set 2 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 3 EXERCISES
The following question based on atomic structure, molecules and nuclear chemistry topic of general science mcq
(a) Water at 4°C but having molecular weight 19 u
(b) Water having molecular weight 20 u
(c) Water having molecular weight 18 u
(d) Water below the ice in a frozen sea
The correct answers to the above question in:
Answer: (b)
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Read more chemistry basic Based General Science Questions and Answers
Question : 1
Which one of the following reactions is the main cause of the energy radiation from the Sun?
a) Chemical reaction
b) Fission reaction
c) Fusion reaction
d) Diffusion reaction
Answer »Answer: (c)
Question : 2
Which of the following has a charge of +1 and a mass of 1 amu ?
a) A proton
b) An electron
c) A neutron
d) A helium nucleus
Answer »Answer: (a)
Question : 3
Match List-I with List-II and select the correct answer using the code given below the lists.
List-I (Scientist) | List-II (Discovery) |
A. Goldstein | 1. Atomic theory |
B. Chadwick | 2. Proton |
C. JJ Thomson | 3. Neutron |
D. John Dalton | 4. Electron |
a) 1 4 3 2
b) 2 4 3 1
c) 2 3 4 1
d) 1 3 4 2
Answer »Answer: (c)
Question : 4
The cathode ray experiment was done for the first time by
a) John Dalton
b) Goldstein
c) J.J. Thomson
d) Rutherford
Answer »Answer: (c)
Question : 5
Which of the following pairs is/are correctly matched?
- Isotopes : Atoms with same atomic number but different atomic mass
- Isobars : Atoms with same number of neutrons but different atomic number
- Isotones : Atoms with same mass number but different atomic number
a) 1 and 2 only
b) 1 only
c) 1, 2 and 3
d) 2 only
Answer »Answer: (b)
Question : 6
Which of the following pairs are isotopes?
a) Ice and steam
b) Nitric oxide and nitrogen dioxide
c) Oxygen and ozone
d) Hydrogen and deuterium
Answer »Answer: (d)
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