📘 Phase Changing Processes and Their Factors📚 Evaporation

Q1

By which of the following processes does water change from liquid state to gaseous state?

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📘 Atomic Models📚 Dalton's Atomic Theory

Q2

The modern atomic theory was prepared by:

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📘 Acids, Bases and Salts📚 pH Scale

Q3

Our body works within ___ pH range.

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

Q4

Litmus solution is a purple dye, which is obtained from _______.

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📘 Acids, Bases and Salts📚 pH Scale

Q5

The pH of pure water is closest to:

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📘 Mole Concept📚 Mole

Q6

How many moles of ammonia are present in 51 g ammonia?

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📘 Classification of Elements in Modern Periodic Table📚 Periods and Groups

Q7

In the modern periodic table, which period contains five non-metals?

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📘 Organic Chemistry📚 Other functional groups

Q8

An amino acid with more COOH groups than NH₂ groups is called a/an ________ amino acid.

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📘 Acids, Bases and Salts📚 Name of Acid present in compounds

Q9

The acid found in lemon is

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📘 Carbon Allotropes📚 Carbon Allotrope (Crystalline)

Q10

The element used in a lead-pencil is

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📘 Important Chemical Compounds📚 Washing Soda

Q11

Washing soda is :

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📘 Important Chemical Compounds📚 Gypsum

Q12

Calcium sulfate (anhydrous) is also known as:

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📘 Chemistry in Everyday Life📚 Misc

Q13

What is used for artificial rain?

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📘 Chemical Reactions📚 Single Displacement Reaction

Q14

Which of the following elements can displace copper from its compounds?

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📘 Pure Substance- Element-Classification of Matter on the basis of Chemical Properties- II📚 Metals and its properties

Q15

Which of the following metals are the most malleable?

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📘 Metallurgy📚 General Facts

Q16

Which of the following metals was first used by humans?

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📘 Polymer📚 Rayon

Q17

Which synthetic fiber is known as artificial silk?

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

Q18

Which type of glass is heat resistant?

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Chemistry - MOST IMPORTANT UPSSSC Sugarcane Supervisor Previous Year Questions