1. CCl4 on reaction with super heated steam in presence of iron gives
1) HCl & COCl2 2) HOCl & CH4 3) COCl2 & HCl 4) no reaction
Ans: (3)
Explanation: CCl4 + H2O 
COCl2 + 2 HCl
2. Incorrect statement among the following is
1) Fullerene contain twenty 6 membered & twelve 5 membered rings.
2) 5 membered ring can fuse either with 5 or 6 membered ring.
3) Each Carbon undergoes sp2 hybridization.
4) C - C is 1.43 A° and C = C is 1.38 A°.
Ans: (2)
Explanation: A 5 membered ring can be fused only with 6 membered ring but not with 5 membered ring.
3. Silicate(s) among the following is/ are
1) Asbestos 2) Glass 3) Cement 4) all the above
Ans: (4)
Explanation: All are silicates as they have SiO4-4 units in them.
4. Structure of Silicone is similar to
1) Ketone 2) Alcohol 3) Ether 4) both 1 & 2
Ans: (1)
Explanation: Empirical formula R2SiO (R = CH3 or C6H5 group) is similar to that of Ketone (R2CO).
5. Amorphous form of Silica is
1) Quartz 2) Kieselghur 3) Cristobalite 4) Tridimite
Ans: (2)
Explanation: Only Kieselghur is amorphous form of silica, others are cystalline allotropes.
6. Dry ice is used
1) as refrigerant for ice cream 2) as fire extinguisher
3) in the manufacture of Urea 4) all the above
Ans: (1)
7. The type of rings formed with alternate Si & O atoms in SiO2 is
1) 8 membered 2) 6 membered
3) 4 membered 4) 2 membered
Ans: (1)
Explanation: The entire crystal is considered as giant molecule in which 8 membered rings are formed.
8. Bonds in Silicones are
1) - Si - C - Si - O - Si - 2) - Si - C - Si - C - Si -
3) - Si - O - Si - O - Si - 4) - Si - Si - Si - Si -
Ans: (3)
Explanation: Silicones contain - Si - O - Si - bonds.
9. Match the following.
| Set - I | Set - II |
| A) Quartz | I) drying agent |
| B) Silica gel | II) filtration plants |
| C) Kieselghur | III) accurate clocks |
| D) Silicones | IV) to convert alcohol into gasoline |
| V) water proofing of fabrics |
The correct match is
A B C D A B C D
1) I II III IV 2) III I II V
3) III II I IV 4) IV I II V
Ans: (2)
Explanation: 2 is correct match.
10. Silica reacts with
1) Cl2 & H2 2) HCl & HNO3 3) Na & Mg 4) HF & NaOH
Ans: (4)
Explanation: SiO2 + 2 NaOH → Na2SiO3 + H2O
SiO2 + 4 HF → SiF4 + 2 H2O
11. pH of blood is maintained between ........ by the system H2CO3/ HCO3- is
1) 7.26 to 7.42 2) 7.0 to 7.1 3) 7.1 to 7.2 4) 6.9 to 7.1
Ans: (1)
Explanation: pH is between 7.26 to 7.42.
12. C in CO2 undergoes the type of hybridization
1) sp3 2) sp2 3) sp 4) sp3d
Ans: (3)
Explanation: 
O. 2 σ and 2 Π bonds are observed around an atom is sp hybridization.
13. Methanoic acid on heating with conc. H2SO4 at 373 K gives
1) CO2 & H2 2) CO & H2O 3) CO2 & H2O 4) CO & H2
Ans: (2)
14. Football shaped molecule is
1) Fullerene 2) Graphite 3) Diamond 4) Tridimite
Ans: (1)
Explanation: Fullerene has foot ball shape.
15. 
values of Graphite, Diamond, Fullerene respectively per mole are
1) 1.9 KJ, 0 KJ, 38.1 KJ 2) 0 KJ, 38.1 KJ, 1.9 KJ
3) 0 KJ, 1.9 KJ, 38.1 KJ 4) 1.9 KJ, 38.1 KJ, 0 KJ
Ans: (3)
Explanation: Standared state of Carbon is Graphite, So is zero.
Fullerene is aromatic molecule and is C60.
16. Thermodynamically most stable allotrope of Carbon is
1) Diamond 2) animal Charcoal 3) Fullerene 4) Graphite
Ans: (4)
Explanation: Graphite is thermodynamically most stable.
17. Fullerene was discovered by
1) H.W.Kroto 2) E.Smalley 3) R.F.Curl 4) all the above
Ans: (4)
Explanation: These 3 scientists discovered Fullerenes, were awarded noble prize in 1996.
18. The nature of the oxides GeO2, CO and PbO2 respectively are
1) acidic, neutral, amphoteric 2) basic, neutral, basic
3) amphoteric, acidic, basic 4) acidic, neutral, acidic
Ans: (1)
Explanation: GeO, GeO2, SiO2, CO2_ Acidic.
CO _ neutral.
SnO, PbO, SnO2, PbO2_ amphoteric.
19. The correct order of electronegativity of group 14 elements is
1) C > Si > Ge > Sn > Pb 2) C > Pb > Si = Ge = Sn
3) C > Si < Ge > Sn > Pb 4) C > Si > Ge < Sn < Pb
Ans: (2)
Explanation: E.N. values on Pauling scale are C = 2.5, Pb = 1.9, Si = 1.8, Ge = 1.8, Sn = 1.8.
20. Gaseous products are not formed in the following reaction
1) CH4 + O2 → 2) ZnO + CO →
3) SiO2 + NaOH → 4) Fe2O3 + CO →
Ans: (3)
Explanation: CH4 + 2 O2
CO2 (g) + 2 H2O (g)
ZnO + CO Zn + CO2 (g)
SiO2 + 2 NaOH → Na2SiO3 (l) + H2O (l)
Fe2O3 + 3 CO → 2 Fe + 3 CO2
21. Which of the following is not paramagnetic?
1) CO 2) N2+ 3) O2 4) NO
Ans: (1)
Explanation: Number of valence electrons in CO = 4 + 6 = 10 (even number, so diamagnetic.)
22. Oxidation state of Carbon in its hydrides is
1) -4 2) +4 3) +2 4) 0
Ans: (2)
Explanation: e.g.: CH4
Oxidation state of H = -1 ∴ x + 4(-1) = 0
x - 4 = 0
∴ x = +4
23. CaCO3 + Coke 
Y where Y is
1) C2H6 2) CaC2 3) C2H2 4) C2H4
Ans: (3)
Explanation: CaCO3 + 4 C CaC2 + 3 CO
C2H2 + Ca(OH)2
24. The correct order of 1st ionization enthalpies of group 14 elements is
1) C < Si < Ge < Sn < Pb 2) C > Si > Ge > Sn > Pb
3) C > Si > Ge < Sn > Pb 4) C > Si > Ge > Pb > Sn
Ans: (4)
Explanation: Due to ineffective shielding of valence electrons by the intervening d - and f - electrons. IE1 values of C = 1086, Si = 786, Ge = 761, Pb = 715 and Sn = 708 KJ mole-1.
25. False statement about Zeolite is
1) Some of the SiO4-4 units are replaced by AlO4-5 and AlO6-9 ions in Zeolites.
2) Zeolites are aluminosilicates having three dimentional network.
3) Zeolites are used as cation exchangers.
4) Zeolites have open structure which enables them to take up small molecules.
Ans: (1)
Explanation: In Zeolites SiO4-4 units can be replaced by Na+ or K+ or Ca+2 or Al+3 like cations.
