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Old June 4th, 2016, 12:45 PM
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Default jexpo ans key

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Old May 20th, 2017, 11:33 AM
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I want the sample question paper of JEXPO Exam for preparation so can you provide me? Also provide me their answer key?
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Old May 20th, 2017, 11:35 AM
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Default Re: jexpo ans key

Ok, I am providing you the solved question paper of JEXPO Exam.

JEXPO Exam solved question paper

Chemistry


1. Phenolphthalein is an :
a) Acid Salt b) Acid
c) Alkali d) Indicator
Ans: d) Indicator

2. Coagulant used for the treatment of waste water is:
a) NaCl b) Na2SO4
c) FeSO4 d) KCl
Ans: c) Na2SO4

3. Most commonly used vulcanising agent is :
a) Sulphur b) Dimond
c) Graphite d) Phosphorous
Ans: a) Sulphur

4. Which of the following compounds decolorised red bromine water solution:
a) CH4 b) C2H6
c) C2H4 d) CCl4
Ans: CCl4

5. Which of the following compounds contains a double bond :
a) C2H2 b) CH4
c) C2H4 d) C2H4
Ans: c) C2H4

6. What is the pH value of 10-8N HCL:
a) 8 b) 6
c) 6.98 d) 9
Ans: a) 8

7. Galvanization means plating by :
a) Zn b) Sn
c) Ni d) Cu
Ans: a) Zn

8. For cathodic protection the mostly used metal is :
a) Zn b) Ca
c) Ni d) Mg
Ans: a) Zn

9. Which can stop bleeding due to small cut most easily ? :
a) K2SO4 b) NaCl
c) Sugar d) Alum
Ans: d) Alum

10. Natural rubber consists of :
a) 1,3 butadiene b) Isoprene
c) But-1-ene d) Styrene
Ans: a) 1,3 butadiene

11. Which is used as lubricant? :
a) NaOH b) FeCl3
c) H3PO4 d) MoS2
Ans: d) MoS2

12. Picric acid is :
a) 2,4,6 trinitro benzoic acid b) 2,4-dinitro benzoic acid
c) 2,6-dinitro phenol d) 2,4,6-trinitro phenol
Ans: d) 2,4,6-trinitro phenol

13. The compound used in plastic industry :
a) C2H4 b) HCHO
c) C6H5OH d) All of them
Ans: d) All of them

14. Which one of the following elements in coal decreases its Calorific value :
a) Nitrogen b) Hydrogen
c) Sulphur d) Carbon
Ans: a) Nitrogen

15. A chemical reaction is at equilibrium when :
a) The reactants are completely transformed in to products
b) The rate of froward and backward reactions are equal
c) Formation of product is stoped
d) Equal amount of reactants and products are present
Ans: d) Equal amount of reactants and products are present

16. Octane number of Isooctane is :
a) 0
b) 100
c) 92
d) 104
Ans: b) 100

17. Corrosion is a process of :
a) Oxidation
b) Reduction
c) Precipitation
d) Sublimation
Ans: a) Oxidation

18. Temporary hardness of water is due to :
a) CaCl2
b) MgSO4
c) Ca(HCO3)2
d) CaCO3
Ans: c) Ca(HCO3)2

19. The suitability of a diesel fuel is determined by :
a) Octane Number
b) Length of hydrocarbon chain
c) Cetane number
d) % of carbon
Ans: c) Cetane number

20. Which one produces red ppt. with ammoniacal Cu2Cl2 :
a) Ethene
b) Ethane
c) Ethyne
d) both a and c
Ans: d) both a and c

21. DDT is obtained when chlorobenzene is treated with the following in presence of con. H2SO4 :
a) CH3CHO
b) HCHO
c) CCl3CHO
d) CH3COOH
Ans: c) CCl3CHO

22. The main constituent of LPG is :
a) Methene
b) Butane
c) Ethane
d) Propane
Ans: b) Butane

23. How many atomes are present in 0.98 gm H2SO4 :
a) 6.023 x 1021
b) 3.012 x 1023
c) 4.21 x 1022
d) 3.02 x 1021
Ans: a) 6.023 x 1021

24. A fuel gas, which is also used as a source of hydrogen is :
a) Producer gas
b) Coal gas
c) Water gas
d) Natural gas
Ans: c) Water gas

25. The number of molecules in 1 mole methane (CH4) at 546 K and under 2 atmosphere pressure is :
a) N
b) 2N
c) >N but <2N
d) <N
Ans: a) N

For more questions here is the attachment
Attached Files
File Type: pdf JEXPO Exam question paper.pdf (690.4 KB, 0 views)
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