Question 1

Which of the following statements best describes Dalton’s atomic theory?

Accepted Answer

Atoms of the same element are identical in mass and properties, and chemical reactions involve rearrangement of atoms.

Question 2

A sample contains 0.5 moles of $$\mathrm{NaCl}. $$What is the mass of $$\mathrm{NaCl} in $$the sample? (Molar mass of $$\mathrm{NaCl} = 58.5\ \mathrm{g/mol})$$

Accepted Answer

$$29.25\ \mathrm{g}$$

Question 3

Which of the following is NOT a colligative property?

Accepted Answer

Viscosity

Question 4

A gas sample at $$300\ \mathrm{K}$$ has a root mean square speed $$u_{rms} of$$ $$500\ \mathrm{m/s}. $$What will be the $$u_{rms} at$$ $$600\ \mathrm{K}$$?

Accepted Answer

$$707\ \mathrm{m/s}$$

Question 5

Which quantum number determines the shape of an orbital?

Accepted Answer

Azimuthal quantum number ($$l)$$

Question 6

Which of the following molecules has sp$$^2$$ hybridization at the central atom?

Accepted Answer

$$\mathrm{BF_3$}$$

Question 7

Which statement about entropy ($$S) is $$correct?

Accepted Answer

Entropy is a measure of the disorder or randomness of a system.

Question 8

For the reaction $$\mathrm{N_2$}(g) + 3\mathrm{H_2$}(g) \rightarrow 2\mathrm{NH_3$}(g)$$, which change will shift the equilibrium to the right according to Le Chatelier’s principle?

Accepted Answer

Increasing the pressure

Question 9

Which of the following is the correct expression for the Nernst equation for a cell at $$25^\circ\mathrm{C}$$?

Accepted Answer

$$E_{cell} = E^\circ_{cell} - \dfrac{0.0591}{n} \log Q$$

Question 10

The rate law for a reaction is $$	ext{Rate} = k[A]^2[B]. $$What is the overall order of the reaction?

Accepted Answer

Third order

Question 11

Which of the following statements about hydrogen bonding is correct?

Accepted Answer

Hydrogen bonding is responsible for the high boiling point of water.

Question 12

Which element has the highest electronegativity according to the modern periodic table?

Accepted Answer

Fluorine

Question 13

Which of the following is a correct statement about the $$s-$$block elements?

Accepted Answer

Alkali metals react vigorously with water to produce hydrogen gas.

Question 14

Which compound is formed when benzene undergoes nitration?

Accepted Answer

Nitrobenzene

Question 15

Which of the following is the correct product of the reaction of an aldehyde with Tollens’ reagent?

Accepted Answer

A silver mirror and a carboxylic acid

Question 16

Which of the following is a correct statement about polymers?

Accepted Answer

Nylon-6,6 is formed by condensation polymerization.

Question 17

Which of the following is a correct statement about environmental chemistry?

Accepted Answer

Green chemistry focuses on designing chemical processes that reduce or eliminate the use and generation of hazardous substances.

Question 18

Which of the following is the correct IUPAC name for the compound $$\mathrm{CH_3CH_2COOH}$$?

Accepted Answer

Propanoic acid

Question 19

Which of the following statements about the structure of DNA is correct?

Accepted Answer

DNA consists of two antiparallel strands held together by hydrogen bonds between complementary bases.

Physics and Chemistry College Entrance Syllabus: Structured Study Notes

Study Guide - Practice Questions

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