth. What is it?

Which of the following is not an aromatic compound?

When Mikasa drinks alcohol, she experiences an Asian flush that makes her face red even without Eren. This is because she lacks what particular enzyme?

Californium-251 undergoes alpha decay and has a half-life of 900 years. How many alpha particles are emitted in 5 min by a 20-mg sample of Californium-251?

What volume of 0.1025M HCl must be added to 15.64mL of 0.0956 M NH₃ to produce solution  of pH = 9.00?

Treatment of hydroxylamine (H₂NOH) with an excess of Fe (II) results in the formation of N₂O and an equivalent amount of Fe(II):

2H₂NOH + 4Fe³⁺ — N2O(g) + 4Fe²+ + 4H+ + H₂O

Calculate the molar concentration of an H₂NOH solution if the Fe (II) produced by treatment of a 50.00-mL aliquot required 19.83 mL of 0.0325 M K₂Cr₂O₇.

Very fine suspended and colloidal impurities are removed by a process called

Microorganisms that exist at minimum temperature range of 25-45°C to optimum temperature range of 50 – 55°C and maximum temperature range of 60-85°C are called

Vitamin D is called the solar vitamin because its synthesis involves the ultraviolet irradiation of sterols. All of the following are sources of vitamin D except

The reaction 2 N₂O₅ (g) ® O₂ (g) + 4 NO₂ (g) is first order in N₂O₅. For this reaction at 40ºC, the rate constant k = 1.0 x 10^-5 s^-1. For a particular experiment, the initial [N₂O₅]₀ = 1.0 x 10^-3 M. Calculate the concentration of N₂O₅ after 3.8 x 10⁵ seconds.

Based on ionic radii and charges, which of the following solids would have the greatest lattice energy?

What alkyne would yield a single product upon ozonolysis?

The reaction A → B + C is second order in A. When [A]₀ = 0.100 M, the reaction is 20.0 % complete in 49.6 minutes. Calculate the half-life for the reaction.

Methoxyethane prepared using Williamson Synthesis uses __________ alcohol.

What fundamental equation relates the change in temperature which must accompany a change in pressure occurring in a system containing 2 phases of a pure substance in equilibrium?

For an adult human, how many amino acids are considered to be essential?

The number of electrons in a magnesium ion is

Substance capable of attracting water vapor.

What reagent will distinguish butane from butene?

The Philippines becomes a party in Stockholm Convention in the year ________.

From which of the given alkanes/cycloalkanes should it be easiest to prepare a single pure monochloro product?

The following reaction does not occur spontaneously (all ions at 1M concentration; all gases at 1 atmosphere pressure)

(A). 2Cr_(s) + 3Cl_{2(g) →}  2 Cr⁺³ + 6 Cl^–

(B). NO_3- + 2 H⁺ + Ag_{(s) →}  Ag+ + H₂O + NO_2(g)

(C). NO_3- + 4 H⁺ + 3 Ag_{(s) →}  3 Ag⁺ + NO_(g) + 2H₂O

(D). Cl_2(g) + 2 Br^– _→  2 Cl^– + Br₂

Molecular crystals typically

Which of the following is an acid anhydride?

What weight of sample in milligrams must be taken so that the % BaCl₂ (208.23) in the sample is equal to the milligrams of AgCl (143.32) precipitate?

A sample weighing 650 mg containing KCl, BaCl₂ and inert materials was dissolved in sufficient water and treated with 35.50 mL of 0.1510 M AgNO₃ and the excess required 8.74 mL of 0.2471 M KSCN. What is the percentage of KCl in the sample? KCl (74.55) BaCl₂ (208.24) AgCl (143.32)

Assuming Arrhenius Law applies, the ratio of the reaction constant when the temperature is changed from 300 K to 310 K is closest to what whole number?

If someone were to light a cigar at one end of a closed room, persons at the other end of the room might soon perceive an odor due to gaseous emissions from the cigar. Such a phenomenon is an example of

The following addition reaction of alkenes proceed via cis-addition except

Given the reaction: N₂O₄(g) ↔ 2NO₂(g).  If 1.631g of N₂O₄(g) initially reacted has a volume of 0.6 liters at equilibrium at 45 deg C and 803 mm Hg pressure, determine its Kp.