Chemistry
Assertion (A): Sodium chloride and potassium chloride can be distinguished by flame test.
Reason (R): Sodium salt produces a red flame and potassium salt produces a lilac flame.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Answer
A is true but R is false.
Explanation — Sodium chloride and potassium chloride can be distinguished using flame text. Sodium salt produces golden yellow flame and potassium salt produces lilac flame. Hence, the assertion (A) is true.
Sodium salt produces golden yellow flame rather than red flame and potassium salt produces lilac flame. Hence, the reason (R) is false.
Related Questions
Assertion (A): Glass rod dipped in NH4OH gives dense white fumes with HCl gas.
Reason (R): HCI gas is acidic in nature.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): Zinc nitrate on heating produces a colourless gas, brown gas and yellow residue which fuses with the glass.
Reason (R): Zinc nitrate decomposes to give ZnO, NO2 and O2.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Match the gases in column I to the identification of the gases mentioned in column II
Column I Column II (a) Hydrogen sulphide A. Turns acidified potassium dichromate solution green (b) Nitric oxide B. Turns lime water milky (c) Carbon dioxide C. Turns reddish brown when it reacts with oxygen (d) Sulphur dioxide D. Turns moist lead acetate paper silvery black Match column A with column B
Column A Colum B (a) Blue salt changes to white and then black (i) Ammonium dichromate (b) Orange coloured compound changes to green (ii) Iodine (c) Red compound changes to brown and then yellow (iii) Zinc Nitrate (d) White to yellow when hot and white when cold (iv) Copper Sulphate (e) Violet solid changes to violet vapours (v) Red Lead