Chemistry Mart Sem 1 set C

Balance the redox reaction below in an acidic condition:

Cu + NO₃^- ⟶ Cu²⁺ + 2NO

• 3Cu + 2NO₃^- + 8H⁺ ⟶ 3Cu²⁺ + 2NO + 4H₂O

• 3Cu + 2NO₃^- + 4H₂O ⟶ 3Cu²⁺ + 2NO

• 6Cu + 2NO₃^- + 8H⁺ ⟶ 6Cu²⁺ + 2NO + 4H₂O

• 3Cu + 2NO₃^- + 4H⁺ ⟶ 3Cu²⁺ + 2NO

The Balmer series in the hydrogen spectrum is found in

• the ultraviolet region

• the infrared region

• the visible region

• the x-ray region

The electronc configuration of element X is.......... 3s² 3p⁶ 3d¹⁰ 4s² 4p3. This means that the element X is

• d-block element

• a group 13 element

• a group 14 element

• a group 15 element

Which of the following compounds can form hydrogen bonds?

• CH₄

• CH₃OH

• CH₃-O-CH₃

• HCN

Under which set of condition will real gas shows ideal behaviour?

• Temperature: Low

  Pressure: High

• Temperature: High

  Pressure: High

• Temperature: Low

  Pressure: Low

• Temperature: High

  Pressure: Low

Consider the following reaction:

P + Q ⇌ 2R + S

Which of the following statement is TRUE when the system is at equilibrium?

• Both the forward and the reverse reactions have stopped

• Neither the forward nor the reverse reaction has stopped

• The rate of forward reaction is decreased due to the increase in the rate of the reverse reaction

• The sum of the concentration of P and Q must equal to the sum of the concentration of R and S

Which of the following ions reacts as Bronsted-Lowry acid and base?

• HCO₃^-

• OH^-

• CO₃^2-

• HCl

Which of the following represent molecular formula and its empirical formula?

• Molecular formula: CH₄

  Empirical formula: CH₄

• Molecular formula: C₂H₁₂

  Empirical formula: C₂H₆

• Molecular formula: C₄H₈

  Empirical formula: C_nH_2n

Which one of the following pair would form a non-polar covalent bond?

• Cl and Cl

• Ne and Ne

• C and O

Which of the following can affect the value K_sp for calcium sulphate?

• Change in temperature

• Addition of solid CaCl₂

• Addition of dilute sulphuric acid