Daily Practice Problems
JEE Chemistry
Some Basic Concepts of Chemistry
JEE Chemistry
Some Basic Concepts of Chemistry
Question 1.
A given solution of NaOH contains 8g of NaOH per litre of solution. Calculate the molarity of this solution. [Level: Easy]
(a) 0.2M
(b) 0.02M
(c) 0.5M
(d) 2M
Question 2.
A mixture of KBr and NaBr weighing 0.6201g was treated with aq Ag+ and all the bromine ion was recovered as 0.94g of pure AgBr. What was the fraction by weight of KBr in the sample. [Level: Easy]
(a) 3.101
(b) 1.260
(c) 0.260
(d)0.0260
Question 3.
1g of a sample of CaCO3 was strongly heated and the CO2 liberated was absorbed in 100ml of 0.5M NaOH solution. Assuming 94% purity for the sample, how many ml of 0.5M HCl would be required to react with the resulting solution to reach the end point in the presence of phenolphthalein?
[Level: Moderate]
(a) 
(b) 
(c) 
(d) 
Question 4.
Calculate number of electrons present in 19.0g of PO3-4. [Level: Easy]
(a) 8NA
(b) 5NA
(c) 20NA
(d) 10NA
Question 5.
A 15mm x 30mm piece of gold foil is 0.20 mm thick. The density of gold is 19.32 g/cm3.How many golds atom is in the sheet? [Level: Moderate]
(a) 
(b) 
(c) 
(d) 
Question 6.
From 160mg of O2, 1019 Molecules are removed. How many moles of O2 are left [Level: Easy]
(a) 5 × 10-3
(b) 1.2 × 103
(c) 4. 98 × 10-3
(d) 2.41 × 10-13
Question 6.
1.96g of a mixture of CaCO3 and MgCO3 was heated to a constant weight. The constant weight of the residue was found to be 1.25g. Calculate the percentage composition of the mixture. [Level: Hard]
(a) CaCO3 and MgCO3 is 70% and 30% Respectively
(b) CaCO3 and MgCO3 is 51% and 49% Respectively
(c) CaCO3 and MgCO3 is 27% and 73% Respectively
(d) CaCO3 and MgCO3 is 35% and 65% Respectively
Question 7.
Which has the maximum number of molecules? [Level: Easy]
(a) 1.7 g NH3
(b) 9.8g of H2SO4
(c) 4.6g of CO2
(d) 4g of H2
Question 8.
The number of protons in 9g of K2SO4 is: [Level: Easy]
(a) 9.1 x 1019
(b) 2.67 x 1024
(c) 4.67 x 1023
(d) 3.107 x 1022
Question 9.
What is the percentage of free SO3 in a Oleum sample that is labelled as 106.2% H2SO4? [Level: Moderate]
(a) 18%
(b) 30%
(c) 45%
(d) 28%
Question 10.
Given that density of HCl is 1.2gml-1 at 250C. what is the density in Kgm-3 [Level: Easy]
Question 11.
The equivalent weight of Na3PO4.12H2O is _____. [Level: Easy]
(Assume that Formula weight of the compound is A)
Question 12.
2.16g of copper metal when treated with nitric acid followed by ignition of the nitrite gave 2.70g of copper oxide. The another experiment 1.15g of Copper oxide upon reduction with hydrogen gave 0.92g of copper. Can you tell this If it is obeying Law of definite proportions or not[Level: Hard]
Question 13.
Temperature dependent term is – [Level: Easy]
(a) Molarity
(b) Molality
(c) Mass percentage
(d) Mole fraction
Question 14.
Calculate the percentage of cation in ammonium dichromate. [Level: Hard]
(a) 5.67%
(b) 23.1%
(c) 14.29%
(d) None of these
Question 15.
The father was teaching chemistry to his son then he asked, what if 8g carbon were heated with 16g sulphur. How much carbon disulphide will be formed when the reaction is complete and calculate the percentage purity. [Level: Moderate]
Question 16.
Volume of 0.1 mole of gas at NTP will be [Level: Easy]
(a) 22.4L
(b) 2.24L
(c) 0.224
(d) 22400L
Question 17.
Sometimes during a chemical reaction loss in mass occurs. Which of the following law oppose it: [Level: Easy]
(a) Constant proportion
(b) Multiple proportion
(d) Equivalent proportion
Question 18.
How much potassium chlorate should be heated to produce 2.24L of oxygen at NTP? [Level: Moderate]
Question 19.
Calculate the price of salt and sugar is Rs.17 per Kg and Rs. 40 per Kg then calculate the price of their 1 mole. [Level: Hard]
Question 20.
In dibasic acid, C = 26.7%, H = 2.2% and O = 71.1% are present. Molecular mass of an acid is 90. Calculate the Empirical and molecular formula. [Level: Moderate]
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Practicing questions plays a pivotal role in achieving excellence in exams. Just as the adage goes, "Practice makes perfect," dedicating time to solve a diverse range of exam-related questions yields manifold benefits. Firstly, practicing questions allows students to familiarize themselves with the exam format and types of problems they might encounter. This familiarity instills confidence, reducing anxiety and improving performance on the actual exam day. Secondly, continuous practice sharpens problem-solving skills and enhances critical thinking, enabling students to approach complex problems with clarity and efficiency. Thirdly, it aids in identifying weak areas, allowing students to focus their efforts on improving specific topics. Moreover, practice aids in memory retention, as active engagement with the material reinforces learning. Regular practice also hones time management skills, ensuring that students can allocate appropriate time to each question during the exam. Overall, practicing questions not only boosts exam performance but also instills a deeper understanding of the subject matter, fostering a holistic and effective learning experience.
All About Daily Practice Problems on JEE Chemistry Some Basic Concepts of Chemistry NCERT Chapter 1
Our Daily Practice Problems (DPPs) offer a diverse range of question types, including Multiple Choice Questions (MCQs) as well as short and long answer types. These questions are categorized into Easy, Moderate, and Difficult levels, allowing students to gradually progress and challenge themselves accordingly. Additionally, comprehensive solutions are provided for each question, available for download in PDF format - Download pdf solutions as well as Download pdf Questions. This approach fosters a holistic learning experience, catering to different learning styles, promoting self-assessment, and improving problem-solving skills. With our well-structured DPPs, students can excel in exams while gaining a deeper understanding of the subject matter. Hope you found the content on JEE Chemistry Some Basic Concepts of Chemistry NCERT Chapter 1 useful.
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