Related Questions

প্রথম ক্রম বিক্রিয়ার অর্ধায়ু t12 এর মান -
A 0.963 K
B 0.963 /K
C 0.693 K
D 0.693 /K
একটি দ্বিতীয় ক্রম বিক্রিয়ার অর্ধায়ুকাল (t12)   এবং বিক্রয়কের ঘনমাত্রা (C) এর মধ্যকার সম্পর্কটি হল-
A    t12=  ধ্রুব
B      t12∞C2
C    t12=1/C2   
D   t12∞1/C
একটি তেজস্ক্রিয় মৌলের ক্ষয় ধ্রুবক 0.02 yr-1 হলে- (i) T12 = 34.6yr (ii) τ = 50yr (iii) মৌলটির 14 অংশ অবশিষ্ট থাকবে 69.2 বছর পর নিচের কোনটি সঠিক?
A i ও ii
B i ও iii
C ii ও iii
D i, ii ও iii
Plasma half life t1/2 of a drug determines its
A Dose
B Dosing frequencies
C Plasma steady state concentration achievement
D Clearance
E Metabolism
Plasma half life of a drug gives information about its
A Dose requirement
B Duration of action
C Frequency of administration
D Absorption
E Toxic effects
A man sells chocolates which are in the boxes. Only either full box or half a box of chocolates can be purchased from him. A customer comes and buys half the number of boxes which the seller had plus half box more. A second customer comes and purchases half the remaining number of boxes plus half a box. After this the seller is left with no chocolate boxes. How many chocolate boxes the seller had initially?
A 2
B 3
C 4
D 3.5
E None of these
A drug that is highly effective in treating many types of infection can,at present,be obtained only from the bark of the ibora , a tree that is quite rare in the wild. It takes the bark of 5000 trees to make one kilogram of the drug. It follows, therefore, that continued production of the drug must inevitably lead to the ibore's extinction. Which of the following,if true, most seriously weakens the arguments above ?
A The drug made from the ibora bark is dispensed to doctors from a central authority
B The drug made from the ibora bark is expensive to produce
C The leaves of the ibora are used in a number of medical products
D The ibora can be propagated from cuttings and grown under cultivation
Plasma half-life of drugs gives idea about:
A Duration of drug action
B Dose of the drug
C Dose interval
D Mechanism of drug action
E Potency of drugs
The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then
A $${\frac{3}{4}^{{\text{th}}}}$$ of it will disintegrate in two months
B It will completely disintegrate in two months
C It will completely disintegrate in four months
D $${\frac{l}{8}^{{\text{th}}}}$$ of it will remain intact at the end of four months
The preferable dosing interval of a drug with an elimination half life of 6 hours could be
A 11 hours
B 3 hours
C 5 hours
D 7 hours
E 9 hours

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