300+ TOP MCQs on Some Basic Concepts of Chemistry and Answers

NEET  Chemistry is the very imporatant paper in the Medical Entrance EXAM. So these NEET Chemistry MCQs with Answers for all Concepts as per the new syllabus. Practice daily with these NEET Chemistry objective questions on air pollution. NEET Chemistry Some Basic Concepts of Chemistry Multiple Choice Questions

MCQs on Some Basic Concepts of Chemistry :

1. 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) 30, 20
(B) 80, 20
(C) 60, 40
(D) 20, 30

Answer

Answer: (b)

2. 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

Answer

Answer: (d)

3. 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

Answer

Answer: (a)

4. 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

Answer

Answer: (d)

5. A gas X has Cp and Cratio as 1.4, at NTP 11.2 L of gas X will contain_______ number of atoms
(A) 1.2 × 1023
(B) 3.01 × 1023
(C) 2.01 × 1023
(D) 6.02 × 1023

Answer

Answer: (d)

6. Which of the species is not paramagnetic?
(A) As+
(B) Cl
(C) Ne2+
(D) Be+

Answer

Answer: (b)

7. Pressure has the same dimension as ____________
(A) energy per unit volume
(B) energy
(C) force per unit volume
(D) force

Answer

Answer: (a)

8. A container has an equal mass of H2, Oand CH4 at 27℃, the ratio of their volume is
(A) 16:8:1
(B) 8:1:2
(C) 16:1:2
(D) 8:16:1

Answer

Answer: (c)

9. 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

Answer

Answer: (c)

10. 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) 11.2
(C) 10.2
(D) 10.8

Answer

Answer: (d)

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