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 = pKa
5
10
100
1
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) + Cl2(g) → NaCl(s)
Na(g) + Cl2(g) → NaCl(s)
Na(g) + Cl2(g) → NaCl(g)
B.
Na(s) + Cl2(g) → NaCl(s)
The correct reaction for the formation of NaCl is
Na (s) + Cl2 (g) → NaCl (s)
This is because the compounds are formed from their elements when they are present in their stable form.
Which of the ions is colourless inspite of the presence of unpaired electrons ?
La3+
Eu3+
Gd3+
Lu3+