dela Cruz, Marife S.

5ChE-C

General Inorganic Chemistry

1. He discovered Radon

a. Michael Faradayb. Frederick Dornc. Ludwig Planckd. Otto Stern

2. What is the chemical formula for Epsom salt?

a. MgSO4·7H2Ob. Na2CO3·7H2Oc. Na2CO3·10H2Od. CaSO4·2H2O

For numbers 3 -4

The reaction between aluminum and iron(III) oxide can generate temperatures approaching 30008C and is used in welding metals:

2Al + Fe2O3Al2O3+ 2Fe

In one process, 124 g of Al are reacted with 601 g of Fe2O3. MW: Al=26.98 Fe= 55.85

3. Calculate the mass (in grams) of Al2O3 formed.

a. 185.29 gb. 254.09 gc. 383.71 gd. 234.30 g

4. How much of the excess reagent is left at the end ofthe reaction?

a. 234.01 gb. 366.98 gc. 166.42 gd. 98.67 g

5. In a biochemical assay, a chemist needs to add 3.81 g of glucose to a reaction mixture.Calculate the volume in milliliters of a 2.53 M glucose solution she should use for theaddition.

a. 6.98 mL

b. 8.98 mLc. 7.15 mLd. 8.36 mL

Organic Chemistry

1. Which is not true about resonance structures?

a. Structures in which all the atoms have a compete valence shell are more stable.b. Charge separation increases stability.c. The more covalent bonds a structure has, the more stable t is.d. All of these are true.

2. What does the acronym IUPAC mean?

a. International Union of Physical and Analytical Chemistryb. International Union of Physical and Applied Chemistryc. International Union of Pure and Analytical Chemistryd. International Union of Pure and Applied Chemistry

3. Which is not true about hydrogen bonds?

a. Hydrogen bonds are weaker than ordinary covalent bonds.b. It is stronger than the dipole-dipole interactions of acetone.c. It occurs between hydrogen atoms bonded to small, strongly electronegative atoms

and nonbonding electron pairs on other such electronegative atoms.d. None of the above

4. What is the other term for London forces?

a. Dipole-dipole forcesb. Hydrogen forcesc. Dispersion forcesd. Van der Waals Forces

5. They have their atoms connected in the same sequence but they differ in the arrangement of their atoms in space.

a) Stereoisomersb) Constitutional Isomersc) Diastereomersd) Enantiomers

Medina, Althea Mae E.

ORGANIC CHEMISTRY

1. Strain that is a result of dispersion forces that cannot be relieved due to restricted conformational mobility

a. Torsional Strainb. Planar Strainc. Angle Straind. Axial Strain

2. Other name for Dispersion Forcesa. New York Forcesb. London Forcesc. Paris Forcesd. German Forces

3. Alcohol can be viewed structurally in 2 waysa. Hydroxyl derivative of water and alkyl derivatives of alkanesb. Hydroxyl derivative of alkanes and alkane derivatives of waterc. Hydroxyl derivative of alkenes and alkyl derivatives of waterd. Hydroxyl derivative of alkanes and alkyl derivatives of water

4. Length of bond of Benzenea. 1.39Åb. 1.34Åc. 1.54Åd. 1.59Å

5. Which is not true about chiralitya. A molecule will be chiral if it possesses a plane of symmetryb. A mirror plane is an imaginary plane that bisects a molecule such that the two

halves of the molecule are mirror images of each otherc. All molecules with a plane of symmetry in their most symmetric conformation are

achirald. A molecule will not be chiral if it possesses a plane of symmetry

GENERAL CHEMISTY1. Which of the following is an element?

a. Diamondb. Rubyc. Sapphired. Amethyst

2. Water is a good solvent of ionic salts becausea. it has no colourb. it has a high specific heatc. it has a high dipole momentd. it has a high boiling point

3. Amalgams area. alloys which contain mercury as one of the contentsb. highly colored alloysc. alloys which have great resistance to abrasion

d. alloys which does not contain carbon4. Isotopes are separated by

a. Filtrationb. Sublimationc. Distillationd. Crystallization

5. Which among the following is a positively charged particle emitted by a radioactive element?

a. Alpha rayb. Beta rayc. Cathode rayd. Delta ray

Caluag, Jiana Krizia D.

General Chemistry

1. ________________ states that different samples of the same compound always contain its constituent element in the same proportions by mass

a. Law of Conservation of Massb. Dalton’s Atomic Theoryc. Law of Definite Proportionsd. Law of Multiple proportions

2. He discovered the third subatomic particle called neutron.a. Ernest Rutherfordb. James Chadwickc. J.J Thompsond. Niels Bohr

3. Which of the following is an intensive property?a. temperatureb. lengthc. massd. volume

4. All of the following are true EXCEPTa. Atoms are made up of electrons, protons, and neutrons. b. All atoms of a given element contain the same number of neutrons.c. Chemical combinations of atoms are called compounds.

d. The atomic number of an element indicates the number of protons in each atom of the element.

5. What is the simplest formula of a compound that contains 52.2% C, 34.7% O, and 13.0% H by mass?

a. C4HO3

b. C12H3O8

c. C4H13O2 d. C2H6O