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Q:

Which of the following group is NOT Dobereiner Triads?

 

A) Li, Na, K B) N, P Au
C) Cl, Br, I D) Ca, Sr, Ba

Answer:   B) N, P Au



Explanation:
Subject: Chemistry
Exam Prep: Bank Exams
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In hydrolysis reactions compounds react with

A) carbon, causing decomposition B) glucose, causing decomposition
C) water, causing decomposition D) hydrogen, causing decomposition
 
Answer & Explanation Answer: C) water, causing decomposition

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The atoms of the elements having same difference between mass number and atomic number are called ______.

A) Isobar B) Isotopes
C) Isotones D) No option is correct
 
Answer & Explanation Answer: C) Isotones

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Electrons can be deflected by which of the following?

A) Only magnetic field B) Only electric field
C) Both magnetic and electric field D) No option is correct
 
Answer & Explanation Answer: C) Both magnetic and electric field

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Which of the following is a CORRECT statement?

A) Only compounds are pure substance B) Compounds are impure substance
C) Only elements are pure substance D) Both compounds and elements are pure substance
 
Answer & Explanation Answer: D) Both compounds and elements are pure substance

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Q:

Isobars are atoms of different chemical elements that have ______.

 

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

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Q:

Which of the following is used in gunpowder?

A) Potassium bromide B) Potassium nitrate
C) Monopotassium tartarate D) Potassium sulphate
 
Answer & Explanation Answer: B) Potassium nitrate

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If an atom has atomic number 10 and mass number 23, then what will be the number of protons and neutrons in an atom respectively?

A) 0, 10 B) 10, 23
C) 13, 10 D) 10, 13
 
Answer & Explanation Answer: D) 10, 13

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Who was the first man to go to space?

A) Yuri Gagarin B) Yuri Rontgen
C) Yuris Cui D) Yuris Mahatinn
 
Answer & Explanation Answer: A) Yuri Gagarin

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