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:

Butter is colloid formed when

A) Proteins are dispersed in water B) Water is dispersed in fat
C) Fat globules are dispersed in water D) Carbohydrates are dissolved in water
 
Answer & Explanation Answer: C) Fat globules are dispersed in water

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

1 1761
Q:

When ice cubes are made, the entropy of water

A) does not change B) decreases
C) increases D) may either increase or decrease depending on the process used
 
Answer & Explanation Answer: B) decreases

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

0 1132
Q:

Which of the following has pH value 7?

A) Pure Water B) H2SO4
C) Sodium Carbonate D) HCl
 
Answer & Explanation Answer: A) Pure Water

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

1 967
Q:

Bronze is an alloy of

A) Copper & tin B) Copper & zinc
C) Copper & iron D) Iron & nickel
 
Answer & Explanation Answer: A) Copper & tin

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

3 905
Q:

Nitrogen fixation is a process of

A) Assimilation of nitrate B) Utilisation of nitrogen gas
C) Conversion of organic nitrogen to proteins D) Conversion of molecular nitrogen to ammonia
 
Answer & Explanation Answer: C) Conversion of organic nitrogen to proteins

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

4 669
Q:

Absolute Zero is defined as

A) The temperature at which all molecular motion ceases B) At which water boils at 298K
C) At which liquid Helium boils D) At which the volume becomes zero
 
Answer & Explanation Answer: A) The temperature at which all molecular motion ceases

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

3 876
Q:

Of the following commonly used materials, the one that is not an alloy is

A) Steel B) Brass
C) Bronze D) Copper
 
Answer & Explanation Answer: D) Copper

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

1 1191
Q:

Which method will be employed to test the hardness of water?

A) Boiling B) Distillation
C) Formation of lather with soap D) None of these
 
Answer & Explanation Answer: C) Formation of lather with soap

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

2 1013