Chlorine (Cl¹⁷) free radical contains how many electrons around the nucleus?

• 16

• 17

• 18

• 19

4 L- atom is equal to

• 40.50 cal

• 78.75 cal

• 95.23 cal

• 96 cal

How many gram-equivalents of NaOH are required to neutralise 25 cm³ of a decinormal HCl solution?

• 0.00125

• 0.0025

• 0.0050

• 0.025

Ammonium acetate which is 0.01 M, is hydrolysed to 0.001 M concentration. Calculate the change in pH in 0.001 M solution, if initially pH = pK_a

• 5

• 10

• 100

• 1

1 mol alcohol reacts with Na to give what weight of hydrogen ?

• 1 gm

• 2 gm

• 3 gm

• 3.5 gm

Find the correct equation

• E₂ - E₁ - H₂ + H₁ = n₂RT - n₁RT

• E₂ - E₁ - H₂ - H₁ = n₂RT - n₁RT

• H₂ - H₁ - E₂ + E₁ = n₂RT - n₁RT

• H₂ - H₁ - E₂ - E₁ = n₂RT - n₁RT

Reaction for the formation of NaCl is

• Na(g) + Cl₂(g) → NaCl(s)

• Na(s) + $\frac{1}{2}$Cl₂(g) → NaCl(s)

• Na(g) + $\frac{1}{2}$Cl₂(g) → NaCl(s)

• Na(g) + Cl₂(g) → NaCl(g)

1 u (amu) is equal to

• 1.492 × 10^-10 J

• 1.492 × 10^-7 J

• 1.492 × 10^-13 J

• 6.023 × 10²³ J

9.

Which of the ions is colourless inspite of the presence of unpaired electrons ?

• La³⁺

• Eu³⁺

• Gd³⁺

• Lu³⁺

Conjugate acid-base pair differ by

• electron

• proton

• neutron

• hydroxyl group