In the electrolysis of brine, the anode is

• A. platinum
• B. copper
• C. zinc
• D. carbon

Which of the following statements about ideal gases is/are correct? 1. The cohesive forces between their particles are negligible ll. The have no definite volume but occupy the volume of their containers III. They are not compressible IV. Their particles collide with loss of energy

• A. l only
• B. l and ll only
• C. l, ll and lll only
• D. l, ll, lll, and IV

The reactions below represent neutralization reaction, in which of them is the value of ΔH highest?

• A. CH\(_3\)CH\(_2\)COOH + KOH ? CH\(_3\)CH\(_2\)COOK + H\(_2\)O
• B. NH\(_4\)OH + HCL → NH\(_4\) + H\(_2\)O
• C. NaOH + HCL → NaCL + H\(_2\)O
• D. CH\(_3\)COOH + NaOH → CH\(_3\)COONa + H\(_2\)O

Which of the following is correct about the electrons in the 1s orbital? They

• A. have the same spin
• B. are easier to remove than those in the 2p orbital
• C. are closest to the nucleus
• D. have the same energy as those in the 2s orbital

To what temperature must a gas be raised from 273K in order to double both its volume and pressure?

• A. 298k
• B. 300k
• C. 546k
• D. 1092k

The number of unpaired electrons in an atom of an element₈Q is _______?

• A. 2
• B. 4
• C. 6
• D. 8

Cr2O 2 − 7 (aq) + H2O(1)⇌ 2CrO 2 − 4 (aq) + 2H + (aq) What happens to the reaction above when the hydrogen ion concentration is increased?

• A) more of the products will be formed
• B) the reaction will not proceed
• C) the equilibrium position will shift to the right
• D) the equilibrium position will shift to the left.

How many isomers does pentane have?

• A. 6
• B. 5
• C. 4
• D. 3

The product formed when propanol is heated over a copper catalyst in the absence of oxygen are

• A) CH3CH2CHO and H2
• B) CH3CHO and CO2
• C) CH3CH2COOH and H2
• D) CH3COOH and CO2

How many cations will be produced from a solution of potassium aluminium tetraoxosulphate (VI)?

• A) 3
• B) 4
• C) 1
• D) 2