Home
📝 TNPSC
📖 TNPSC Study
📊 Maths
🚆 RRB
🏆 Tournament
LIVE
👥 Groups
⋯ More
▾
💼 Jobs
📚 Notes
📄 Docs
📋 OMR Tests
Login
Register Free
🎯 Quiz Universe
Login
✕
👤
Welcome!
Login to access all features
Free Platform
TNPSC Prep
Main Menu
🏠
Home
📝
TNPSC
📖
TNPSC Study Module
24-WK
📊
Maths Tests
⚡
Maths Practice
🚆
RRB Exams
💼
Job Alerts
📚
Study Notes
📄
Documents
📋
OMR Tests
🏆
Tournament
LIVE
🥇
Leaderboard
👥
Study Groups
Account
🔐
Login
✏️
Register Free
Info
❓
Help & Support
NEW
ℹ️
About Us
📬
Contact Us
🔒
Privacy Policy
📋
Terms & Conditions
⚠️
Disclaimer
Chemistry — Elements, Acids, Bases, Salts
32:00
1
📋 Questions
✕
Answered
Current
Unanswered
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
01. What does the Atomic Number represent?
A
Number of neutrons
B
Number of protons
C
Number of electrons + neutrons
D
Mass number
02. Who discovered the electron?
A
Ernest Rutherford
B
James Chadwick
C
J.J. Thomson
D
Niels Bohr
03. Who discovered the neutron?
A
J.J. Thomson
B
James Chadwick
C
Ernest Rutherford
D
Marie Curie
04. Who first introduced the Periodic Table?
A
Antoine Lavoisier
B
Dmitri Mendeleev
C
Niels Bohr
D
John Dalton
05. How many Periods are there in the modern Periodic Table?
A
6
B
7
C
8
D
9
06. Which of the following is a metalloid?
A
Iron
B
Oxygen
C
Silicon
D
Copper
07. The Mass Number is the sum of which particles?
A
Protons + Electrons
B
Protons + Neutrons
C
Neutrons + Electrons
D
Protons only
08. What is the chemical symbol for Carbon?
A
Ca
B
Co
C
C
D
Cr
09. What ion do acids release when dissolved in water?
A
OH⁻
B
H⁺
C
Na⁺
D
Cl⁻
10. What effect do acids have on blue litmus paper?
A
Turn it blue
B
Turn it red
C
No change
D
Turn it green
11. Which acid is found in lemon?
A
Acetic acid
B
Lactic acid
C
Citric acid
D
Tartaric acid
12. Which acid is found in vinegar?
A
Citric acid
B
Acetic acid
C
Lactic acid
D
Oxalic acid
13. Which acid is present in the gastric juice of the human stomach?
A
Sulphuric acid
B
Nitric acid
C
Hydrochloric acid
D
Acetic acid
14. Which acid is found in curd (yogurt)?
A
Lactic acid
B
Citric acid
C
Tartaric acid
D
Benzoic acid
15. Which of the following is a strong acid?
A
Acetic acid
B
Citric acid
C
Sulphuric acid
D
Carbonic acid
16. What ion do bases release when dissolved in water?
A
H⁺
B
OH⁻
C
Na⁺
D
SO₄²⁻
17. Which chemical is known as caustic soda?
A
KOH
B
NaOH
C
Ca(OH)₂
D
NH₄OH
18. Milk of magnesia is used for which purpose?
A
Soap manufacturing
B
As an antacid medicine
C
Fertilizer production
D
Electroplating
19. What effect do bases have on red litmus paper?
A
Turn it red
B
Turn it blue
C
No change
D
Turn it yellow
20. What is the range of the pH scale?
A
0–10
B
0–14
C
1–7
D
0–100
21. What does pH = 7 indicate?
A
Strong acid
B
Strong base
C
Neutral
D
Mild acid
22. Who introduced the pH scale?
A
Dmitri Mendeleev
B
Søren Sørensen
C
John Dalton
D
Robert Boyle
23. Which base is known as lime water?
A
NaOH
B
KOH
C
Ca(OH)₂
D
NH₄OH
24. What is the reaction called when an acid and a base react to form a salt and water?
A
Oxidation reaction
B
Neutralization reaction
C
Reduction reaction
D
Decomposition reaction
25. What is the chemical name of baking soda?
A
Sodium carbonate
B
Sodium bicarbonate
C
Calcium carbonate
D
Potassium carbonate
26. Which salt is known as washing soda?
A
NaHCO₃
B
Na₂CO₃
C
NaCl
D
CaCO₃
27. What is the chemical name of Plaster of Paris?
A
Calcium carbonate
B
Calcium sulphate hemihydrate
C
Calcium oxide
D
Calcium chloride
28. What is the pH of the salt formed when a strong acid reacts with a strong base?
A
pH < 7
B
pH = 7
C
pH > 7
D
pH = 0
29. Which chemical is known as saltpetre?
A
Potassium nitrate
B
Sodium chloride
C
Copper sulphate
D
Calcium sulphate
30. Which salt is known as blue vitriol?
A
Copper sulphate
B
Sodium chloride
C
Potassium nitrate
D
Magnesium sulphate
31. Alum is an example of which type of salt?
A
Normal salt
B
Acidic salt
C
Basic salt
D
Double salt
32. What are the products of the reaction HCl + NaOH?
A
NaCl + H₂O
B
Na₂SO₄ + H₂O
C
NaCl + H₂
D
NaOH + HCl
0
Done
32
Left
32
Total
Submit Test
✅
Submit Quiz?
Once submitted you cannot change your answers.
0
Answered
0
Skipped
32
Total
Review
Submit Now
Home
TNPSC
Contest
RRB
Tests
Login
🔒
Login required
Please login to access the test series and start attempting tests.
🔐 Login & Continue
Maybe later