MCQ on Some Basic Concepts of Chemistry: Chemistry is considered to be the most scoring subject in NEET JEE Exam. As it is one of the easiest scoring subjects, it is often ignored and undermined a subject. But if you want to get an edge over others, here is a tip, master NEET/JEE Chemistry concepts. Chemistry demands the attention of students in understanding reactions and concrete basic understanding but once done it only gets easier from there. Mastering NCERT syllabus for NEET/JEE Chemistry should be topping your list of to-do for chemistry.

In this post we are providing you MCQ on Some Basic Concepts of Chemistry, which will be beneficial for you in upcoming NEET, JEE, Medical and Engineering Exams.

MCQ on Some Basic Concepts of Chemistry

Q1. Pressure has the same dimension as ________.
a) force
b) energy
c) energy per unit volume
d) force per unit volume

Q2.  Boron exists as two stable isotopes; ¹⁰B(19%) and ¹¹B(81%). Find out the average atomic weight of boron in the periodic table.
a) 10.0
b) 10.2
c) 10.8
d) 11.2

Q3. There are two chlorides of sulphur S₂Cl₂ and SCl₂. What is the equivalent mass of S in SCl₂ ?
a) 64.8 g/mole
b) 32 g/mole
c) 16 g/mole
d) 8 g/mole

Q4. A gas X has C_p and C_v ratio as 1.4, at NTP 11.2 L of gas X will contain_______ number of atoms.
a) 1.2 × 10²³
b) 2.01 × 10²³
c) 3.01 × 10²³
d) 6.02 × 10²³

Q5. A container has an equal mass of H₂, O₂ and CH₄ at 27℃, the ratio of their volume is ________.
a) 8:1:2
b) 8:16:1
c) 16:1:2
d) 16:8:1

Q6. The number of atoms present in 0.1 moles of a triatomic gas is ________.
a) 1.806 × 10²³
b) 1.806 × 10²²
c) 3.600 × 10²³
d) 6.026 × 10²²

Q7. Which of the species is not paramagnetic?
a) As⁺
b) Be⁺
c) Cl^–
d) Ne²⁺

Q8. Elements X and Y combine to form two compounds XY and X₂Y. Find the atomic weight of X and Y, if the weight of 0.1 moles of XY is 10g and 0.05 moles of X₂Y is 9g.
a) 20, 30
b) 30, 20
c) 60, 40
d) 80, 20

Q9. Find the volume of O₂ required to burn 1 L of propane completely, measured at 0℃ temperature and 1 atm pressure.
a) 10 L
b) 7 L
c) 6 L
d) 5 L

Q10. Which one will have maximum numbers of water molecules?
a) 18 molecules of water
b) 1.8 grams of water
c) 18 grams of water
d) 18 moles of water

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