📘 Acids, Bases and Salts📚 Physical Properties of Acids

Q1

What element is found in all acids?

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📘 Metallurgy📚 Metals and Their Ores

Q2

Which ore is extracted from the 'Badam Pahar' mines in Odisha?

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📘 Physical States of Matter and Their properties📚 Bose Einstein Condensate

Q3

What is the state of kinetic energy in a Bose-Einstein condensate?

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📘 Chemical Reactions📚 Exothermic Reaction

Q4

For the exothermic reaction 2SO2 + O2 ⇌ 2SO3, which conditions favor the forward reaction?

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📘 Classification of Matter on the basis of Chemical Properties- I📚 Pure Substance- Compound

Q5

Which of the following statements is false?

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📘 Acids, Bases and Salts📚 Types of Indicators- Natural, Synthetic and Olfactory Indicators

Q6

Regarding the indicator methyl orange, which of the following statements is true?

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📘 Atomic Models📚 Niels Bohr's Atomic Model

Q7

What is the change in angular momentum when an electron in a hydrogen atom jumps from the first orbit to the second?

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📘 Metallurgy📚 Alloys and Their compositions

Q8

Bronze medal is a mixture of-

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📘 Solution📚 Colloid and its types

Q9

Alum cleans muddy water by which process?

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📘 Important Chemical Compounds📚 Sulphuric Acid

Q10

What does copper turning liberate on heating with conc H2SO4?

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📘 Periodic Properties📚 Electronegativity

Q11

In the following elements, the least electronegativity is of:

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📘 Separation of Mixtures📚 Misc

Q12

Which of the following is a method to separate immiscible liquids?

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📘 Organic Chemistry📚 Misc

Q13

Which of the following is non-reducing sugar?

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📘 Polymer📚 Nylon

Q14

Which of the following polymer is formed by condensation polymerization mechanism?

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📘 Environmental Chemistry📚 Ozone Depletion

Q15

Which one of the following gas is harmful for the Ozone layer?

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📘 Corrosion📚 Copper Corrosion

Q16

Copper objects lose their shine and form green coating of-

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📘 Phase Changing Processes and Their Factors📚 Deposition

Q17

Change of gaseous state directly to solid state without going through liquid state is called-

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📘 Important Chemical Compounds📚 Washing Soda

Q18

Name the sodium compound, which is used for softening hard water.

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📘 Chemistry in Everyday Life📚 Medicines (Antacids, Analgesics, etc.)

Q19

The most widely used antipyretic is-

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📘 Phase Changing Processes and Their Factors📚 Boiling or Vaporization

Q20

The boiling point of water in Celsius is-

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Chemistry - MOST IMPORTANT Bihar Police SI Previous Year Questions