Unit16 Group14 qns

Unit16 Group14 qns - 1 UNIT 16 Group 14 or IVA 1....

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1 QUEST TUTORIALS Head Office : E-16/289, Sector-8, Rohini, New Delhi, Ph. 65395439 UNIT 16 Group 14 or IVA 1. Catenation is the ability of (a) atoms to form strong bonds with similar atoms (b) elements to form gaint molecules (c) an element to form multiple bonds (d) an element to form long chains of identical atoms 2. The inert pair effect is most prevalent in compounds of which IV group element ? (a) C (b) Si (c) Ge (d) Sn 3. The group IV element oxide exhibiting the strongest basic properties is (a) SiO 2 (b) PbO 2 (c) SnO 2 (d) PbO 4. Which tetachloride is not hydrolysed by water ? (a) Cl 4 (b) SiCl 4 (c) SnCl 4 (d) PbCl 4 5. Pb Cl 2 dissolves most apreciably in (a) water (b) dil. NaOH (c) Conc. NaOH (d) Conc. Hcl 6. The best reaction to give Sn Cl 4 is (a) SnO + Conc. HCl (b) Sn + Conc. HCl (c) Sn + dry HCl (d) Sn + dry HCl 7. Given the bond enthalpies in KJ mole –1 C–C +3448. Si–Si +176 Ge–Ge +168. Sn–Sn +155/ Its clear that (a) C can catenate best (b) Si Catenate to a small content (c) Ge an Sn do not catenate (d) all the above 8. Which of the following statement about IV group elements (C to Pb) is not correct? (a) The thermal stability of hydrides decreases from Ch 4 to PbH 4 as bond enthalpy for M–H bond decrease (b) all form tetra fluorides, tetra chlorides, tetra bromides (c) only Sn and Pb form dichlorides (d) all form tetra iodides 9. SiF 4 dissolves in Conc. HF to form (a) H 4 SiF 6 (b) [SiFe 6 ] –2 ion (c) SiO 2 .xH 2 O (d) SiF 6 10. The most commonly used reducing agent to reduce Fe 3+ to Fe 2+ , Hg 2+ to Hg + , I 2 to I is (a) SnCl 2 (b) Na 2 SnO 2 (c) PbCl 2 (d) Na 2 PbO 2 11. An effective redicing agent and industrial fuel is (a) CO 2 (b) CO (c) CH 4 (d) C 2 H 5 OH 12. What is not correctabout carbon monoxide, CO? (a) Carbon is CO is Sp hybridised and is linear molecule (b) CO is a ligand because it has a lone pair of electrons on the carbon atom (c) CO is the reducing agent in metallurgy of iron (d) Co has the structure C O 13. Carbon monoxide can be estimated by (a) reaction of Cl 2 forming COCl 2 (b) reaction with I 2 O 5 and estimating liberated I 2 (c) reaction with NaOH and estimating molarity of HCOONa (d) reaction with Ni at 60ºC 14. Which is not correct about CO 2 ? (a) C in CO 2 is Sp hybridised and its is a linear molecule (b) Solid CO 2 is a molecular solid (c) CO 2 is a leavening agent (d) CO 2 is an important ligand
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2 QUEST TUTORIALS Head Office : E-16/289, Sector-8, Rohini, New Delhi, Ph. 65395439 15. Which is not true about SiO 2 (a) it is a net work solid (b) it is attacked by molten NaOH (c) it is attacked by HF (d) it is the basic structural unit of silicates
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Unit16 Group14 qns - 1 UNIT 16 Group 14 or IVA 1....

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