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:

The compound used in prickly-­heat powder to prevent excessive sweating is

A) Boric acid B) Phosphoric acid
C) Carbonic acid D) Sulphonic acid
 
Answer & Explanation Answer: A) Boric acid

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

0 1403
Q:

The elements known as primary nutrients for plants

A) Nitrogen, Phosphorus and Potassium B) Nitrogen, Oxygen and Silicon
C) Potassium, Boron and Nitrogen D) Nitrogen, Phosphorus and Iron
 
Answer & Explanation Answer: A) Nitrogen, Phosphorus and Potassium

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

1 973
Q:

Which among the following will be a negative ion?

A) If it has more electrons than protons B) If it has more electrons than neutrons
C) If it has more protons than electrons D) If it has more protons than neutrons
 
Answer & Explanation Answer: A) If it has more electrons than protons

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

1 1559
Q:

Isobars have _______.

A) Same mass numbers but different atomic numbers B) Different mass numbers but same atomic numbers
C) Same mass and atomic numbers D) Different mass and atomic numbers
 
Answer & Explanation Answer: A) Same mass numbers but different atomic numbers

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

1 671
Q:

Who invented the modern periodic table?

A) Faraday B) Mendeleev
C) Newton D) Bohr
 
Answer & Explanation Answer: B) Mendeleev

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

0 835
Q:

The absolute zero is a temperature at which _______

A) molecular motion in a gas would cease B) water freezes
C) all gases become liquid D) all gases become solid
 
Answer & Explanation Answer: A) molecular motion in a gas would cease

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

1 1093
Q:

Which of the following is not a nitrogenous fertiliser?

A) Ammonium sulphate B) Urea
C) Ammonium nitrate D) Superphospohate
 
Answer & Explanation Answer: D) Superphospohate

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

0 901
Q:

Which one of the following non­metals shows allotropy in the liquid state?

A) Carbon B) Sulphur
C) Phosphorous D) Bromine
 
Answer & Explanation Answer: B) Sulphur

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

0 1069