Chemistry Exam - Question

Q121. Williamson's synthesis is widely used in the laboratory preparation of
(a) alcohols
(b) ethers
(c) aldehydes
(d) esters

Q122. Methanoic and ethanoic acids can be distinguished by the action of
(a) NaHCO₃
(b) NaOH
(c) Tollen's reagent
(d) SOCl₂

Q123. In drinking water supply, which of the following treatments is not involved
(a) Coagulation
(b) Sedimentation
(c) Softening
(d) Disinfection

Q124. One name that is not a nuclear activity unit
(a) Bequerel
(b) Openheimer
(c) Rutherford
(d) Curie

Q125. Two moles of an ideal gas expand freely into vacuum. The work done by the gas is
(a) 2J
(b) 4J
(c) infinity
(d) 0

Q126. The scientist who experimentally proved the existance of positron is
(a) Fermi
(b) Anderson
(c) Bohr
(d) Bethe

Q127. Who proposed law of octaves while arranging the elements in the periodic table
(a) Lavoisier
(b) Mendeleev
(c) Lothar Meyer
(d) J.A.R. Newlands

Q128. SiO₂ is
(a) an acidic oxide
(b) a basic oxide
(c) a neutral oxide
(d) an amphoteric oxide

Q129. The ratio of specific heat for poly atomic molecular is
(a) 1.33
(b) 1.667
(c) 1.40
(d) 1.67

Q130. The Boyle temperature of N₂ is
(a) 340 K
(b) 220 K
(c) 332 K
(d) 310 K

Q131. When HCl gas is passed through a saturated solution of NaCl, the solubility of NaCl
(a) will increase
(b) will remain the same
(c) will decrease
(d) will become zero

Q132. How many chiral centre in Tartaric acid
(a) 1
(b) 2
(c) 3
(d) 0

Q133. The least symmetric crystal system is
(a) monoclinic
(b) cubic
(c) tetrahedron
(d) triclinic

Q134. Ionisation energy is always
(a) an exothermic process
(b) a spontaneous process
(c) a reversible process
(d) an endothermic process

Q135. How many chiral carbon atoms are present in fructose
(a) 1
(b) 2
(c) 3
(d) 4

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