JEE CHEMISTRY UNIT 20
QUIZ NO 1
TOTAL QUESTIONS = 20
1. What is the role of KMnO4 in qualitative analysis
A. Oxidizing agent
B. Catalyst
C. Precipitating agent
D. Reducing agent
2. What is the principle behind the separation of components in chromatography
A. Boiling point
B. Molecular weight
C. Melting point
D. Polarity difference
3. What is the confirmatory test for oxalate ions
A. Brown ring test
B. Formation of white precipitate with calcium chloride
C. Reaction with silver nitrate
D. Effervescence with dilute acid
4. What is the color of the flame test for potassium ions
A. Blue
B. Yellow
C. Green
D. Violet
5. What is the color of the precipitate formed when silver nitrate reacts with potassium bromide
A. White
B. Yellow
C. Green
D. Red
6. Which ion gives a blue precipitate with ammonium hydroxide in an aqueous solution
A. Zinc ion
B. Iron(II) ion
C. Lead ion
D. Copper(II) ion
7. Which of the following is used as a primary standard in titrations
A. Acetic acid
B. Hydrochloric acid
C. Sulfuric acid
D. Oxalic acid
8. Which compound is used as a standard solution in volumetric analysis
A. Potassium permanganate
B. Sodium chloride
C. Barium chloride
D. Sodium carbonate
9. What is the pH of a neutral solution at 25°C
A. 5
B. 7
C. 0
D. 10
10. What is the color of Fehling's solution after reacting with glucose
A. Green
B. Red
C. Yellow
D. Blue
11. Which of the following is used in flame tests
A. Potassium nitrate
B. Copper sulfate
C. Sodium chloride
D. Calcium carbonate
12. What is used as the stationary phase in paper chromatography
A. Paper
B. Silica gel
C. Charcoal
D. Alumina
13. Which cation gives a green flame test
A. Copper
B. Sodium
C. Barium
D. Calcium
14. Which reagent is used to distinguish between aldehydes and ketones
A. Ammoniacal silver nitrate
B. Tollens' reagent
C. Benedict's solution
D. Iodine solution
15. What is the purpose of heating a solution during crystallization
A. To remove impurities
B. To dissolve the solute
C. To increase crystal size
D. To evaporate solvent
16. Which of the following is used to neutralize an acid spill
A. Sodium carbonate
B. Calcium hydroxide
C. Baking soda
D. Sodium hydroxide
17. What is the test for the presence of ammonium ions
A. Brown ring test
B. Reaction with silver nitrate
C. Addition of potassium iodide
D. Reaction with sodium hydroxide and warming
18. Which compound is commonly used as a drying agent in the lab
A. Magnesium chloride
B. Sodium hydroxide
C. Calcium chloride
D. Sodium chloride
19. Which gas is produced when magnesium reacts with dilute sulfuric acid
A. Chlorine gas
B. Nitrogen gas
C. Carbon dioxide gas
D. Hydrogen gas
20. Which ion forms a blue-colored complex with ammonia
A. Calcium
B. Iron(II)
C. Copper(II)
D. Zinc
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