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:

Which one is the pure element

A) glass B) cement
C) sodium D) None of these
 
Answer & Explanation Answer: C) sodium

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

82 12517
Q:

Air is 

A) compound B) element
C) mixture D) solution
 
Answer & Explanation Answer: C) mixture

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

3 3501
Q:

Milk is a 

A) mixture B) element
C) metal D) None of these
 
Answer & Explanation Answer: A) mixture

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

5 3821
Q:

Which one is not metal

A) sulpher B) sugar
C) nitogen D) all of these
 
Answer & Explanation Answer: D) all of these

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

84 14836
Q:

Antimony is

A) metal B) non metal
C) non metaloid D) metalloid
 
Answer & Explanation Answer: D) metalloid

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

3 3759
Q:

The substances that are composed of to or more different elements in fixed proportion by mass are called

A) mixture B) compound
C) element D) None of these
 
Answer & Explanation Answer: B) compound

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

5 4832
Q:

The law of constant proportions was enunciated by

A) Dalton B) Berthelot
C) Avogadro D) Proust
 
Answer & Explanation Answer: D) Proust

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

16 9221
Q:

Sodium carbonate crystal lose water molecules this property is called

A) hygroscopy B) deliquescence
C) efflorescence D) None of these
 
Answer & Explanation Answer: C) efflorescence

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

63 18233