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:

Atomic explosion is triggered by

A) thermo nuclear reaction B) chemical reaction
C) controlled chain reaction D) uncontrolled chain reaction
 
Answer & Explanation Answer: D) uncontrolled chain reaction

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

2 868
Q:

Which is known as carbolic acid?

A) Phenol B) Ethanol
C) Acetic acid D) Oxalic acid
 
Answer & Explanation Answer: A) Phenol

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

4 939
Q:

On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because ________

A) Mercury is a metal B) Density of mercury is greater than that of water
C) Cohesion of mercury is greater than its adhesion with glass D) Cohesion of water is greater than its adhesion with glass
 
Answer & Explanation Answer: C) Cohesion of mercury is greater than its adhesion with glass

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

4 841
Q:

Terylene is a condensation polymer of ethylene glycol and which acid?

A) Benzoic Acid B) Salicylic acid
C) Phthalic acid D) Terephthalic acid
 
Answer & Explanation Answer: D) Terephthalic acid

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

2 1014
Q:

The most serious air pollutant causing health hazard is

A) Sulphur dioxide B) Carbon monoxide
C) Ozone D) Nitrogen oxide
 
Answer & Explanation Answer: A) Sulphur dioxide

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

2 1262
Q:

The biogas used for cooking is a mixture of which of the following ?

A) Carbon dioxide & oxygen B) Isobutane & propane
C) Methane & carbon monoxide D) Methane & carbon dioxide
 
Answer & Explanation Answer: D) Methane & carbon dioxide

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

4 1283
Q:

Why is Carbon Monoxide a pollutant ?

A) Reacts with haemoglobin B) Makes nervous system inactive
C) It reacts with Oxygen D) It inhibits glycolysis
 
Answer & Explanation Answer: A) Reacts with haemoglobin

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

2 1000
Q:

What is contained in Chlorophyll ?

A) sodium B) potassium
C) manganese D) magnesium
 
Answer & Explanation Answer: D) magnesium

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

1 1028