Sawaal
13
Q:

Which of the following reactions are exothermic?

 

1)   C + O2  → CO22)  2Mg + O2  → 2MgO3)  CuSO4 + 5H2O  → CuSO4.5H2O4)  All the above

A) 1 B) 2
C) 3 D) 4

Answer:   D) 4



Explanation:

Here all the given options are Exothermic reactions. Exothermic reactions are those reactions which involves the release of heat.

 

Generally all the combining reactions are exothermic in nature.

Subject: Chemistry
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Analyst , Bank Clerk , Bank PO
Related Questions
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

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

94 19378
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

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

117 19828
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

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

13 8887
Q:

Which of the following is a radioactive element

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

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

29 7634
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

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

6 4150
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

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

34 12944
Q:

In atomic reactors,graphite is used as

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

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

3 3182
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

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

2 2671