Test - 2 Single Choice Questions
Test - 2 Single Choice Questions
Test - 2 Single Choice Questions
2. Which of the following compound does not produce green coloured product on thermal
decomposition.
(A) K2Cr2O7 (B) KMnO4
(C) (NH4)2Cr2O7 (*D) NH4NO3
11. Statement-1 : Compound of alkaline earth metals are more extensively hydrated than
those of alkali metals.
Statement-2 : The hydration enthalpies of alkaline earth metal ions are larger than those
of alkali metal ions.
(*A) Statement-1 is true, Statement-2 is true and Statement-2 is correct explanation for
Statement-1
(B) Statement-1 is true, Statement-2 is true and Statement-2 is NOTcorrect explanation
for Statement-1
(C) Statement-1 is true, Statement-2 is false
(D) Statement-1 is false, Statement-2 is true
12. Crown ethers and cryptands form
(*A) complexes with alkali metals
(B) salts of alkali metals
(C) hydroxides of alkali metals used for inorganic quantitative analysis
(D) organic salts of alkali metals
16. A chemical A is used for the preparation of washing soda to recover ammonia. When CO2
is bubbled through an aqueous solution of A, the solution turns milky. It is used in white
washing due to disinfectant nature. What is the chemical formula of A ?
(A) Ca (HCO3)2 (B) CaO
(*C) Ca(OH)2 (D) CaCO3
17. The compounds formed upon cambustion of Na-metal in excess dry air is/are
(*A) Na2O2 (B) Na2O
(C) NaO2 (D) NaOH
19. In which of the following silicates, only two corners per tetrahedron are shared :
(i) Pyrosilicate (ii) Cyclic silicate
(iii) Double chain silicate (iv) Single chain silicate
(v) 3 D silicate (vi) Sheet silicate
(A) (i), (ii) and (v) (B) (iv) and (vi) only
(C) (i) and (vi) only (D*) (ii) and (iv) only
20. In which of the following structure, the number of shared O-atom per tetrahedron is two
and half.
(A) Pyroxene chain silicate
(*B) Amphibole chain silicate
(C) Cyclic silicate
(D) Sheet silicate
23. The stability of dihalides of Si, Ge, Sn and Pb increases in the sequence
(A) GeX2 < SIX < SnX2 < PbX2 (B) SiX2 < GeX2 < PbX2 < SnX2
(C*) SiX2 < GeX2 < SnX2 < PbX2 (D) PbX2 < SnX2 < GeX2 < SiX2
24. Polarization of an anion is distortion of its electron cloud by an adjacent placed cation.
Which of the following statement is correct.
(A) Minimum polarization is brought about by a cation of low radius.
(B) A large cation is likely to bring about a large degree of polarization.
(*C) Maximum polarization is brought about by a cation of high charge
(D) A small anion is likely to undergoes large degree of polarization
25. Which of the following salt does not give NO2 gas on heating ?
(A) Pb(NO3)2 (B) Zn(NO3)2
(C) AgNO3 (*D) KNO3
26. Which of the following compound can not be thermally decomposed even at high
temperature.
(A) CsHCO3 (*B) Rb2CO3
(C) Li2CO3 (D) (NH4)2CO3
27. Correct code for following thermal decomposition reaction(s) evolving gas having equal
number of and bonds is
(I) BeCO3 (II) ZnSO4
T 800 C
300 C
(III) FeSO4 (IV) (NH4)2Cr2O7
(A) I, II (B) I, Ill, IV
(*C) I, II, III (D) All
30. Statement-1 : PbI4 doesn't exist and converts into PbI2 and I2 spontaneously at room
temperature but PbCl4 needs heating to convert into PbCl2 and Cl2.
Statement-2 : Pb2+ is more stable than Pb4+ due to inert pair effect.
(A) Statement-1 is true, statement-2 is true and statement-2 is correct explanation for
statement-1.
(*B) Statement-1 is true, statement-2 is true and statement-2 is NOT the correct explanation
for statement-1.
(C) Statement-1 is true, statement-2 is false.
(D) Statement-1 is false, statement-2 is true.
Comprehension (31 to 33)
According to inert pair effect the lower oxidation state becomes more stable on descending
the group. The effect is commonly ascribed to the stability of an electron configuration with
entirely filled subshells in the inert pair effect, a metal loses all the p electrons in its outer
most subshell, leaving a filled s2 subshell, the pair of s-electrons seems relatively "inert"
and is less easily removed.
32. Which of the following element does not follow phenomenon of Inert-Pair effect
(*A) Sn (B) Pb
(C) Tl (D) Bi
W P Q R
(A) CaO SO3 CaCl2 Ca(HSO4)2
(B) CaO SO2 CaCl2 CaSO4
(*C) CaO CO2 CaCl2 CaSO4
(D) Ca(OH)2 CO2 CaCl2 Ca(HSO4)2
1
(*A) CaSO4 H O is "plaster of paris"
2 2
(*B) Formation of Na2CO3 is done by "Solvay process".
(*C) CaSO4. 2H2O is 'Gypsum"
3
(D) CaSO4 H O is "plaster of paris".
2 2
45. Which of the following substance(s) is/are used in laboratory for drying purposes?
(*A) anhydrous P2O5 (B) graphite
(*C) anhydrous CaCl2 (D) Na3PO4
48. Several sodium compounds find use in industries. Which of the following compounds are
used for textile industry ?
(*A) Na2CO3 (B) NaHCO3
(*C) NaOH (D) NaCI
49. When Zeolite, which is hydrated sodium aluminium silicate is treated with hard water, the
sodium ions are exchanged with which of the following ion(s) ?
(A) H+ ions (*B) Mg2+ ions
(*C) Ca2+ ions (D) SO42– ions
59. In IF6– and TeF5– , sum of axial d-orbitals which are used in hybridisation in both species
Ans. 4
and calculate value of Y X, (Where X is the total number of compounds which have
H – Ĉ – H bond angles equal to 109°28' and Y is the total number of compounds which
have H – Ĉ – H bond angles greater than 109°28' and less than 120°)
Ans. 6
65. Number of hybrid orbital of C atoms which have 33% s character in C(CN)4
Ans. 0