Fundamental Concepts Of Chemistry Q 1-5
5 Questions
| Attempts: 193
Questions and Answers
- 1.The soul of chemistry is its dealing with :
- A.
Internal structure changes in matter
- B.
Composition of matter
- C.
Properties of matter
- D.
Composition and properties of matter
- 2.All of the following statements are incorrect for 20 mol of hydrogen peroxide except
- A.
It has 20 mol of Hydrogen atoms
- B.
It has 30 mol of Oxygen atoms
- C.
It has 80 mol of atoms
- D.
It has 30 mol of Hydrogen atoms
- 3.If [protcon number of two atoms is same then it can be concluded that:
- A.
They are isotopes
- B.
Compounds of both with cl2 will be similar in reactivity towards other compounds
- C.
Both have same color
- D.
Both have same melting points
- 4.A chemist poured lemon juice on soil, the idea that he may have in his mind is that :
- A.
There may be a possibility of chemical reaction
- B.
Lemon juice is dangerous to health
- C.
Water should be preferred over lemon juice for drinking
- D.
Lemon juice is good for health
- 5.Dr. Khan has discovered two elements of an element with atomic number 119. The relative abundance of isotopes 119Uue300 and 119Uue305 is 70% and 30% respectively. The average atomic weight of Uue is:
- A.
301.5 a.m.u
- B.
302.5 a.m.u
- C.
303.5 a.m.u
- D.
304.5 a.m.u
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