From above periodic table of elements, amongst other supplied detail of each element, is the Electronegativity strength indication. Which of the following statement correctly defines Electronegativity?
|
type="()" }
+ (A) A measure of the tendency of an atom to attract a bonding pair of electrons.
- (B) A measure of the atomic Electrical potential.
- (C) Electronegativity of an atom is related to it's mass.
- (D) None of the above.
{
According to the Period table in question 1, Fluorine (F) is the most Electronegative element at 4.0. this means that...
|
type="()" }
- (A) Fluorine forms only polar bonds.
+ (B) The bonding pair of electrons will be closer to the fluorine atom in a chemical bonding involving other atoms except another Fluorine atom.
- (C) Fluorine forms only Pure-covalent bonds.
- (D) Fluorine only forms ionic bonds.
{
Uranium is mainly used in nuclear power stations to produce electricity. Enriched 235U is preferred to 238U in nuclear reactors. Which of the following statements is true about 235U & 238U?
|
type="()" }
- (A) 235U is more toxic than 238U.
- (B) 235U is cheaper than 238U.
- (C) 238U does not react in nuclear fission.
+ (D) 235U is an Isotope of 238U.
{
As an industrial application,a Zinc (Zn) layer is used to cover Iron (Fe) Hulls of big ocean liners. Which of the following statements is true about this application?
|
type="()" }
+ (A) Zinc protects Iron from corrosion by Oxidation.
- (B) Zinc decreases building cost as it is cheaper than Iron.
- (C) Zinc decreases the total weight as it is lighter than Iron.
- (D) None of the above.
{
The following diagram shows a standard Zinc/Iron Electrochemical Cell.
Which electrode is a cathode in the above diagram?
|
type="()" }
- (A) Zinc (Zn) electrode.
+ (B) Iron (Fe) electrode.
- (C) both.
- (D) none of the above.
{
Consider the following reaction of Hydrogen gas with Iodine gas to form Hydrogen Iodide gas, being at equilibrium.
The pressure is then increased at time t in the container at a constant temperature of 400°C?
Which of the following graphs represent the change in concentration of the three gases as a result of compression?
|
type="()" }
- (A)
- (B)
- (C)
+ (D)
{
The melting point of two solids X and Y are 940°C and 925°C respectively. At temperature of 900°C, X conducts electricity but Y doesn't. At 950°C both conduct electricity. X & Y could be...
|
type="()" }
+ (A) X: Metallic Solid ; Y: Ionic Solid
- (B) X: Mollecular Solid ; Y: Metallic Solid
- (C) X: Ionic Solid ; Y: Mollecular Solid
- (D) X: Mollecular Solid ; Y: Ionic Solid
{
The complete combustion of an alkane can be represented as follows:
alkane + O2 X + Y
The products X and Y are ...
|
type="()" }
- (A) X: Carbon ; Y: Water.
+ (B) X: Carbon dioxide ; Y: Water.
- (C) X: alkene ; Y: Carbon dioxide.
- (D) X: alkyne ; Y: Water.
{
The volume of a certain mass of gas is 150dm3. The pressure of the gas is then halved at constant temperature. The volume of the gas will now be ...
|
type="()" }
- (A) 75dm3.
- (B) 150dm3.
+ (C) 300dm3.
- (D) 600dm3.
{
In most HV & LV plant rooms, carbon dioxide fire extinguishers are installed in clearly visible and accessible locations. which of the following statements best describes how CO2 extinguishers work?
|
type="()" }
- (A) CO2 is non-flammable thus it extinguishers fire.
+ (B) CO2 extinguishers fire by depleting Oxygen around fire.
- (C) CO2 reduces atmospheric pressure to stop fire.
- (D) CO2 fire extinguishers are not suitable for Electrical fires.
</quiz>
|
Template:Quiz
|
|
|
|
|
|
|
|
|
