121) The organic acid present in vinegar is

Methanoic acid

Ethanoic acid

Propanoic acid

None of these

Answer is:

Ethanoic acid

Explanation:

Vinegar contains acetic acid. Acetic acid is also called ethanoic acid. Since acetic acid is the primary component present, the chemical formula of vinegar is the same.

RRB JE Mechanical Question Paper 2014 (Set-2) with Answers

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122) For a Broad gauge route with M+7 sleeper density, the number of sleepers per rail length is

Answer is:

20

Explanation:

Sleeper density = M+x
where M= Rail length
For broad gauge Rail length is equal to 12.8 approximately equal to 13m
M +7= 13+7=20

123) A body of mass 20 kg is dropped from a height of 2 m. If g is taken as 10 m/ square second, the kinetic energy of the body, just before striking the ground, will be

400 J

4 J

40 J

10 J

Answer is:

400 J

124) An accurate ammeter must have a resistance of

High value

Low value

Very low value

Very high value

Answer is:

Very low value

125) A shopkeeper says he sells his goods at cost price, but he uses weight of 800 gms instead of 1 kg. Thus he makes a gain of

10%

15%

20%

25%

Answer is:

25%

RRB JE Mechanical Question Paper 2014 (Set-2) with Answers

For more MCQ's Click Here

121) The organic acid present in vinegar is

Ethanoic acid

RRB JE Mechanical Question Paper 2014 (Set-2) with Answers

Related RRB JE Mechanical Question Paper 2014 (Set-2) with Answers

122) For a Broad gauge route with M+7 sleeper density, the number of sleepers per rail length is

20

123) A body of mass 20 kg is dropped from a height of 2 m. If g is taken as 10 m/ square second, the kinetic energy of the body, just before striking the ground, will be

400 J

124) An accurate ammeter must have a resistance of

Very low value

125) A shopkeeper says he sells his goods at cost price, but he uses weight of 800 gms instead of 1 kg. Thus he makes a gain of

25%

RRB JE Mechanical Question Paper 2014 (Set-2) with Answers