240.Ruddles'solution contains

a.5%NaOCl&H2o2
b.5%NaOCl,Ca(oH)2& 17%EDTA
c.5%NaOCl,Hypaque& 17%EDTA
d.17%EDTA,Urea peroxide&Propylene glycol

Ans-c.5%NaOCl,Hypaque& 17%EDTA

239.All are true for home bleaching,except

a.Uses 15%carbamide peroxide
b.In addition to bleaching agent carbapol is used
c.Vacuum from vinyl trays are used
d.Both arches bleached simultaneously


Ans-d.Both arches bleached simultaneously

Explanation-sturdvent 4th ed pg 610-612
It is recommended that only one arch be bleached at a time, beginning with maxillary arch.bleaching the maxillary arch first allows theuntreated mandibular arch to serve as a comparison.

238.Which one of the following anaesthetic agents causes a rise in the intracranial pressure?

a.Sevoflurane
b.Thiopentone sodium
c.Lignocaine
d.Propofol

Ans-a.Sevoflorane

Explanation-Intracranial pressure increases at high inspired concentrations of Sevoflorane.Ref Aitkinhead 4th/159