Excess of copper in toxic proportions in plants/animals can be removed by chelating with

• EDTA

• ethane-1,2-diamine

• oxalate ion

• D-pencillamine

552.

Which will undergo S_N2 reaction fastest among the following halogen compounds?

• CH₃CH₂F

• CH₃CH₂Cl

• CH₃CH₂Br

• CH₃CH₂I

The alkyl halide that undergoes S_N1 reaction more readily is

• t-butyl bromide

• n-propyl bromide

• vinyl bromide

• isopropyl bromide

An alkyl halide (R X) reacts with Na to form 4, 5-diethyloctane. Compound R X is

• CH₃(CH₂)₃Br

• CH₃(CH₂)₂CH(Br)CH₂CH₃

• CH₃(CH₂)₃CH(Br)CH₃

• CH₃(CH₂)₅Br

Which of the following is a double base propellant ?

• Methyl nitrate and nitromethane

• Nitroglycerine and nitrocellulose

• Kerosine and alcohol

• Acrylic rubber and liquid N2O4

Which one of the following compounds is capable of existing in a mesa form?

• 2,4-dibromopentane

• 3,3-dibromopentane

• 4-bromo-2-pentanol

• 3-bromo-2-pentanol

Which of the following is not true of carbanions?

• The carbon carrying the charge has eight valence electrons

• They are formed by heterolytic fission

• They are paramagnetic

• The carbon carrying the charge is sp³ hybridised

The S_N1 reactivity of the following halides will be in the order

(i) (CH₃)₃CBr

(ii) (C₆H₅)₂CHBr

(iii) (C₆H₅)₂C(CH₃)Br

(iv) (CH₃)₂CHBr

(v) C₂H₅Br

• (iii) > (ii) > (i) > (iv) > (v)

• (v) > (iv) > (i) > (ii) > (iii)

• (ii) > (i) > (iii) > (v) > (iv)

• (v) > (i) > (ii) > (iv) > (iii)

Which of the following does not answer iodoform test?

• n-butyl alcohol

• sec-butyl alcohol

• Acetophenone

• Acetaldehyde

Aniline on treatment with NaNO₂ in HCl at 0°C followed by treatment with alkaline β-naphthol gives:

• a violet solution

• a red solution

• a green solution

• a blue precipitate