Chemistry - MOST IMPORTANT DFCCIL MTS Previous Year Questions
Practice real questions from previous year exams of DFCCIL MTS.
📘 Important Chemical Compounds📚 Baking Soda
Q1
In the preparation of baking soda, which of the following chemicals reacts with sodium chloride?
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📘 Organic Chemistry📚 Alcohol
Q2
Select the option that is true regarding the following two statements labelled Assertion and Reason.
Assertion: The chemical properties of CH3OH, C2H5OH, C3H7OH and C4H9OH are all very similar.
Reason: CH3OH, C2H5OH, C3H7OH and C4H9OH are members of homologous series.
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📘 Solution📚 Suspension
Q3
Which of the following is NOT a characteristic of a suspension?
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📘 Organic Chemistry📚 Aldehyde, Ketone and Carboxylic Acid
Q4
What is the common name of ethanoic acid and what is its 5-8% solution in water called?
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📘 Acids, Bases and Salts📚 Types of Indicators- Natural, Synthetic and Olfactory Indicators
Q5
Which of the following substances is used to extract litmus solution for an acid-base indicator?
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📘 Acids, Bases and Salts📚 Neutralization Reaction
Q6
Consider the statements about neutralisation reactions given below.
(I) When a strong acid reacts with a strong base, the reaction always produces a salt and water, resulting in a solution with a pH of 7.
(II) When a weak acid reacts with a strong base, the reaction is still called a neutralisation reaction, but the resulting solution is not neutral (pH ≠ 7).
Which of the given statements is/are correct?
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📘 Important Chemical Compounds📚 Bleaching Powder
Q7
Which of the following statements is/are true for bleaching powder?
i. Bleaching powder is represented as CaOCl2.
ii. Bleaching powder is used to make drinking water free from germs.
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📘 Organic Chemistry📚 Hydrocarbons
Q8
Methane is widely used as a fuel and is a major component of:
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📘 Organic Chemistry📚 Hydrocarbons
Q9
Which of the following options correctly classifies the cyclic carbon compounds C6H6 and C6H12 as saturated or unsaturated?
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📘 Acids, Bases and Salts📚 Types of Salts -Acidic, Basic, etc.
Q10
Which one of the following substances, when added to water, will not change the pH?
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📘 Oxidation and Reduction📚 Redox Reaction
Q11
Identify a redox reaction.
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📘 Classification of Elements in Modern Periodic Table📚 Periods and Groups
Q12
What will be the atomic number of an element X which is placed in period 2 and group 17?
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📘 Periodic Table📚 Mendeleev Periodic Table
Q13
How many elements were known when Mendeleev started his work?
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📘 Periodic Properties📚 Electronegativity
Q14
Which block elements are less electropositive in modern periodic table ?
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📘 Pure Substance- Element-Classification of Matter on the basis of Chemical Properties- II📚 Metalloids
Q15
Identify the element that is NOT a metalloid.
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