Oil used as frothing agent in froth-floatation process is from C

Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

51.

Which of the following reagents cannot be used for the given conversion?

  • Sn-HCl

  • Fe-HCl

  • LiAlH4

  • Pd/C


52.

The reaction,

C6H5ONa + CO2 +H2C6H5OH + NaHCO3 suggests that

  • phenol is a stronger acid than carbonic acid

  • carbonic acid is a stronger acid than phenol

  • water is a stronger acid than phenol

  • None of these.


53.

Which is not classified as thermoplastics?

  • Polyethylene

  • Polystyrene

  • Bakelite

  • Neoprene


54.

Which one of the following does not give white precipitate with acidified silver nitrate solution?

  • CH2 = CH - Cl

  • CH2 = CH - CH2 - Cl

  • Both (a) and (b)


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55.

Oil used as frothing agent in froth-floatation process is

  • pine oil

  • mustard oil

  • coconut oil

  • olive oil


A.

pine oil

Pine oil is the oil which is used as a frothing agent in froth floatation .


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56.

Which amine amongst the following will answer positively the carbylamine test?

  • C6H5 - NH - CH3

  • C6H5 - NH - C4H9

  • C6H5 - N(C2H5)2


57.

Arsenic drugs are mainly used in the treatment of

  • Jaundice

  • Typhoid

  • Syphilis

  • Cholera


58.

Glucose HCN Hydrolysis HI, heat A,

A is

  • heptanoic acid

  • 2-iodohexane

  • heptane

  • heptanol


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59.

Assertion : Phenol is more acidic than ethanol.

Reason : Phenoxide ion is resonance stabilised.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false.


60.

Assertion : 2-Methyl-1, 3-butadiene is the monomer of natural rubber.

Reason : Natural rubber is formed through anionic addition polymerisation. 

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false.


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