Natural Science Quiz Questions and Answers for Competitive Exams
Whose register is the montrix record?
(A) Dangerous foreign species
(B) endangered wild species
(C) Aquatic places at risk under anthropogenic activities
(D) None of these
Correct Answer : C
Explanation :
The Montreux Record is a register of wetland sites on the List of Wetlands of International Importance where changes in ecological character have occurred, are occurring, or are likely to occur as a result of technological developments, pollution or other human interference. It is maintained as part of the Ramsar List.
An aquatic plant was introduced to the US to remove pollution in Indian aquatic bodies as a troublesome weed. what is its name?
(A) hawthorn
(B) Egiolps
(C) hyacinth
(D) Pistia
Correct Answer : B
Explanation :
So the correct answer is 'Eichhornia crassipes' An aquatic plant introduced from America to check pollution turned out to be a troublesome weed in Indian water bodies.
Who first used the word “radioactivity”?
(A) Joseph
(B) Arrhenius
(C) Henri Becquerel
(D) Watson
Correct Answer : C
Explanation :
Antoine Henri Becquerel was a French engineer, physicist, Nobel laureate, and the first person to discover evidence of radioactivity. Although it was Henri Becquerel who discovered radioactivity, it was "Marie Curie" who coined the term (radioactivity).
99.985% of hydrogen atoms have only one proton. What is that called?
(A) Helium
(B) Protium
(C) Electron
(D) None of these
Correct Answer : B
Explanation :
The most abundant isotope, protium (1H), or light hydrogen, has no neutrons and only one proton and one electron. Protium is stable and makes up 99.985% of naturally occurring hydrogen atoms. The nucleus of deuterium (2H) contains one neutron and one proton.
What does the Lewis symbol represent?
(A) Valence electrons in an atom
(B) Standard melting point
(C) Distance between atomic nuclei
(D) Standard Qbthnak
Correct Answer : A
Explanation :
Lewis symbols are simplified Bohr diagrams that represent only the electrons in the outermost energy level. The released electrons are in filled energy levels, which do not contribute to the chemical properties of the respective species. Therefore Lewis symbols are useful to study elemental properties and reactions.
Natural Science Quiz Questions and Answers
1. Who is honoured as the Father of Modern Chemistry?
(A) Antoine Lavoisier
(B) David Joseph
(C) Rinky Martin
(D) Newton
Ans . A
2. Who invented periodic table?
(A) Dmitri Mendeleev
(B) David Joseph
(C) Rinky Martin
(D) Newton
Ans . A
3. Which is the most abundant gas in the earth's atmosphere?
(A) Nitrogen (78.08%)
(B) Hydrogen
(C) Carbon-di-oxide
(D) Helium
Ans . A
4. Which gas evolved from paddy fields and marshes?
(A) Methane
(B) Hydrogen
(C) Carbon-di-oxide
(D) Helium
Ans . A
5. Which toxic element present in automobile exhausts?
(A) Lead
(B) Iron
(C) copper
(D) Tustin
Ans . A
6. Which gases cause acid rain?
(A) Sulphur dioxide, Nitrogen oxides
(B) Hydrogen
(C) Carbon-di-oxide
(D) Helium
Ans . A
7. Which metal is used in the making of microchips?
(A) Silicon
(B) Iron
(C) copper
(D) Tustin
Ans . A
8. What is the toxicity caused by silicon called?
(A) Silicosis
(B) Silicon
(C) Oxygen
(D) Carbon
Ans . A
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Rajesh Bhatia
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