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NEET Exam  >  NEET Test  >  Chemistry Class 11  >  Test: Some Basic Concepts Of Chemistry - NEET MCQ

Some Basic Concepts Of Chemistry - Free MCQ Practice Test with solutions,


MCQ Practice Test & Solutions: Test: Some Basic Concepts Of Chemistry (18 Questions)

You can prepare effectively for NEET Chemistry Class 11 with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Some Basic Concepts Of Chemistry". These 18 questions have been designed by the experts with the latest curriculum of NEET 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 18 minutes
  • - Number of Questions: 18

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Test: Some Basic Concepts Of Chemistry - Question 1
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Physical properties are those properties which ______ measured or observed ______ changing the identity or the composition of the substance

Detailed Solution: Question 1

Physical properties are those which can be measured or observed without changing the identity or composition of the substance.

Test: Some Basic Concepts Of Chemistry - Question 2
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The molar mass of Al2O3 is

Detailed Solution: Question 2

The calculation of molar mass involves summing the contributions from each element in the compound. In this case, the molar mass is calculated as follows:

  • Element 1: 2 atoms of element with atomic mass 27
  • Element 2: 3 atoms of element with atomic mass 16

The calculation can be broken down into the following steps:

  • Calculate contribution from the first element: 2 × 27 = 54
  • Calculate contribution from the second element: 3 × 16 = 48

Now, add these contributions together:

  • Total Molar Mass: 54 + 48 = 102 g/mol

Thus, the molar mass of the compound is 102 g/mol.

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Test: Some Basic Concepts Of Chemistry - Question 3
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SI units for Base Physical Quantities of length, mass and current are

Detailed Solution: Question 3

The SI units for the base physical quantities are as follows:

  • Length: Meter (m) is the SI unit.
  • Mass: Kilogram (kg) is the SI unit.
  • Current: Ampere (A) is the SI unit.

Option A correctly lists Meter, Kilogram, and Ampere, which are the correct SI units for length, mass, and current, respectively.

Test: Some Basic Concepts Of Chemistry - Question 4
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Molarity is defined as

Detailed Solution: Question 4

Molarity is defined as the number of moles of solute present per litre of solution. This means that for any given solution, its molarity is calculated by:

  • Dividing the number of moles of the solute by the volume of the solution in litres.

Therefore, the correct answer is option C.

Test: Some Basic Concepts Of Chemistry - Question 5
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For the reaction Fe2O3 (s) + 3 CO (g) → 2 Fe (g) + 3 CO2, 224 g of CO is available to react with 400 g Fe2O3, the yield of iron and CO2, are:

Detailed Solution: Question 5

B: 280 g Fe and 330 g CO2.

Moles of CO = 224 ÷ 28 g·mol-1 = 8 mol.

Moles of Fe2O3 = 400 ÷ 160 g·mol-1 = 2.5 mol.

Required CO for 2.5 mol Fe2O3 = 2.5 × 3 = 7.5 mol. Available CO = 8 mol, so Fe2O3 is the limiting reagent.

Moles of Fe formed = 2.5 × 2 = 5 mol.

Mass of Fe = 5 × 56 g·mol-1 = 280 g.

Moles of CO2 formed = 2.5 × 3 = 7.5 mol.

Mass of CO2 = 7.5 × 44 g·mol-1 = 330 g.

Therefore, option B is correct.

Test: Some Basic Concepts Of Chemistry - Question 6
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According to the law of conservation of mass, a balanced chemical equation has

Detailed Solution: Question 6

According to this total mass of reactants = total mass of product so no. of atoms of each element in reactant is equal to no. of atoms of that element in product

Test: Some Basic Concepts Of Chemistry - Question 7
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The molar mass of C6H10O5  is

Detailed Solution: Question 7

The molar mass is calculated by summing the atomic masses of each element:

  • Carbon (C): 6 atoms × 12 g/mol = 72 g/mol
  • Hydrogen (H): 10 atoms × 1 g/mol = 10 g/mol
  • Oxygen (O): 5 atoms × 16 g/mol = 80 g/mol

Total molar mass = 72 + 10 + 80 = 162 g/mol.

Test: Some Basic Concepts Of Chemistry - Question 8
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A measured temperature is 1000F on Fahrenheit scale, then what is this reading be on Celsius scale:

Detailed Solution: Question 8

C-0/100-0 = F-32/180.
C/5= F-32/9.
C/5= 100-32/9.
C/5= 68/9.
C= 68×5/9.
C= 340/9.
C= 37.77.
C= 37.8

Test: Some Basic Concepts Of Chemistry - Question 9
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SI unit of density is

Detailed Solution: Question 9

Density = mass/volume. SI unit of mass is kg and that of volume is m3 so SI unit of Density is kg m−3

Test: Some Basic Concepts Of Chemistry - Question 10
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The calculation of masses (sometimes volumes also) of the reactants and the products involved in a chemical reaction is called

Detailed Solution: Question 10

The calculation of masses (sometimes volumes also) of the reactants and the products involved in a chemical reaction is called stoichiometry.

Test: Some Basic Concepts Of Chemistry - Question 11
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The molar mass of CaCO3 is

Detailed Solution: Question 11

The molar mass of CaCO3 is calculated as follows:

  • Molar mass = (1 × 40 g/mol)
  • + (1 × 12 g/mol)
  • + (3 × 16 g/mol)

This results in:

  • Molar mass = 100 g/mol

Test: Some Basic Concepts Of Chemistry - Question 12
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Molarity of NaOH in a solution prepared by dissolving 4 g of NaOH in enough water to form 250 ml of solution is:

Detailed Solution: Question 12

Test: Some Basic Concepts Of Chemistry - Question 13
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The kelvin scale is related to celsius scale by

Detailed Solution: Question 13

The Kelvin scale is an absolute temperature scale where 0 K corresponds to absolute zero, the coldest possible temperature.

To convert a temperature from Celsius to Kelvin, you add 273.15 to the Celsius temperature. Thus, the relationship between the Kelvin (K) and Celsius (°C) scales is given by the formula:

K = °C + 273.15

This conversion accounts for the offset between the two scales, ensuring that the temperature in Kelvin accurately reflects the absolute temperature.

Test: Some Basic Concepts Of Chemistry - Question 14
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The molar mass of AgNO3 is

Detailed Solution: Question 14

Molar mass of AgNO3 = mass of Ag + N + O3 = 107.87 + 14 + 3* 16 = 107. 87 + 14 + 48 = 169.87 g

Test: Some Basic Concepts Of Chemistry - Question 15
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The molar mass of ZnSO4 is

Detailed Solution: Question 15

Chemical Formula: ZnSO4

Molar Mass Calculation:

  • Zinc (Zn): 65.38 g/mol
  • Sulfur (S): 32.07 g/mol
  • Oxygen (O4): 4 × 16.00 g/mol = 64.00 g/mol

Total Molar Mass: 65.38 + 32.07 + 64.00 = 161.45 g/mol

The molar mass of anhydrous ZnSO4 is approximately 161.47 g/mol.

Test: Some Basic Concepts Of Chemistry - Question 16
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How many atoms of hydrogen are in 67.2 L of H2 at STP?

Detailed Solution: Question 16

Standard temperature and pressure (STP) is defined as 0 degrees Celsius and 1 atmosphere of pressure. At STP, 1 mole of any gas occupies 22.4 liters.
First, calculate the number of moles of hydrogen gas (H2) in 67.2 liters:
67.2 L / 22.4 L/mole = 3 moles of H2
Each molecule of H2 contains 2 atoms of hydrogen. Therefore, 3 moles of H2 contains:
3 moles * (6.022 x 10^23 molecules/mole) * 2 atoms/molecule = 3.6132 x 10^24 atoms of hydrogen.

Test: Some Basic Concepts Of Chemistry - Question 17
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How many atoms of Oxygen are there in 18 g of water?

(Hint: Avogadro's number = 6.02 × 1023 atoms/mol)

Detailed Solution: Question 17

Answer: B.

The molar mass of H2O is approximately 18.015 g mol-1, so 18 g corresponds to 18 ÷ 18.015 ≈ 0.9992 mol, which is effectively 1.00 mol for this calculation.

One mole contains 6.02 × 1023 molecules (Avogadro's number). Each water molecule contains one oxygen atom, therefore the number of oxygen atoms equals the number of water molecules.

Number of oxygen atoms ≈ 1.00 × 6.02 × 1023 = 6.02 × 1023 atoms. Hence option B is correct.

Test: Some Basic Concepts Of Chemistry - Question 18
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The number of moles of solute present in 1 kg of solvent is called:

Detailed Solution: Question 18

Molality is defined as the number of moles of solute per kilogram of solvent.

  • Moles of solute: The quantity of the substance being dissolved.
  • Kilograms of solvent: The mass of the substance in which the solute is dissolved.

This means that:

  • Molality is a way to express the concentration of a solution.
  • It is particularly useful in situations where temperature changes occur, as it does not change with temperature variations.

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About this NEET Practice Test

This test contains 18 MCQs on Some Basic Concepts Of Chemistry with detailed solutions for each question. It is part of the Chemistry Class 11 course on EduRev, designed to align with the current NEET syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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