Q.1
Which of the following oxides is most acidic in nature?
  • BaO
  • BeO
  • CaO
  • MgO
Q.2
The compound A on treatment with Na gives B, and with \(\text{PC}1_5\) gives C. B and C react together to give diethyl ether. A, B and C are in the order
  • \( C_2H_5OH,C_2H_5C\text{1,}C_2H_5ONa\)
  • \( C_2H_5OH,C_2H_6,C_2H_5C1\)
  • \( C_2H_5OH,C_2H_5ONa,C_2H_5C1\)
  • \( C_2H_5C\text{1,}C_2H_5OH\)
Q.3
In the structure of \(ClF_3\), the number of lone pairs of electrons on central atom ‘Cl’ is
  • two
  • four
  • one
  • three
Q.4
For the redox reaction \[MnO_{4}^{-}+C_2O_{4}^{2-}+H^+\rightarrow Mn^{2+}+CO_2+H_2O\] The correct coefficients of the reactants for the balanced equation are
  • \(MnO_{4}^{-}--\text{16 }C_2O_{4}^{2-}--\text{5 }H^+--2\)
  • \(MnO_{4}^{-}--\text{5 }C_2O_{4}^{2-}--\text{16 }H^+--2\)
  • \(MnO_{4}^{-}--\text{2 }C_2O_{4}^{2-}--\text{5 }H^+--16\)
  • \(MnO_{4}^{-}--\text{2 }C_2O_{4}^{2-}--\text{16 }H^+--5\)
Q.5
Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity?
  • \( NO_2\)
  • \( N_2O\)
  • \( NO\)
  • \( N_2O_5\)
Q.6
Regarding cross-linked or network polymers, which of the following statements is incorrect?
  • They contain strong covalent bonds in their polymer chains.
  • They contain covalent bonds between various linear polymer chains
  • Examples are Bakelite and melamine.
  • They are formed from bi-and tri-functional monomers.
Q.7
Consider the following species : \(CN^+\), \(CN^-\), \(NO\) and \(CN\) Which one of these will have the highest bond order?
  • \(CN^+\)
  • \(CN\)
  • \(NO \)
  • \(CN^-\)
Q.8
A mixture of 2.3g formic acid and 4.5g oxalic acid is treated with conc. \(H_2SO_4\). The evolved gaseous mixture is passed through \(KOH\) pellets. Weight (in g) of the remaining product at STP will be
  • 1.4
  • 3.0
  • 4.4
  • 2.8
Q.9
The difference between amylase and amylopectin is
  • Amylose is made up of glucose and galactose
  • Amylopectin have 1 → 4 α–linkage and 1 → 6 β–linkage
  • Amylopectin have 1 → 4 α–linkage and 1 → 6 β–linkage
  • Amylose have 1 → 4 α–linkage and 1 → 6 β–linkage
Q.10
Which one of the following elements is unable to form \(MF_{6}^{3-}\) ion?
  • B
  • In
  • Al
  • Ga
Q.11
Which of the following compounds can form a zwitterion?
  • Acetanilide
  • Glycine
  • Benzoic acid
  • Aniline
Q.12
Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of (X) is \(1s^2\,\,2s^2\,\,2p^2\) the simplest formula for this compound is
  • \(MgX_2\)
  • \(Mg_2X\)
  • \(Mg_3X_2\)
  • \(Mg_2X_3\)
Q.13
Iron exhibits bcc structure at room temperature. Above \(900^0\text{C,}\) it transforms to fcc structure. The ratio of density of iron at room temperature to that at \(900^0\text{C,}\) (assuming molar mass and atomic radii of iron remains constant with temperature) is
  • \( \frac{3\sqrt{3}}{4\sqrt{2}}\)
  • \( \frac{4\sqrt{3}}{3\sqrt{2}}\)
  • \( \frac{1}{2}\)
  • \( \frac{\sqrt{3}}{\sqrt{2}}\)
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