When Benzene diazonium chloride is treated with cuprous chloride in HCl, Chlorobenzene is formed, This reaction is known as –
a) Etard Reaction
b) Perkin’s Reaction
c) Gattermann’s Reaction
d) Sand Meyer’s Reaction
a) Etard Reaction
b) Perkin’s Reaction
c) Gattermann’s Reaction
d) Sand Meyer’s Reaction
d) Sand Meyer’s Reaction
The reaction \({\\(CH_3\\)}_2\)CHCl + NaI → \({(\\CH_3\\)}_2\)CHI + NaCl is known as –
a) Finkelstein’s reaction.
b) Stephen’s reaction.
c) Kolbe’s reaction.
d) Wurtz reaction.
The reaction R-Br + NaCN → R – CN + NaBr is an example of –
(a) Elimination Reaction.
(b) Nucleophilic Substitution.
(c) Electrophilic Substitution.
(d) Oxidation Reduction.
Benzene reacts with \(CH_3\)Cl in the presence of anhydrous \(AlCl_3\) to form:
(a) chlorobenzene
(b) benzylchloride
(c) xylene
(d) toluene
A Grignard reagent may be made by reacting magnesium with
a) Methyl amine.
b) Diethyl ether.
c) Ethyl iodide.
d) Ethyl alcohol.
Write the structure of an isomer of compound C₄H₉Br which is most reactive towards reaction.
The Addition of HBr to 2—Pentene gives –
a) 2-Bromopentane only.
b) 3-Bromopentane only.
c) 2-Bromopentane and 3-Bromopentane.
d) 1-Bromopentane and 3-Bromopentane.
Which of the following is an example of vic-dihalide?
(a) Dichloromethane.
(b) 1,2-dichloroethane.
(c) Ethylidene chloride.
(d) Allyl chloride.
One mole of ethyl acetate on treatment with an excess of \(LiAlH_4\) in dry ether and subsequent acidification produces
(a) 1 mole acetic acid + 1 mole ethyl alcohol.
(b) 1 mole ethyl alcohol + 1 mole methyl alcohol.
(c) 2 moles of ethyl alcohol.
(d) 1 mole of 2-butanol.
Why is Helium used in divers' tank but not hydrogen gas?
a) Helium is lighter than hydrogen.
b) Helium is inert to any chemical reactions.
c) Helium is cheaper.
d) Helium is easy to get from market.
Which of the following statements is not true about the hexagonal close packing?
(A) The coordination number is 12.
(B) It has 74% packing efficiency.
(C) Tetrahedral voids of the second layer are covered by the spheres of the third layer.
(D) In this arrangement spheres of the fourth layer are exactly aligned with those of the first layer.
There is a considerable increase in covalent radius from N to P. However, from As to Bi only a small increase in covalent radius is observed. This is due to
a) Increase in number of shells
b) increase in valence electrons
c) increase in ionisation enthalpy
d) the presence of completely filled d and/or f orbitals
When Xe reacts with Fluorine in 1:5 ratio at 873 K it forms
a) \(XeF_2\)
b) \(XeF_4\)
c) \(XeF_6\)
d) \(XeOF_4\)
Benzene reacts with \(CH_3\)Cl in the presence of anhydrous \(AlCl_3\) to form:
(a) chlorobenzene
(b) benzylchloride
(c) xylene
(d) toluene
Which of the following Defects is also known as dislocation defect?
(A) Frenkel defect
(B) Schottky defect
(C) Non-stoichiometric defect
(D) Simple interstitial defect