The gaseous product formed when ammonia is passed over heated copper (ll) oxide is
oxygen
nitrogen
hydrogen
nitrogen (l) oxide
Correct answer is B
No explanation has been provided for this answer.
Sodium chloride is used in the following processes except in the
treatment of polluted water
preservation of food
separation of soap from glycerol
manufacture of chlorine
manufacture of caustic soda
Correct answer is A
No explanation has been provided for this answer.
hydrogen bonding
metallic bonding
covalent bonding
ionic bonding
van der Waals' forces
Correct answer is A
No explanation has been provided for this answer.
Reducing agent
A bleaching agent
A dehydrating agent
A sulphonating agent
An oxidizing agent
Correct answer is A
No explanation has been provided for this answer.
Which of the following reactions is accompanied by the first ionization energy of an element X?
X +(aq) → X 2+ (aq) + e-
X - (g) → X(g) + e-
X+ (g) → X2+ +e-
X (g) → X+ (g) +e-
X(s) → X + (g) + e-
Correct answer is D
ionization energy (IE) is the minimum energy required to remove an isolated gaseous atom's most loosely bound electron. The first ionization energy is quantitatively expressed as
\(X_{(g)} + energy ⟶ X^+_{(g)} + e^−\)
where X is any atom or molecule, \(X^+\) is the resultant ion when an electron( \(e^−\)) was removed from the original atom.