Science
In the reaction of aqueous solution of barium chloride with aqueous solution of sodium sulphate, the aqueous solution formed will be:
options
- BaCl2
- BaSO4
- Na2SO4
- NaCl
Answer
NaCl
Reason — When aqueous barium chloride (BaCl2) reacts with aqueous sodium sulphate (Na2SO4), a double displacement reaction (also called a precipitation reaction) takes place.
In this reaction, barium sulphate (BaSO4), which is insoluble in water, gets precipitated, and sodium chloride (NaCl) remains dissolved in the solution.
The chemical equation is :
BaCl2(aq) + Na2SO4(aq) → BaSO4(s)↓ + 2NaCl(aq)
Here:
- BaSO₄ is a white insoluble precipitate, and
- NaCl remains in the aqueous solution.
Hence, the aqueous solution formed is sodium chloride (NaCl).
Related Questions
Which of the following substances when dissolved in equal volume of water, will have the highest pH value?
options
- Sulphuric acid
- Acetic acid
- Magnesium hydroxide
- Sodium hydroxide
When excess of carbon dioxide is passed through lime water, the milkiness disappears because
options
- Water soluble calcium carbonate converts to water soluble calcium bicarbonate.
- Insoluble calcium carbonate converts to water soluble calcium bicarbonate.
- Water soluble calcium carbonate converts to insoluble calcium bicarbonate.
- Insoluble calcium carbonate converts to insoluble calcium bicarbonate.
Assertion (A) : C4H8, C4H6 and C4H10 are members of the same homologous series.
Reason (R) : C4H8, C4H6, C3H4, C3H6, C2H4, C2H2 are unsaturated hydrocarbons.
options
- Both A and R are true, and R is the correct explanation of A.
- Both A and R are true, and R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
The following activity is set-up in the science lab by the teacher. He clamped an aluminium wire on a stand and fixed a pin to the free end of the wire using wax. Then he heated the wire with a burner from the end where the wire is clamped. Students observed the pin fall off.
(a) If the teacher replaces aluminium wire by silver wire, will the students’ observation change? Justify your answer.
(b) Will the aluminium wire melt? Give reason for your answer.