NAIMMCQ: Chemistry

Chemistry

Showing posts with label Chemistry. Show all posts

Which of the following objects, all moving at the same speed, will have the highest de Broglies wavelength?

A. a proton
B. an electron
C. a bowling ball
D. a neon atom
E. a nuetron

Answer: B

Which of the following is a correct formation reaction?

A. C (diamond) -> C(graphite)
B. H2 +O -> H2O
C. C(graphite) +4H -> CH4
D. 6C(graphite) +6H2O -> C6H12O6
E.2C(graphite) + 3H2 + 1/2O2 ->C2H5OH

Answer: E

Which of the following gases will be the fastest to diffuse through a room?

A. Methane, CH4
B.Hydrogen Sulfide H2S
C.Carbon dioxide, CO2
D. Water Vapor, H2O
E. Neon, Ne

Answer: A

Indicate the gas with the greatest density at 2.3 atm pressure and 22C degrees.

A. CH4
B. He
C. Ar
D. H2
E. O2

Answer: C

Which of the following substances is a strong acid?

A. CH3COOH
B. H2CO3
C. NH3
D.H3PO4
E. HNO3

Answer: E

Which of the following is a weak base?

A. Ca(OH)2
B. NH3
C. Ba(OH)2
D. NaOH
E. CH3COOH

Answer: B

Which of the following is a redox reaction?

A. 2Na +Cl2 -> 2NaCL
B. Ba^2 + SO4^-2 -> BaSO4
C. K2Cr2O7 + 2KOH ->2K2CrO4 + H20
D. Na2CO3 + 2HCL -> 2NaCl +CO2+ H2O
E. H2O -> H^+ +OH^-

Answer: A

Which of the following will produce a precipitate?

A. NaC2H3O2 and Pb(NO3)2
B. AgNO3 and KBr
C. NH4Cl and Li2SO4
D.KCl and Ca(NO3)2
E. NaOH and HCl

Answer: B

Which of the following is not ionic?

A. FeSO4
B. CaS
C. KBr
D. PF3
E. MgCl2

Answer: D

Which of the following will be the poorest conductor of electrical current when dissolved in water, assuming equal concentrations?

A. Acetic Acid CH3COOH
B. Sodium Chloride NaCl
C. Potassium Nitrate KNO3
D. Lithium Hydroxide LiOH
E. Sulfuric Acid H2SO4

Answer: A

Which of the following is a main group metal?

A.Cu
B. Si
C. Cl
D. Pb
E. Fe

Answer: D

Which of the following elements is liquid at room temperature?

A. Fluorine
B. Beryllium
C.Argon
D. Bromine
E. Sodium

Answer: D

Predict the charge that an ion formed from selenium would have.

A. 1-
B. 6+
C. 3-
D. 4+
E. 2-

Answer: E

Which of the following has the greatest number of electrons?

A. 13C
B. 14C^+5
C.19F
D.16O^2-
E.11B^3+

Answer: D

An element with the atomic number twelve

A. is C
B. is MG
C. has 12 neutrons, but could have a different number of protons.
D. must have 12 protons and 12 neutrons.
E. Has 12 electrons, but could have a different number of protons

Answer: B

Which of the following is approximately room temperature?

A. 273 K
B. 308K
C. 295k
D. 25K
E. 0K

Answer: C

If the distance between two charged particles is halved, the electrostatic force between them?

Answer: Doubles

Which represents the largest volume?

a. 10,000 microliters
b. 1000 picoliters
c. 100 ml
d. 10 nanoliters
e. 10 cm^3

Answer: C

Which of the following is not an Si base unit?

A. Meter
B.Coulomb
C.Second
E. Kelvin

Answer: B

The process of adding a known amount of solution of known concentration to determine the concentration of another solution is called

A. Neutralization
B. Hydrolysis
C. Titration
D. Buffer capacity

Answer: C