RGPV Chemistry Objectives | CY110 CY111 Chemistry MCQ
1.
A substance used to reduce friction
between two moving or sliding surfaces is known as
oil
lubricant
gas
fuel
Ans:-> lubricant
2.
Grease is a
solid lubricant gaseous
lubricant
liquid lubricant
semi solid lubricant
Ans:->: semi solid lubricant
3.
The relation between the viscosity of
a lubricating oil and temperature is
directly proportional
equal
inversely proportional
no relation
Ans:->inversely proportional
4.
The relation between the viscosity of
a lubricating oil and pressure is
directly proportional
equal
inversely proportional
no relation
Ans:->directly proportional
5.
The viscosity index of lubricating
oils should be
low
high
equal
medium
Ans:->high
6.
The viscosity index of lubricating
oils can be improved by adding
benzene in the oil
paraffinic components in the oil
nephthenic components in the oil
none of the above
Ans:->paraffinic components in the oil
7.
The viscosity of lubricating oils is
determined by using
Abel’s apparatus
Cleaveland apparatus
Redwood viscometer
Conradson’s apparatus
Ans:->Redwood viscometer
8.
Conradson’s apparatus is used to
determine
Carbon residue
Flash point
viscosity
steam emulsion number
Ans:->Carbon residue
9.
Cleaveland apparatus is used to
determine the flash point of lubricanting oils having it
less than 1750F
00-1550F
greater than 1750F
none of the above
Ans:->greater than 1750F
10. In Cleaveland's Open cup apparatus the mode of heating is
Indirect through water bath
Indirect through air bath
Direct mode of heating
none of the above
Ans:->Direct mode of heating
11. Air bath is used for heating the lubricanting oils in
Penskey Marten's apparatus
Cleaveland apparatus
Redwood viscometer
Abel’s apparatus
Ans:->Penskey Marten's apparatus
12. The dimensions of orifice in Redwood viscometer no 1 are
length -10 mm diameter -3.8 mm
length -10 mm diameter -1.62 mm
length -50 mm diameter -1.62 mm
length -50 mm diameter -3.8 mm
Ans:->length -10 mm diameter -1.62 mm
13. The dimensions of orifice in Redwood viscometer no 2 are
length -10 mm diameter -3.8 mm
length -10 mm diameter -1.62 mm
length -50 mm diameter -1.62 mm
length -50 mm diameter -3.8 mm
Ans:->length -50 mm diameter -3.8 mm
14. Water bath is used for heating the lubricanting oils in
Penskey Marten's apparatus
Cleaveland apparatus
Redwood viscometer
Abel’s closed cup apparatus
Ans:->Abel’s closed cup apparatus
15. Percentage of aromatic compounds in a lubrcating oil is determined
by using
Flash point
aniline point
steam emulsion number
pour point
Ans:->aniline point
16. aniline point of a lubricant should be
low
high
equal
medium
Ans:->high
17. Steam emulsion number of a lubricant should be
low
high
equal
medium
Ans:->low
18. Cloud and Pour point of a lubricant should be
high
equal
low
none of the above
Ans:->low
19. High value of Cloud and Pour point of a lubricant indicates
Higher paraffinic components in the oil
Lower paraffinic components in the oil
Higher nephthenic components in the oil
none of the above
Ans:->Higher paraffinic components in the oil
20. To determine the Cloud and Pour point of a lubricant
round bottomed test tube
flat bottomed test tube
round bottomed flask
none of the above
Ans:->flat bottomed test tube
21. If the titre value is P = 0: which ions presence will cause alkalinity?
a) Only HCO3- Present
b) Only OH- Present
c)
OH- and CO32- Present
d)
HCO3- and CO32- Present
Ans:->a) Only HCO3- Present
22. If the titre value P = M: which
ions presence will cause alkalinity?
a) Only HCO3- Present
b) Only OH- Present
c) OH- and CO32- Present
d) HCO3- and CO32- Present
Ans:->b) Only OH- Present
23. If the titre value P
< .1/2 M: which ions presence will cause alkalinity?
a) Only HCO3-Present
b) Only OH- Present
c)OH- and CO32-Present
d) HCO3- and CO32- Present
Ans:->d) HCO3- and CO32- Present
24. If the titre value P >1/2 M: which ions presence will cause alkalinity?
a) Only HCO3- Present
b) Only OH- Present
c) OH- and CO32- Present
d)HCO3- and CO32- Present
Ans:->c) OH- and CO32- Present
25. If the titre value P
=1/2 M: which ions presence will cause alkalinity?
a) Only HCO3- Present
b) Only CO32- Present
c) OH- and CO32- Present
d) HCO3- and CO32- Present
Ans:->b) Only CO32- Present
26. Why the possibility of OH— and
HCO3— together is ruled out?
a) Because they form CO32—and H2O
b) Because they form H2O
c) Because they form CO2
d) Because they form CO2 and H2O
Ans:->a) Because they form CO32—and H2O
27. What is the relationship between
ppm and mg/l?
a) 1ppm = 1 mg/l
b) 1ppm = 1 00000mg/l
c) 1ppm = 1000 mg/l
d) 1ppm = 100 mg/l
Ans:->a) 1ppm = 1 mg/l
28. In the determination of hardness of water by EDTA method, the
end point is
a) Pink to colourless
b) Blue to wine red
C) Yellow to orange
d) Wine red to blue
d) Wine red to blue
29. 50 ml of a water sample requires 12.7 ml of 0.02m EDTA during
titration. Total hardness of the water is ------------ppm CaCO3 equiv.
A 500
B 524
C 225
D 508
Ans:->D 508
30. 25 ml of a boiled water sample requires 8.5 ml of 0.2 m
disodium EDTA. Permanent hardness of the
water in ppm CaCO3 equiv. is -------
A 68
B 680
C 6800 R
D 6.8
Ans:->C 6800
31. 1M 1 litre EDTA
disodium corresponds to ---------------gm CaCO3
A 1
B 10
C 1000
D 100
Ans:->D 100
32. In the determination of
hardness of water by EDTA method, complex M-EDTA formed is stable at pH
A 4
B 7
C 10
D 13
Ans:->C 10
33. EDTA has _____
reactive sites for co-ordination
A 4
B 6
C 3
D 5
Ans:->B 6
34. Titration of hard water
against EDTA belongs to the ...... type of titration
A Redox
B
Precipitation
C
Neutralization
D
Complexometric
Ans:->D
Complexometric
35. The role of adding
buffer solution of pH 9 to 10 in the titration mixture during titration of hard
water against EDTA is,
A to note
the end point colour
B to neutralize the acidic hard water
sample
C helps the
reaction during titration
D to maintain the
required pH which may change due to formation of acid during titration
reaction
Ans:->D to maintain the
required pH which may change due to formation of acid during titration
reaction
36. Hard water + buffer
(pH10) + indicator(EBT) develops ________colour, before titration against EDTA.
A Orange
B Pink
C Blue
D Wine red
Ans:->B Pink
37. Colour of Metal-EDTA
complex is ____
A Black
B
Colourless
C Blue
D Wine red
Ans:->B
Colourless
38. Hardness of water is
accurately determine by titration against
A standard
AgNO3 solution
B standard
EDTA solution
C standard
KMnO4 solution
D None
Ans:->B standard
EDTA solution
39. Cone penetrometer is used to determine the ------- of the
grease
drop point
pour point
consistency
fire point
Ans:->consistency
40. Tota alkalinity of water is determined by using
phenolphthelein indicator
Methyl orange indicator
both indicators
none of the above
Ans:->both indicators
41. Argentomeric titration is example of
complexometric titrtion
precipitation titration
acid base titration
none of these
Ans:->precipitation titration
42. End point colour of argenomeric titration is
blue to red
green to yellow
black to green
bright yellow to brick red
Ans:->bright yellow to brick red
43. In Argentomeric titration which
indicator is used
potassium chromate
silver nitrate
methyl orange
phenophethalein
Ans:->potassium chromate
44. In Argentomeric titration precipitate is fomed due to
reaction of AgNO3 with Cl
ions
reaction of AgNO3 with Ag
ions
reaction of AgNO3 with
Cr ions
reaction of AgNO3 with Na
ions
Ans:->reaction of AgNO3 with Cl ions
45. Permicible unit of choride ion in water sample
300 ppm
350ppm
250ppm
150ppm
Ans:->250ppm
46. The mode of heating in Cleaveland apparatus is
direct
indirect
both
none
Ans:->direct
47. Carbon residue is also determined by
Abel’s apparatus
Cleaveland apparatus
Ramsbottom apparatus
none
Ans:->Ramsbottom apparatus
48. Value of carbon residue in a lubicant should be
high
low
medium
none of these
Ans:->low
49. consistancy is the property of
oil
gas
grease
fuel
Ans:->grease
50. Drop point is the property of
oil
gas
grease
fuel
Ans:->grease
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