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Some Basic Concepts of Chemistry — BITSAT Chemistry PYQs

24 previous year questions from Some Basic Concepts of Chemistry with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

24 questionsChemistrySolutions on every page

1 L closed flask contains a mixture of 4 g of methane and 4.4 g of carbon dioxide. The pressure inside the flask at 27^ C is [Assume ideal behaviour of gases]

BITSAT 2024 Solution View → 2

In which mode of expression, the concentration of a solution remains independent of temperature?

BITSAT 2024 Solution View → 3

A certain metal sulphide, M S₂ , is used extensively as a high temperature lubricant. If MS ₂ is 40.06 % by mass sulphur, metal M has atomic mass.

BITSAT 2022 Solution View → 4

If 0.2 gram of an organic compound containing carbon, hydrogen and oxygen on combustion, yielded 0.147 gram carbon dioxide and 0.12 gram water. What will be the content of oxygen i

BITSAT 2020 Solution View → 5

An ideal gaseous mixture of ethane ( C ₂ H ₆ ) and ethene ( C ₂ H ₄ ) occupies 28 litre at 1 atm and 273 ~K . The mixture reacts completely with 128 ~g O ₂ to produce CO ₂ and H ₂

BITSAT 2020 Solution View → 6

The amount of H ₂ O ₂ present in 1 litre of 1.5 ~N H ₂ O ₂ solution, is:

BITSAT 2020 Solution View → 7

In a compound C , H and N are present in 9 : 1 : 3 . 5 by weight. If molecular weight of compound is 108 , the molecular formula of compound is

BITSAT 2019 Solution View → 8

The empirical formula and molecular mass of a compound are CH 2 O and 180 g respectively. The molecular formula of the compound will be

BITSAT 2018 Solution View → 9

On electrolysis of water, a total of 1 mole of gases is evolved. The amount of water decomposed is

BITSAT 2017 Solution View → 10

0 . 765 g of an acid gives 0 . 535 g of CO 2 and 0 . 138 g of H 2 O . Then, the ratio of percentage of carbon and hydrogen is

BITSAT 2017 Solution View → 11

Which of the following has the largest number of moles?

BITSAT 2017 Solution View → 12

The normality of 26 % (wt/vol) solution of ammonia (density =0.855 ) is approximately:

BITSAT 2016 Solution View → 13

1.25 ~g of a sample of Na ₂ CO ₃ and Na ₂ SO ₄ is dissolved in 250 ml solution. 25 ml of this solution neutralises 20 ml of 0.1 ~N H ₂ SO ₄ . The % of Na ₂ CO ₃ in this sample is

BITSAT 2016 Solution View → 14

Formation of polyethylene from calcium carbide takes place as follows array l CaC ₂+2 H ₂ O Ca ( OH )₂+ C ₂ H ₂ C ₂ H ₂+ H ₂ C ₂ H ₄ nC ₂ H ₄ (- CH ₂- CH ₂- )_ n array The amount o

BITSAT 2016 Solution View → 15

A compound of Xe and F is found to have 53.5 % of Xe. What is oxidation number of Xe in this compound?

BITSAT 2016 Solution View → 16

The formation of CO and CO ₂ illustrates the law of

BITSAT 2014 Solution View → 17

3.92 ~g of ferrous ammonium sulphate react completely with 50 ml N 10 KMnO ₄ solution. The percentage purity of the sample is

BITSAT 2014 Solution View → 18

How many grams of concentrated nitric acid solution should be used to prepare 250 ~mL of 2.0 MHNO ₃ ? The concentrated acid is 70 % HNO ₃

BITSAT 2013 Solution View → 19

Equal weights of NaCl and KCl are dissolved separately in equal volumes of solutions. Molarity of the two solutions will be :

BITSAT 2013 Solution View → 20

Number of atoms of He in 100 amu of He(atomic wt. of He is 4) are:

BITSAT 2012 Solution View → 21

In the reaction of KMnO ₄ with an oxalate in acidic medium, MnO ₄⁻ is reduced to Mn ²⁺ and C ₂ O ₄²⁻ is oxidised to CO ₂ . Hence, 50 ~mL of 0.02 M KMnO ₄ is equivalent to

BITSAT 2012 Solution View → 22

The product of atomic weight and specific heat of any element is a constant, approximately 6.4 . This is known as:

BITSAT 2011 Solution View → 23

The vapour density of ozone is

BITSAT 2010 Solution View → 24

Given the numbers : 161 ~cm , 0.161 ~cm , 0.0161 ~cm . The number of significant figures for the three numbers are

BITSAT 2009 Solution View →

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