UTME 2023 LIVE QUESTION
The droplets of water observed around a bottle of milk taken out of the refrigerator is due to the fact that the
A. water vapour in the air around the bottle gains some energy from the bottle
B. temperature of the milk drops as it loses heat into the surroundings
C. saturated vapour pressure of the milk is equal to the atmospheric pressure
D. water vapour in the air around the bottle loses some of its energy to the bottle
UTME 2023 LIVE QUESTION
Moving from left to right across a period, the general rise in the first ionization energy can be attributed to the
A. decrease in nuclear charge
B. increase in nuclear charge
C. decrease in screening effect
D. increase in screening effect
UTME 2023 LIVE QUESTION
Permanent hardness of water can be removed by
A. filtration
B. adding slaked lime
C. adding caustic soda
D. boiling
UTME LIVE QUESTION
Which of the following is an example of a mixture?
A. Common salt
B. Blood
C. Sand
D. Washing soda
4)2.0 atm pressure, the volume of a gas is 4.0 L. If the pressure is reduced to 1.0 atm while keeping the temperature constant, what will be the new volume of the gas?
A. 2.0 L
B. 6.0 L
C. 8.0 L
D. 4.0 L
5)What is the main environmental concern associated with sulfur(IV)Oxide emissions?
A. Formation of acid rain
B. Global warming potential
C. Depletion of the stratospheric ozone
D. Depletion of the ozone layer
6)Benzene can be converted to its derivative toluene by the addition of a methyl group. The reaction is an example of
A. Nucleophilic substitution
B. Elimination reaction
C. Electrophilic substitution
D. Addition reaction
7)Which of the following mixtures is an example of a colloid?
A. Milk
B. Orange juice
C. Saltwater
D. Sugar dissolved in water
8)Which of the following substances is NOT hygroscopic?
A. Salt
B. Sugar
C. Silica gel
D. Aluminum
9)The heat of reaction can be determined experimentally using a device called a
A. Calorimeter
B. Barometer
C. Spectrometer
D. Thermometer
10)Which halogen is a gas at room temperature and is pale yellow in color?
A. Chlorine (Cl)
B. Fluorine (F)
C. Iodine (I)
D. Bromine (Br)
11)What unit of temperature should be used when applying the ideal gas law?
A. Fahrenheit (°F)
B. Kelvin (K)
C. Rankine (°R)
D. Celsius (°C)
12)Which of the following statements is true regarding the melting and boiling points of pure substances?
A. The boiling point is always higher than the melting point
B. The melting point is always higher than the boiling point
C. The melting and boiling points are always the same for all substances
D. The melting and boiling points can vary depending on the substance
13)The process of rusting is an example of the formation of
A. Basic oxide
B. Acidic oxide
C. Reducing oxide
D. Amphoteric oxide
14)What is the maximum number of electrons that can occupy the second energy level (n=2)?
A. 2 electrons
B. 18 electrons
C. 8 electrons
D. 32 electrons
15)Sodium reacts vigorously with water to produce
A. Sodium chloride (NaCl) and oxygen gas (O2)
B. Sodium nitrate (NaNO3) and water (H2O)
C. Sodium hydroxide (NaOH) and hydrogen gas (H2)
D. Sodium oxide (Na2O) and hydrogen gas (H2)
16)What is the molecular geometry of a molecule with three bonding pairs and no lone pairs around the central atom?
A. Tetrahedral
B. Trigonal planar
C. Linear
D. Octahedral
17)Which transition metal is known for its multiple colorful oxidation states and compounds used in pigments and paints?
A. Silver (Ag)
B. Copper (Cu)
C. Gold (Au)
D. Zinc (Zn)
