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 atoms of the elements which have same number of neutrons are called

A) Isobars B) Isotopes
C) Isotones D) None
 
Answer & Explanation Answer: C) Isotones

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

4 2746
Q:

Species containing same number of electrons are called

A) Isotopes B) Isobars
C) Isoelectronic D) Isotones
 
Answer & Explanation Answer: C) Isoelectronic

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

24 8653
Q:

The atoms of the elements having same mass number but different atomic number are called

A) Isotopes B) Isobars
C) Isotones D) Isomers
 
Answer & Explanation Answer: B) Isobars

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

6 4286
Q:

Which one is not the isotopes of hydrogen

A) Protium B) Deuter
C) Tritium D) All
 
Answer & Explanation Answer: C) Tritium

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

2 2791
Q:

In isotopes the number of neutrons are

A) same B) different
C) both D) none
 
Answer & Explanation Answer: B) different

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

3 3818
Q:

Which one of the following elements is essential for construction is nuclear reactors

A) Cobalt B) Nickel
C) Zirconium D) Tungsten
 
Answer & Explanation Answer: C) Zirconium

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

59 15425
Q:

Which one of the following is not radioactive

A) Astanine B) Francium
C) Tritium D) Zirconium
 
Answer & Explanation Answer: D) Zirconium

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

13 6983
Q:

A radioactive substance has a half life of four months, three-fourth of the substance would decay in

A) 3 months B) 4 months
C) 8 months D) 12 months
 
Answer & Explanation Answer: C) 8 months

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

80 14109