What volume of 0.5mldm3 H2SO4 will exactly neutralize 20cm3 of 0.1moldm3 NaOH Solution?
2.0cm3
5.0cm3
6.8cm3
8.3cm3
Correct answer is A
2NaOH + H2SO4 → Na2SO4 + 2H2O
CaVa) ÷ (CbVb) = ratio of acid / ratio of base
0.5Va ÷ (0.1 × 20) = ½
Va = 2.0cm3
I, II and III
I and II only
III only
I only
Correct answer is D
Only primary alkanols undergo oxidation to produce alkanoic acid. Option A,B,C will not produce alkanoic acid
Hydrogen can be displaced from a hot alkaline solution by
Fe
Cu
Ca
Sn
Correct answer is D
Tin dissolves in concentrated solution of alkalis to give trioxostannate(IV) salt and hydrogen.
15.3cm3
87.3cm3
2.0cm3
97.0cm3
Correct answer is D
\(\frac{V_{1}}{T_{1}}\) = \(\frac{V_{2}}{T_{2}}\)
\(T_{1}\) = 3 + 273 = 276K
\(T_{2}\) = 18 + 273 = 291K
\(V_{1}\) = \(92cm^{3}\)
\(V_{2}\) = ?
\(V_{2}\) = \(\frac{V_{1}T_{2}}{T_{1}}\)
=\(\frac{92 \times 291}{276}\)
= \(97.0cm^{3}\)
Tartaric acid is used industrially to
make baking powder
make fruit juice
remove rust
dry substance
Correct answer is A
A is the correct answer. Tartaric acid is found in cream of tartar, which is used in cooking candies and frostings for cakes. Tartaric acid is also found in baking powder, where it serves as the source of acid that reacts with sodium bicarbonate (baking soda)