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Chem – Chapter 18: Qualitative Analysis + Chapter 19: Chromatography

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1

Which test identifies functional groups by reactions?

2

Which principle is the basis of chromatography?

3

What does a single spot on chromatogram indicate?

4

Which factor does NOT affect Rf value?

5

Which ion gives a lilac color in the flame test?

6

What acts as stationary phase in paper chromatography?

7

In thin-layer chromatography, the stationary phase is usually:

8

Which observation confirms ammonium ion?

9

Why lid is closed during chromatography?

10

Chromatography is useful in forensic science for:

11

Which analysis identifies ions present in a compound?

12

If two substances have same Rf value, it means they are:

13

Rf value is calculated by:

14

Which ion does not form a precipitate test easily?

15

What is chromatography mainly used for?

16

Which reagent is used to identify ammonium ion?

17

Chromatography can be used to separate:

18

Which gas turns limewater milky first and then clear?

19

Which precipitate is insoluble in ammonia?

20

Which gas is evolved when carbonate reacts with acid?

21

Which ion produces a green flame?

22

What is the maximum possible value of Rf?

23

Brick red flame indicates the presence of which ion?

24

Which precipitate dissolves in ammonia solution?

25

White precipitate with silver nitrate indicates which ion?

26

Which functional group produces CO₂ with acids?

27

What is a chromatogram?

28

Which application uses chromatography in medicine?

29

Which gas has a choking smell?

30

Why is the baseline drawn in pencil?

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