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:

Nucleons are

A) protons and neutrons B) neutrons and electros
C) protons and electrons D) protons, neutrons and electrons
 
Answer & Explanation Answer: A) protons and neutrons

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

1 2777
Q:

Isotopes of the atoms of same element have

A) same number of neutrons B) same number of protons
C) same atomic mass D) different chemical properties
 
Answer & Explanation Answer: B) same number of protons

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

2 2562
Q:

Which of the properties of the element is a whole number

A) atomic mass B) atomic number
C) atomic radius D) atomic volume
 
Answer & Explanation Answer: B) atomic number

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

5 3574
Q:

The number of neutrons in dipositive Zinc ion is

A) 34 B) 36
C) 38 D) 40
 
Answer & Explanation Answer: D) 40

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

10 5308
Q:

The particle with 13 protons and 10 electrons is

A) Al -atom B) Al3+ ion
C) nitrogen isotope D) None of these
 
Answer & Explanation Answer: B) Al3+ ion

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

23 8665
Q:

The nitrogen atom has 7 protons and 7 electrons,The nitride ion will have

A) 10 protons and 7 electrons B) 7 protons and 10 electrons
C) 4 protons and 7 electrons D) 4 protons and 10 electrons
 
Answer & Explanation Answer: B) 7 protons and 10 electrons

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

42 14304
Q:

Rutherford's alpha-scattering experiment related to the size of the

A) nucleus B) atom
C) electron D) neutron
 
Answer & Explanation Answer: A) nucleus

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

2 3416
Q:

What is the element present in urea

A) C,H,O B) C,N,O
C) C,N,H D) C,O,N,H
 
Answer & Explanation Answer: D) C,O,N,H

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

45 15793