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1. The suitable indicator for the titration of weak acid and strong base should have a pH range between :
2. An alkene ‘A’ on ozonolysis gives a mixture of ethanal and pentane-3-one. The alkene ‘A’ is
In the above reaction compound C isa) CH3–COOH, CH3–NH2and CH3–NCb) CH3–CO–NH2, CH3–NH2and CH3–CNc) CH3–CO–NH2, CH3–NH2and CH3–NCd) CH3–CH2–NH2, CH3–NH2and CH3–NCDeselect Answer
13. Which of the following compound act as a poison in Lindlar catalyst ?(a) Sulphur compound(b) Quinoline (c) Both(d) NoneDeselect Answer
14. IUPAC name of aspirin is :a) 2-Ethanoyloxy benzoic acid b) Acetyl salicylic acid c) Aspirin d) 2-methoxy carboxyl benzoic acidDeselect Answer
15. Which of the following nitrogen containing compound does not give Lassaigne’s test ?(a) Phenyl hydrazine (b) Glycine (c) Urea (d) HydrazineDeselect Answer
16. Choose the correct order of atomic size ?a) Sn > Ce > Lu > Yb b) Lu > Yb > La > Lr c) Ce > Pm > Yb > Lu d) Lu > Yb > Ce > LaDeselect Answer
18. Identify the one which reduced Tollen’s reagent ?(a) Starch (b) Cellulose (c) Maltose(d) SucroseDeselect Answer
19. The correct Lewis acid order for boron halide isa) BF3 >BCl3 > BBr3 > BI3b) BF3 < BCl3 < BBr3 < BI3c) BF3 > BI3 > BBr3 > BCl3d) BF3 >BCl3 > BBr3 > BI3Deselect Answer
20. Catalyst used in contact process is is
(a) Fe2O3(b) V2O5(c) Cr2O3 (d) CrO3