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:

Which of the following solutions is alkaline?

 

A) H+ <1 × 10-7 Mol/l B) H+ = 1 × 10-4 Mol/l
C) H+ = 1 × 10-7 Mol/l D) H+ > 1 × 10-7 Mol/l
 
Answer & Explanation Answer: A) H+ <1 × 10-7 Mol/l

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

2 6374
Q:

Which one of the following is commonly used as an indicator to measure the exact pH?

 

A) Eosin B) Phenolphthalein
C) Universal indicator D) Litmus
 
Answer & Explanation Answer: C) Universal indicator

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

1 7295
Q:

Which of the following classifications is based on atomic numbers?

A) Mendeleev's Periodic Table B) Modern Periodic Table
C) Newlands Law of Octaves D) Dobereiner's Law of Triads
 
Answer & Explanation Answer: B) Modern Periodic Table

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

0 527
Q:

What is the atomicity of Phosphorous?

A) Di-atomic B) Poly-atomic
C) Tetra-atomic D) Mono-atomic
 
Answer & Explanation Answer: C) Tetra-atomic

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams

0 622
Q:

Aluminium oxide is ___ in nature.

A) amphoteric B) acidic 
C) neutral D) basic
 
Answer & Explanation Answer: A) amphoteric

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams

2 761
Q:

The process of transferring of charge from a charged object to the earth is called ______________.

 

A) neutralisation B) negation
C) terraforming D) earthing
 
Answer & Explanation Answer: D) earthing

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

2 10645
Q:

Generally covalently bonded molecules ______.

 

I. have high boiling and melting point as compare to ionically bonded molecules

II. poor conductors of electricity

III. have weak intermolecular force

 

A) Only I and II B) Only I and III
C) Only II and III D) All I, II and III
 
Answer & Explanation Answer: C) Only II and III

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

1 6249
Q:

Match the following items of column A with column B.

 

 

A) I – 3, II – 1, III – 2   B) I – 2, II – 1, III – 3  
C) I – 2, II – 3, III – 1   D) I – 1, II – 2, III – 3
 
Answer & Explanation Answer: B) I – 2, II – 1, III – 3  

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

2 6367