3
Q:

Which of the following group is NOT Dobereiner Triads?

 

A) Li, Na, K B) N, P Au
C) Cl, Br, I D) Ca, Sr, Ba

Answer:   B) N, P Au



Explanation:
Subject: Chemistry
Exam Prep: Bank Exams
Q:

Cobalt - 60 is commonly used in radiation therapy because it emits

A) alpha - rays B) beta rays
C) gamma rays D) X - rays
 
Answer & Explanation Answer: C) gamma rays

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Filed Under: Chemistry

94 19355
Q:

' Yellow cake ' an item of smuggling across border s

A) A crude form of heroin B) A crude form of cocaine
C) Uranium oxide D) Unrefined gold
 
Answer & Explanation Answer: C) Uranium oxide

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Filed Under: Chemistry

117 19807
Q:

Which one of the following can be used to confirm wether drinking water contains a gamma emitting isotope or not

A) Microscope B) Scintillation counter
C) Lead plate D) pectrophotometer
 
Answer & Explanation Answer: B) Scintillation counter

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Filed Under: Chemistry

13 8855
Q:

Which of the following is a radioactive element

A) Sulphur B) Polonium
C) Tellurium D) Selenium
 
Answer & Explanation Answer: B) Polonium

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Filed Under: Chemistry

29 7612
Q:

Artificial radioactivity elements are present in

A) s - block B) p - block
C) d - block D) f - block
 
Answer & Explanation Answer: D) f - block

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Filed Under: Chemistry

6 4140
Q:

In nuclear reactor,Chain reaction is controlled by introducing

A) cadmium rod B) iron rod
C) platinum rod D) graphite rod
 
Answer & Explanation Answer: A) cadmium rod

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Filed Under: Chemistry

34 12926
Q:

In atomic reactors,graphite is used as

A) lubricant B) fuel
C) linear of the ractor D) moderator
 
Answer & Explanation Answer: D) moderator

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Filed Under: Chemistry

3 3162
Q:

Energy produced in nuclear reaction is given by

A) Charle's law B) Grahm's law
C) Gay - Lussac's law D) Einstein's law
 
Answer & Explanation Answer: D) Einstein's law

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Filed Under: Chemistry

2 2665