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NEET Exam  >  NEET Tests  >  Test: Some Basic Concepts of Chemistry (April 21) - NEET MCQ

Test: Some Basic Concepts of Chemistry (April 21) - NEET MCQ


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20 Questions MCQ Test - Test: Some Basic Concepts of Chemistry (April 21)

Test: Some Basic Concepts of Chemistry (April 21) for NEET 2024 is part of NEET preparation. The Test: Some Basic Concepts of Chemistry (April 21) questions and answers have been prepared according to the NEET exam syllabus.The Test: Some Basic Concepts of Chemistry (April 21) MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Some Basic Concepts of Chemistry (April 21) below.
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Test: Some Basic Concepts of Chemistry (April 21) - Question 1
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According to the law of conservation of mass, a balanced chemical equation has

Detailed Solution for Test: Some Basic Concepts of Chemistry (April 21) - Question 1

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 (April 21) - Question 2
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The molar mass of C6H10O5  is

Detailed Solution for Test: Some Basic Concepts of Chemistry (April 21) - Question 2

Molar mass = 6(12) + 10(1) + 5(16) = 162g

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Test: Some Basic Concepts of Chemistry (April 21) - Question 3
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A measured temperature is 1000F on Fahrenheit scale, then what is this reading be on Celsius scale:

Detailed Solution for Test: Some Basic Concepts of Chemistry (April 21) - Question 3

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 (April 21) - Question 4
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SI unit of density is
Detailed Solution for Test: Some Basic Concepts of Chemistry (April 21) - Question 4

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 (April 21) - Question 5
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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 for Test: Some Basic Concepts of Chemistry (April 21) - Question 5

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 (April 21) - Question 6
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The molar mass of CaCO3 is
Detailed Solution for Test: Some Basic Concepts of Chemistry (April 21) - Question 6

Molar mass = 40 + 12 + 3(16) = 100g

Test: Some Basic Concepts of Chemistry (April 21) - Question 7
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There are ____ in 12.0 ml?
Detailed Solution for Test: Some Basic Concepts of Chemistry (April 21) - Question 7

Since we know that 1litre -1000ml 1ml-1\1000litre So,12ml-1/1000×12=12/1000 =0.012

Test: Some Basic Concepts of Chemistry (April 21) - Question 8
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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:
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Test: Some Basic Concepts of Chemistry (April 21) - Question 9
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The kelvin scale is related to celsius scale by
Detailed Solution for Test: Some Basic Concepts of Chemistry (April 21) - Question 9

K = °C + 273.15

Test: Some Basic Concepts of Chemistry (April 21) - Question 10
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Molecular mass of glucose (C6H12O6) is
Detailed Solution for Test: Some Basic Concepts of Chemistry (April 21) - Question 10

Molecular mass will be = 6(12) + 12(1) + 6(16) = 180u.

Test: Some Basic Concepts of Chemistry (April 21) - Question 11
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The molar mass of AgNO3 is
Detailed Solution for Test: Some Basic Concepts of Chemistry (April 21) - Question 11

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 (April 21) - Question 12
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The molar mass of ZnSO4 is
Detailed Solution for Test: Some Basic Concepts of Chemistry (April 21) - Question 12

Chemical Formula: ZnSO4
Molar Mass: 161.47 g/mol (anhydrous)

Test: Some Basic Concepts of Chemistry (April 21) - Question 13
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How many atoms of hydrogen are in 67.2 L of H2 at STP?
Detailed Solution for Test: Some Basic Concepts of Chemistry (April 21) - Question 13

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 (April 21) - Question 14
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In scientific notation for such numbers, any number can be represented in the form N × 10n where
Detailed Solution for Test: Some Basic Concepts of Chemistry (April 21) - Question 14

n can vary from to 10 and can be +ve or –ve.

Test: Some Basic Concepts of Chemistry (April 21) - Question 15
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Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.
Assertion: In laboratory, a solution of a desired concentration is prepared by diluting a stock solution.
Reason: Stock solution is the solution of higher concentration.
Detailed Solution for Test: Some Basic Concepts of Chemistry (April 21) - Question 15

Correct option is A
The stock solution is the solution of higher concentration. Therefore in the laboratory, a solution of the desired concentration is prepared by diluting a stock solution.
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Hence, option A is correct

Test: Some Basic Concepts of Chemistry (April 21) - Question 16
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How many atoms of Oxygen are there in 18g of water?

(Hint: Avogadro’s Number = 6.02 x 1023 atoms/mol)
Detailed Solution for Test: Some Basic Concepts of Chemistry (April 21) - Question 16

18g H2O = 1mol water = 6.02 x 1023 molecules of water = 6.02 x 1023 atoms of oxygen.

Test: Some Basic Concepts of Chemistry (April 21) - Question 17
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Chemistry does not play a major role in
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Chemistry does not deal in explaining superconductivity.

Test: Some Basic Concepts of Chemistry (April 21) - Question 18
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If a matter has definite volume and definite shape, then it is:
Detailed Solution for Test: Some Basic Concepts of Chemistry (April 21) - Question 18


Solid
Holds shape
Fixed Volume


Liquid
Shape of Container
Free Surface
Fixed Volume


Gas
Shape Of Container
Volume of Container

Explanation:

Solid is the only state of matter that has a definite shape and definite volume.

Test: Some Basic Concepts of Chemistry (April 21) - Question 19
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The number of moles of solute present in 1 kg of solvent is called:
Detailed Solution for Test: Some Basic Concepts of Chemistry (April 21) - Question 19

Molality is defined as no. of moles of solute present per kg of solvent.

Test: Some Basic Concepts of Chemistry (April 21) - Question 20
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There are ____ in 0.05 ml?
Detailed Solution for Test: Some Basic Concepts of Chemistry (April 21) - Question 20

1L=1000mL so 0.00005L=0.05mL.

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