ln electrophillic aromatic substitution reaction, the nitro group is meta directing because it decreases electron density at meta position

244.    ln electrophillic aromatic substitution reaction, the nitro group is meta directing because it

(A) increases electron density at meta position

(B) increases electron density at ortho and para positions

(C) decreases electron density at ortho and para positions

(D) decreases electron density at meta position

Answer:: (C)

245.    ln the electrolysis of acidulated water, it is desired to obtain 1.12 cc of Hydrogen per second under S.T.P. condition. The current to be passed is

(A) 19.3 Amp

(B) 0.965 Amp

(C) 1.93 Amp

(D) 9.65 Amp

Answer:: (D)

246.    Lucas test is associated with

(A) Carboxylic acid

(B) Alcohols

(C) Aldehydes

(D) Phenols

Answer:: (B)

247.    Malleability and ductility of` metals can be accounted due to

(A) the presence of electrostatic force

(B) the crystalline structure in metal

(C) the capacity of` layers of metal ions to slide over the other

(D) the interaction of` electrons with metal ions in the lattice

Answer:: (C)

248.    Mass of 0.1 mole of Methane is

(A) 1 g

(B) 16 g

(C) 1.6 g

(D) 0.1 g

Answer:: (C)

249.    Maximum number of molecules of CH3I that can react with a molecule of CH3NH2 are

(A) 1

(B) 2

(C) 4

(D) 3

Answer:: (D)

250.    Mercury is a liquid metal because

(A) it has a completely filled s-orbital

(B) it has a small atomic size

(C) it has a completely filled d-orbital that prevents d-d overlapping of orbitals

(D) it has a completely filled d-orbital that causes d-d overlapping

Answer:: (C)