Chemistry - MOST IMPORTANT Haryana PCS Previous Year Questions
Practice real questions from previous year exams of Haryana PCS.
📘 Chemistry in Everyday Life📚 Common Gases used in daily life (LPG, CNG, etc.)
Q1
Consider the following statements:
Statement-I : Hydrogen is considered as a clean automobile fuel for future.
Statement-II : Hydrogen is the most abundant element in the universe.
In the light of the above statements, choose the correct answer from the options given below:
🎯 Haryana PCS (Pre) 2023
📘 Chemistry in Everyday Life📚 Common Gases used in daily life (LPG, CNG, etc.)
Q2
Liquefied petroleum gas (LPG) is the mixture of the following-
🎯 Haryana PCS (Pre) 2014
📘 Acids, Bases and Salts📚 Types of Indicators- Natural, Synthetic and Olfactory Indicators
Q3
Consider the following statements regarding olfactory indicators: (1) The characteristic smell of onion is lost upon adding NaOH, however it persists with HCl. (2) The characteristic smell of vanilla is lost upon addition of HCl, however it persists with NaOH. (3) The characteristic smell of clove oil is lost upon addition of NaOH in it. How many of the statements are correct?
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📘 Acids, Bases and Salts📚 Physical Properties of Base
Q4
Consider the following statements:
1. Alkali is a base that dissolve in water.
2. Ca(OH)2 is not an example of alkali.
3. Dissolution of a base in water is an exothermic process.
How many of the statements given above are correct?
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📘 Acids, Bases and Salts📚 Name of Acid present in compounds
Q5
Consider the following pairs:
1. Acid left by bee sting of honey bee : HCl
2. Atmosphere of Venus : H2SO4
3. Antacid : Methanoic Acid
How many of the above pairs are correct matched?
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📘 Environmental Chemistry📚 Acid Rain
Q6
Consider the following statements:
1. When pH of rain water lies in the range of 6 to 7, it is called acid rain.
2. Tooth enamel starts to corrode when pH of mouth is greater than 7.
3. Under acidic conditions farmers would treat the soil with quick lime.
How many of the statement given above are correct?
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📘 Acids, Bases and Salts📚 Neutralization Reaction
Q7
Consider the following statements:
Statement-I : The effect of ant bite can be neutralised by rubbing calamine solution.
Statement-II : Calamine solution contains zinc carbonate which is basic in nature.
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📘 Acids, Bases and Salts📚 pH Scale
Q8
The substance with pH less than 7 are: 1. Gastric juices, 2. Coffee, 3. Apple juices, 4. Liquid in the car battery
🎯 Haryana PCS (PRE) 2021
📘 Radioactivity📚 General Facts
Q9
Which is the most common isotope of uranium found in nature;
🎯 Haryana PCS Pre 2014
📘 Important Chemical Compounds📚 Washing Soda
Q10
Which of the following statements are true about washing soda?
1. Its chemical name is sodium hydrogencarbonate and its aqueous solution is basic in nature.
2. Its chemical name is sodium carbonate and the pH of its aqueous solution is more than 7.
3. It is used for raising of cakes while baking.
4. It is used for the removal of permanent hardness of water.
Select the correct answer using the code given below :
🎯 Haryana PCS (PRE) 2021
📘 Important Chemical Compounds📚 Slaked lime
Q11
This compound is conventionally used for white washing of buildings. Which of the following statements is/are true about it?
1. It is obtained by treating quick lime with water.
2. It is produced when calcium carbide reacts with water.
3. It is one of the raw materials used for the manufacture of Portland cement.
4. It is called slaked lime and its chemical formula is Ca(OH)2.
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📘 Chemistry in Everyday Life📚 Cleansing Agents (Soaps and Detergents)
Q12
Which of the following statements about the types of soaps is/are TRUE?
1. Transparent soaps are made by dissolving the soap in ethanol and then evaporating the excess solvent.
2. Shaving soaps contain fillers like sodium rosinate, sodium silicate, borax and sodium carbonate.
3. Soap chips are made by running a thin sheet of melted soap onto a cool cylinder and scraping off the soaps in small broken pieces.
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📘 Organic Chemistry📚 Aldehyde, Ketone and Carboxylic Acid
Q13
Which of the following groups of organic compounds are least likely to be used in making of perfumes?
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📘 Chemistry in Everyday Life📚 Medicines (Antacids, Analgesics, etc.)
Q14
Match List I (Chemical Compounds) with List II (Usage): List-I: (A) Norethindrone (B) Alitame (C) Cetyltrimethylammonium Bromide (D) Phenelzine. List-II: (1) Cationic detergent (2) Antifertility drug (3) Artificial Sweetener (4) Anti depressant drug.
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📘 Important Chemical Compounds📚 Quick lime
Q15
Consider the following pairs:
1. Quick lime : Manufacture of Cement
2. Slaked lime : Preparation of Soap
3. Plaster of Paris : Making Toys
How many of the above pairs are correctly matched?
🎯 Haryana PCS (Pre) 2023