set 1 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) anion
(b) cation
(c) molecule
(d) salt
The correct answers to the above question in:
Answer: (a)
e.g., Cl + e- ⟶ Cl- (anion)
Discuss Form
Read more chemistry basic Based General Science Questions and Answers
Question : 1
Which of the following statements is incorrect for cathode rays?
a) Their nature depends upon the nature of gas present in the discharge tube.
b) They cost shadow of solid objects placed in their path
c) They move in straight line
d) They get deflected towards positive charge.
Answer »Answer: (a)
Question : 2
An atom of carbon has 6 protons. Its mass number is 12. How many neutrons are present in an atom of carbon?
a) 10
b) 6
c) 12
d) 14
Answer »Answer: (b)
Question : 3
The isotopes of an element have
a) same atomic number
b) same mass number
c) same number of neutrons
d) None of these
Answer »Answer: (a)
Isotopes have a same atomic number but a different mass numbers.
e.g., 17Cl35 and 17Cl36 .
Question : 4
Which of the following have equal number of neutrons and protons?
a) Deuterium
b) Fluorine
c) Hydrogen
d) Chlorine
Answer »Answer: (a)
In 1H2 – no. of p = 1 and no. of n = 2 – 1 = 1
Question : 5
The number of molecules in one mole of a gas is
a) 6.023 × 1021
b) 6.023 × 1022
c) 6.023 × 1023
d) 6.023 × 1020
Answer »Answer: (c)
Question : 6
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)
Verbal Reasoning
Question & Answer Quiz
Non Verbal Reasoning
Question & Answer Quiz
Quantitative Aptitude
Question & Answer Quiz
Computer MCQ
Question & Answer Quiz
General English
Question & Answer Quiz
History GK
Question & Answer Quiz
Polity GK
Question & Answer Quiz
Geography GK
Question & Answer Quiz
Economy GK
Question & Answer Quiz
General Awareness GK
Question & Answer Quiz
Recently Added Subject & Categories For All Competitive Exams
New 100+ Compound Interest MCQ with Answers PDF for IBPS
Compound Interest verbal ability questions and answers solutions with PDF for IBPS RRB PO. Aptitude Objective MCQ Practice Exercises all competitive exams
Continue Reading »
100+ Mixture and Alligation MCQ Questions PDF for IBPS
Most importantly Mixture and Alligation multiple choice questions and answers with PDF for IBPS RRB PO. Aptitude MCQ Practice Exercises all Bank Exams
Continue Reading »
IBPS Profit and Loss Questions Solved Problems with PDF
Most important Profit and Loss multiple choice questions and answers with PDF for IBPS RRB PO. 100+ Aptitude MCQ Practice Exercises all competitive exams
Continue Reading »
100+ Average Aptitude Questions Answers solutions MCQ PDF
New Average multiple choice questions and answers with PDF for IBPS RRB PO. 100+ Quantitative Aptitude MCQ Practice Exercises all competitive exams
Continue Reading »