ECAT CHEMISTRY 2005
1. In chromatography the rates of solute is determined by the .........
(ANS : Distribution Law )
2. Graham’s gas law is concerned with ………….
(ANS : Gaseous diffusion)
3. The standard temperature and pressure conditions are ………….
(ANS : 0o and 760 mm Hg )
4. Spreading of a scent of rose is due to process of …………..
(ANS : diffusion )
5. The common crystal type of carbon is ……………..
(ANS : Cubic hexagonal )
6. Lowest possible principal quantum number is …………..
(ANS : 1 )
7. Which one of following is non-polar molecule …………. (CH4, BF3, CHCl3, H2O)
(ANS : CH4 )
8. ∆H is always negative for ……………… reactions.
(ANS : Exothermic )
9. Dust particles in air are example of a mixture of type ………………
(ANS : solid in gas )
10. The difference of BP’s of substances of a mixture is utilized in the separation technique of ……………
(ANS : Fractional distillation )
11. The solubility depends on …………..
(ANS :Nature of solute,solvent and temperature )
12. Which one of following belong to group IV-A ( Pb, Sb, Ba, Fe)
(ANS : Pb )
13. Formula of pure clay is …………….
(ANS : K2O.Al2O3.6SiO2)
14. The highest ionization energy in 5th group is of ………….
(ANS : Nitrogen )
15. The catalyst used to convert SO2 to SO3 is ………………….
(ANS : V2O5 )
16. When gypsum loses ¾ of water then the hemihydrate formed has formula ………….
( ANS : CaSO4 . 1/2H2O )
17. Down cell is used to prepare…………
(ANS : Sodium metal )
18. Aqua regia consists of ………..
(ANS : HNO3 & HCl )
19. H2P2O7 is the formula of …………..
(ANS : Pyrophosphoric acid )
20. Bleaching powder is made by passing chlorine over …………
(ANS : Calcium hydroxide )
21. In transition elements color formation is due to …………..
(ANS : d-d transition )
22. The formula of tetramminedichlorodinitroplatinum(IV)sulphate is ……….. ( ANS : [ Pt Cl ( NO2 )( NH3 )4 ]SO4 )
23. Production of vegetable ghee involves ………….
(ANS : Hydrogenation )
24. CH2 -- COOH == NH2 is the formula of ………….
(ANS : Glycine(amino acid) )
25. Phosphorus is important in the development of …………
(ANS : Seed )
26. Which of these is not a nucleophile …………… (H2O, BF3, SO2)
(ANS : BF3 )
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