Question : The brown ring test is used for the detection of
Option 1: Phosphate
Option 2: Sulphate
Option 3: Nitrate
Option 4: Chloride
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Correct Answer: Nitrate
Solution : The correct option is Nitrate.
The brown ring test is a chemical test used for the detection of the nitrate ion (NO3−). The brown ring is formed due to the reaction between the nitrate ion and the iron(II) ion in the presence of sulfuric acid.
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Question : Vinegar used in cooking contains which of the following compounds?
Option 1: Methanol
Option 2: Sodium sulphate
Option 3: Ammonia
Option 4: Acetic acid
Question : Which of the following compounds is used as a drying agent?
Option 1: Calcium oxide
Option 2: Gypsum
Option 3: Calcium chloride
Option 4: Calcium hydroxide
Question : What is the chemical name for the ionic compound MgCl2?
Option 1: Sodium iodide
Option 2: Manganese chloride
Option 3: Caesium fluoride
Option 4: Magnesium chloride
Question : Select the most appropriate word for the given group of words. Scientific tests or techniques used in connection with the detection of crime.
Option 1: Post-mortem
Option 2: Autopsy
Option 3: Forensics
Option 4: Etymology
Question : Directions: Arrange the following words as per order in the dictionary. 1. Billian 2. Bifurcate 3. Bilateral 4. Bilirubin
Option 1: 2, 1, 3, 4
Option 2: 4, 3, 2, 1
Option 3: 2, 3, 4, 1
Option 4: 2, 3, 1, 4
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