Question 1 of 20 4,306 total questions
When NH4 Cl(s) is dissolved in water, the container feels cold to touch. This implies
A The process is endothermic
B The process is exothermic
C NH4 Cl forms a saturated solution
D NH4 Cl is highly soluble in water
An aqueous solution of (NH4)2 SO4 is
A Acidic
B Alkaline
C Amphoteric
D Neutral
The energy which accompanies the addition of an electron to an isolated gaseous atom is
A Atomization
B Electronegativity
C Electron affinity
D Ionization
Propane carbon(IV)oxide diffuse at the same rate because [H = 1.00, C = 12.0, O = 16.0]
A They are both gases
B Their molecules contain carbon
C They have the same relative molecular mass
D Both are denser than air
The spreading of the scent of a flower in a garden is an example of_____?
A Brownian motion
B Diffusion
C Osmosis
D Tynadal effect
The general gas equation \(\frac{PV}{T}\) = K is a combination of
A Boyle's and Charles' laws
B Boyle's and Graham's laws
C Charles' and Graham's laws
D Dalton's and Graham's laws
Which of the following apparatus can be used to measure a specific volume of a liquid accurately?
A Beaker
B Conical flask
C Measuring cyclinder
D Pipette
Which of the following statements about solids is correct?
A Solid particles are less orderly than those of a liquid
B Solid have lower densities than liquids
C Solid particles have greater kinetic energies than those of liquids
D Solid particles cannot be easily compressed
How many moles of oxygen would contain 1.204 x 1024 molecules?23 ]
An element X froms the following oxides X2 O, XO and XO2 . This phenomenon illustrates the law of________?
A Conservation of mass
B Definite proportion
C Mass action
D Multiple proportion
The bond formed between H2 O and H+ to form the hydroxonium H3 O+ is
A Dative
B Covalent
C Electrovalent
D Ionic
The minimum amount of energy required for effective collisions between reacting particles is known as
A Activation energy
B Bond energy
C Kinetic energy
D Potential energy
Which of the following elements would produce coloured ion in agueous solution?
A Calcuim
B Copper
C Magnesuim
D Sodium
The shape of the water molecule is_______?
A Linear
B Pyramidal
C Tetrahedral
D V-shaped
Which of the following arrangements shows increasing order of reactivity of the halogens?
A F2 > Cl2 > Br2 >I2
B I2 < Br2 < Cl2 < F2
C F2 < Cl2 < Br2 < I2
D I2 > Br2 > Cl2 > F2
An unsaturated solution differs from a saturated solution at a given temperature because it
A Cannot dissolve more solute
B Can hold more solute than it can actually dissolve
C Can still dissolve more solute at given temperature
D Form crystal more easily on cooling
Aluminium is used in the manufacture or aircraft because it
A Is hard and brittle
B Is light and resists corrosion
C Has high density and conducts electricity
D Is malleable and ductile
Metals can be stretched into wires because they are
A Ductile
B Good conductors
C Lustrous
D Malleable
The mass of potassium hydroxide required to make 300.ocm3 of 0.4 moldm-3 solution is {KOH = 56.0}
A 26.88g
B 13.44g
C 6.72g
D 3.36g
Chemicals that are produced in small quantities and with very degree of purity are
A Bulk chemicals
B Fine chemicals
C Heavy chemicals
D Light chemicals
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