ECAT Pre Engineering Chemistry Chapter 2 MCQ Test With Answer

Question # 1

A filtration process could be very time consuming if it were not aided by a gentle suction which is developed:

If the paper covers the funnel up to its circumstances A
If the paper has got small sized pores in B
If the stem of funnel is large so that it dips in to filtrate C
If the paper fits tightly. D

Question # 2

Fluted filter paper is used to:

Decrease rate of filtration A
Increase rate of filtration B
Maintain rate of filtration C
None of above D

Question # 3

The apex angle of the folded filter paper is slightly greater is termed as:

60 degree A
30 degree B
45 degree C
90 degree D

Question # 4

During the process of crystallization, the hot saturated solution:

is cooled very slowly to get large size crystals A
is cooled at a moderate rate to get medium sized crystals of the product B
is evaporated to get the crystals of the products C
is mixed with an immiscible liquid to get the pure crystals of the product. D

Question # 5

The filtration process is used to to separate solid from :

Liquid. A
Gas. B
Solid. C
All of above. D

Question # 6

Solvent extraction method is a particularly useful technique of separation when the product to be separated is:

non-volatile or thermally unstable. A
volatile or thermally stable. B
non-volatile or thermally stable. C
volatile or thermally unstable. D

Question # 7

Solvent extraction is an unstable,Process and it is controlled by:

Alcohol extraction A
Petrol extraction B
Phenol extraction C
Ether extraction D

Question # 8

In CCL4 solvent I3 shows:

Blue Color A
Brown Color B
Purple Color C
Pink Color D

Question # 9

Estimation of Na in sea water is an example of :

Numerical analysis. A
Qualitative analysis. B
Quantitative analysis. C
None of above. D

Question # 10

Without proper suction filtration is

Rapid process. A
Fague process. B
Slow process. C
Useless process. D

Question # 11

The detection of functional group is called:

Numerical analysis A
Qualitative analysis B
Quantitative analysis C
Combustion analysis D

Question # 12

Which one of the following substance is use as decolonizing agent

Asbestos A
Animal charcoal B
conc, H₂SO₄ C
Silica gel D

Question # 13

The tip of funnel should be 1 or 2cm larger than the circle of the

Beaker A
Solid B
Filter paper C
Liquid D

Question # 14

95% ethanol is called :

Rectified ether. A
Diesel. B
Rectified spirit. C
Petrol. D

Question # 15

A complete chemical Characterization of a compound must include:

Qualitative analysis A
Chemical analysis B
Quantitative analysis C
None of above D

Question # 16

The comparative rates at which the solutes move in paper chromatography, depend on:

the size of per sued. A
R_f values of solutes B
temperature of the experiment C
size of the chromatography tank used. D

Question # 17

Estimation of Na in sea water is an example of

Numerical analysis A
Qualitative analysis B
Quantitative analysis C
None of above D

Question # 18

Proteins and amino acid can be separated by:

Filtration A
^Sublimation B
Chromatography C
Suction D

Question # 19

The tip of the funnel should touch the side of the beaker in order to avoid :

Splashing. A
Leakage. B
Mixing. C
Contamination. D

Question # 20

Analytical chemistry is the science of

Chemical characterization A
Physical characterization B
Biological characterization C
Biochemical characterization D

Question # 21

The detection of functional group is called

Numerical analysis A
Qualitative analysis B
Combustion analysis C
Quantitative analysis D

Question # 22

Without proper suction,filtration is:

Rapid process A
Fague process B
Slow process C
Useless process D

Question # 23

Which one of the following substances is used to decolourizing agent

Abestos A
Animal charcoal B
conc. H2SO4 C
Silica gel D

Question # 24

Direct conversion of solid intro vapours is called:

Crystallization A
Sublimation B
Obligation C
Vapourization D

Question # 25

The apex angle of the folded filter paper is slightly greater than :

60°
A
30° B
45° C
90° D

Question # 26

Analytical chemistry is the science of :

Chemical Characterization. A
Physical Characterization. B
Biological Characterization. C
Biochemical Characterization. D

Question # 27

The liquid obtained after passing the mixture through filter paper is termed as :

Extract. A
Residue. B
Filtrate. C
Sample. D

Question # 28

The solid remained on filter paper during the filtration is called the :

Substance. A
Residue. B
Undue. C
Filtrate. D

Question # 29

The reagents like KMnO_{4 and HCL cannot be filtered through Gooch crucible if its base is covered with :}

Butterfly paper. A
Ordinay paper. B
Flying paper. C
Filter paper. D

Question # 30

Which one of the following substance is no used as drying agent in desiccators

Silica gel A
CaCl₂ B
Phosphorous C
NaCL(50%) D

Sr.#	Question	Answer
1	The apex angle of the folded filter paper is slightly greater than :	A. 60° B. 30° C. 45° D. 90°
2	Solvent extraction method is a particularly useful technique of separation when the product to be separated is:	A. non-volatile or thermally unstable. B. volatile or thermally stable. C. non-volatile or thermally stable. D. volatile or thermally unstable.
3	A complete chemical characterization of a compound must include	A. Qualitative analysis B. Chemical analysis C. Quantitative analysis D. Both a and c
4	Solvent extraction is an unstable,Process and it is controlled by:	A. Alcohol extraction B. Petrol extraction C. Phenol extraction D. Ether extraction
5	A filtration process could be very time consuming if it were not aided by a gentle suction which is developed:	A. If the paper covers the funnel up to its circumstances B. If the paper has got small sized pores in C. If the stem of funnel is large so that it dips in to filtrate D. If the paper fits tightly.
6	Proteins and amino acid can be separated by:	A. Filtration B. ^Sublimation C. Chromatography D. Suction
7	The detection of functional group is called :	A. Numerical analysis. B. Qualitative analysis. C. Combustion analysis. D. Quantitative analysis.
8	The liquid obtained after passing the mixture through filter paper is termed as:	A. Extract B. Residue C. Filtrate D. Sample
9	Identification of a substance, determination of its structure an quantitative analysis of its composition are the aspects covered by:	A. Modern analytical physics. B. Mechanical chemistry. C. Biochemistry. D. Modern analytical chemistry.
10	The sample being analyzed is called:	A. Electrolyte B. Residue C. Undue D. Filtrate

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