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Class 9 Exam  >  Class 9 Tests  >  Basic Concepts Of Chemistry - Practice Test (1) - Class 9 MCQ

Basic Concepts Of Chemistry - Practice Test (1) - Class 9 MCQ


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25 Questions MCQ Test - Basic Concepts Of Chemistry - Practice Test (1)

Basic Concepts Of Chemistry - Practice Test (1) for Class 9 2024 is part of Class 9 preparation. The Basic Concepts Of Chemistry - Practice Test (1) questions and answers have been prepared according to the Class 9 exam syllabus.The Basic Concepts Of Chemistry - Practice Test (1) MCQs are made for Class 9 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Basic Concepts Of Chemistry - Practice Test (1) below.
Solutions of Basic Concepts Of Chemistry - Practice Test (1) questions in English are available as part of our course for Class 9 & Basic Concepts Of Chemistry - Practice Test (1) solutions in Hindi for Class 9 course. Download more important topics, notes, lectures and mock test series for Class 9 Exam by signing up for free. Attempt Basic Concepts Of Chemistry - Practice Test (1) | 25 questions in 50 minutes | Mock test for Class 9 preparation | Free important questions MCQ to study for Class 9 Exam | Download free PDF with solutions
Basic Concepts Of Chemistry - Practice Test (1) - Question 1
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Chemistry does not play a major role in

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Chemistry does not deal in explaining superconductivity.

Basic Concepts Of Chemistry - Practice Test (1) - Question 2
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One mole is the amount of a substance that contains as many particles or entities as there are atoms in

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One mole is the amount of a substance that contains as many particles or entities as there are atoms in exactly 12 g of the 12C isotope

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Basic Concepts Of Chemistry - Practice Test (1) - Question 3
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....KOH +.... H3PO4 →.... K3PO4 + ....H2O.. This equation can be balanced by inserting the following in blank spaces

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3KOH + H3PO4 → K3PO4 + 3H2O.

Basic Concepts Of Chemistry - Practice Test (1) - Question 4
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We have to prepare a solution of 0.2 M NaOH from the available 1 M solution that is given to us. How much volume of 1M NaOH is required to be taken which contains 0.2 moles of NaOH
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M1V1 =M2V2 where M1M1 = 1M V1=?

Basic Concepts Of Chemistry - Practice Test (1) - Question 5
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What is the mass of 1 molecule of O2?
Basic Concepts Of Chemistry - Practice Test (1) - Question 6
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Matter can be classified at the macroscopic or bulk level as
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at macroscopic level matter is classified as mixture or pure substances.

Basic Concepts Of Chemistry - Practice Test (1) - Question 7
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A given compound always contains exactly the same proportion of elements by weight. This law is stated by
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this law is stated by Proust.

Basic Concepts Of Chemistry - Practice Test (1) - Question 8
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-----CO (g) + ----- H2(g) → ----- C8H18(l) + ----- H2O. This equation can be balanced by inserting the following in blank spaces
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Basic Concepts Of Chemistry - Practice Test (1) - Question 9
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There are ____ in 0.101 mm?
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1cm=10mm

Basic Concepts Of Chemistry - Practice Test (1) - Question 10
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What is the mass of 1 mole of O2?
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mass of 6.02 x 1023 molecules of O2 = 32g = mass of 1mole of O2.

Basic Concepts Of Chemistry - Practice Test (1) - Question 11
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In a homogeneous mixture,
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Homogeneous mixture has a uniform composition throughout.

Basic Concepts Of Chemistry - Practice Test (1) - Question 12
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Avogadro constant is
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Avagadros constant is entities in 1 mol = 6.022 x 1023

Basic Concepts Of Chemistry - Practice Test (1) - Question 13
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---- Al + ------ O2 → ------ Al2O3 . This equation can be balanced by inserting the following in blank spaces
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Basic Concepts Of Chemistry - Practice Test (1) - Question 14
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20 m/s is the same as:
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1km = 1000m

Basic Concepts Of Chemistry - Practice Test (1) - Question 15
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For the reaction
 
of C4H10 is combusted in 1000 g of O2. The yield of H2OH2O and the limiting agent in the reaction are
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moloes of C4H, given = 51.72 mol Moles of O2 = 31.25 mol. Since 2 mol ofC4H10 requires 13 mol of O2 so 51.72 mol of C4H10 require 336.18 mol of O2 but O2 we have is only 31.25 mol therefore O2 is limiting reagent. Therefore 13 mol of O2 gives 10 mol of H2O so 31.25 mol will give 24.038 mol of water = 432 g of water.

Basic Concepts Of Chemistry - Practice Test (1) - Question 16
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Which of the following statements about pure substances correct?
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pure substances are elements and compounds . they have fixed composition while mixtures have variable composition.

Basic Concepts Of Chemistry - Practice Test (1) - Question 17
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An empirical formula represents the simplest
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empirical formula is the simplest formula of a compound.

Basic Concepts Of Chemistry - Practice Test (1) - Question 18
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------ Ba3N2 +----- H2O → ------ Ba (OH)2 + ------ NH3 . This equation can be balanced by inserting the following in blank spaces
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Basic Concepts Of Chemistry - Practice Test (1) - Question 19
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30 microliters is the same as:
Basic Concepts Of Chemistry - Practice Test (1) - Question 20
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How many molecules of H2O are there in 18g of water? (Hint: Avagadro’s Number = 6.02 x 1023 atoms/mol)
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18g H2O = 1mol water = 6.02 x 1023 molecules of water

Basic Concepts Of Chemistry - Practice Test (1) - Question 21
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Particles of compounds are
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compounds are made when molecules or atoms of two or more different elements combine together in fixed ratio.

Basic Concepts Of Chemistry - Practice Test (1) - Question 22
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Molecular formula shows the.
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Molecular formula is the exact no. of atoms present in a molecule of a compound.

Basic Concepts Of Chemistry - Practice Test (1) - Question 23
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The molar mass of CO2 is
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Molar mass= 12+2(16)=44g

Basic Concepts Of Chemistry - Practice Test (1) - Question 24
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20 grams is the same as:
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1mg=1000

Basic Concepts Of Chemistry - Practice Test (1) - Question 25
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78 g of an optically active L-amino acid (A) is treated with NaNO2/HCl at 0º C. 448 cm3 of nitrogen was at STP is evolved. A sample of protein has 0.25% of this amino acid by mass. The molar mass of the protein is
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