📌Here are 10 important one-liners on Atoms and Molecules — crisp and exam-friendly 👌
1. An atom is the smallest particle of an element that retains its chemical properties.
2. A molecule is formed when two or more atoms chemically combine.
3. Law of Conservation of Mass states that mass is neither created nor destroyed in a chemical reaction.
4. Dalton’s Atomic Theory explains that all matter is made up of indivisible atoms.
5. Atomic mass is the average mass of an atom compared to 1/12th the mass of a carbon-12 atom.
6. Molecular mass is the sum of atomic masses of all atoms present in a molecule.
7. A mole is the amount of substance containing 6.022 \times 10^{23} particles.
8. Avogadro’s number represents the number of atoms or molecules in one mole of a substance.
9. Chemical formula shows the types and number of atoms present in a molecule.
10. Compounds are substances formed by the chemical combination of two or more elements in a fixed ratio.

*Combined Test (80 MCQs) in proper exam format —*

*👉Date- 10 feb 2026*

📘 FULL LENGTH TEST

Acid–Base–Salt (Class 10) + Introduction to India Geography (Class 9)

Time: 60 Minutes  Max Marks: 80

Name: ________________  Roll No.: ________  Date: ________

Instructions:
1. All questions are compulsory.
2. Each question carries 1 mark.
3. Choose the correct option (A/B/C/D).
4. No negative marking.

⸻

Section A — Chemistry (Acids, Bases & Salts)

Q1–Q40
1. An acid is a substance that produces:
A. OH⁻ ions B. H⁺ ions C. Electrons D. Salt only
2. A base produces in aqueous solution:
A. H⁺ ions B. OH⁻ ions C. CO₂ D. H₂
3. Which is a strong acid?
A. Acetic acid B. Carbonic acid C. Hydrochloric acid D. Citric acid
4. Which is a weak acid?
A. HCl B. HNO₃ C. CH₃COOH D. H₂SO₄
5. pH of neutral solution is:
A. 0 B. 7 C. 14 D. 1
6. pH 3 solution is:
A. Basic B. Neutral C. Acidic D. Salt
7. pH 12 solution is:
A. Acidic B. Neutral C. Basic D. Salt
8. Indicator turning red in acid and blue in base:
A. Phenolphthalein B. Methyl orange C. Litmus D. Turmeric
9. Phenolphthalein is colourless in:
A. Neutral B. Acidic C. Basic D. Salt
10. Turmeric becomes reddish-brown in:
A. Acid B. Base C. Water D. Salt
11. Acidic solutions conduct electricity due to:
A. Molecules B. Ions C. Metals D. Solids
12. Acids react with metals to form:
A. CO₂ B. H₂ C. O₂ D. N₂
13. Correct reaction producing hydrogen gas:
A. Acid + Metal B. Acid + Base C. Acid + Salt D. Base + Metal
14. Acid + Carbonate gives:
A. Salt + Water B. Salt + CO₂ C. Salt + Water + CO₂ D. CO₂ only
15. Gas turning lime water milky:
A. H₂ B. CO₂ C. O₂ D. NH₃
16. Neutralisation reaction is:
A. Acid + Base B. Acid + Metal C. Salt + Water D. Base + Metal
17. Antacid contains:
A. NaOH B. Mg(OH)₂ C. HCl D. H₂SO₄
18. Tooth decay starts below pH:
A. 7 B. 6 C. 5.5 D. 4
19. Acidic soil treated with:
A. Lime B. Acid C. Salt D. CO₂
20. Basic soil treated with:
A. Lime B. Organic matter C. NaOH D. Soap
21. Vinegar contains:
A. Citric acid B. Acetic acid C. Lactic acid D. Formic acid
22. Lemon contains:
A. Acetic acid B. Citric acid C. Formic acid D. Oxalic acid
23. Curd contains:
A. Lactic acid B. Nitric acid C. Sulphuric acid D. Hydrochloric acid
24. Ant sting contains:
A. Citric acid B. Formic acid C. Lactic acid D. Oxalic acid
25. Bases feel:
A. Sour B. Bitter & soapy C. Sweet D. Neutral
26. Basic oxide is:
A. CO₂ B. SO₂ C. MgO D. NO₂
27. Acidic oxide is:
A. CaO B. Na₂O C. CO₂ D. MgO
28. Salt giving acidic solution formed from:
A. Strong acid + Strong base
B. Weak acid + Strong base
C. Strong acid + Weak base
D. Weak acid + Weak base
29. Common salt obtained from:
A. Neutralisation only
B. Sea water
C. Limestone heating
D. CO₂ reaction
30. Bleaching powder formula:
A. CaCl₂ B. CaOCl₂ C. NaClO D. CaCO₃
31. Bleaching powder prepared from:
A. CaCO₃ B. Ca(OH)₂ C. NaOH D. Mg(OH)₂
32. Baking soda is:
A. Na₂CO₃ B. NaHCO₃ C. CaCO₃ D. NH₄Cl
33. Washing soda is:
A. Na₂CO₃·10H₂O B. NaHCO₃ C. CaSO₄·2H₂O D. NaCl
34. Plaster of Paris is:
A. CaSO₄·2H₂O B. CaSO₄·½H₂O C. CaCO₃ D. CaCl₂
35. Common salt is:
A. NaHCO₃ B. Na₂CO₃ C. NaCl D. KClO₃
36. Gypsum is:
A. CaSO₄·2H₂O B. CaSO₄·½H₂O C. CaO D. CaCl₂
37. Used in glass, soap, paper industry:
A. Baking soda B. Washing soda C. Bleaching powder D. POP
38. Acid in water explained by:
A. Arrhenius B. Boyle C. Newton D. Avogadro
39. Dilution of acid means:
A. Acid + Acid B. Acid + Base C. Acid + Water D. Acid + Salt
40. Correct dilution method:
A. Water into acid B. Acid into water C. Fast mixing D. None

⸻

Section B — Geography (Introduction to India)

Q41–Q80
41. India lies in:
A. Northern Hemisphere B. Southern C. Eastern D. Northern & Eastern
42. Latitudinal extent:
A. 0°–23½°N B. 8°4′N–37°6′N C. 10°–40°N D. 15°–30°N
43. Longitudinal extent:
A. 68°7′E–97°25′E B. 60°–90°E C. 70°–100°E D. 75°–95°E
44. Tropic of Cancer passes through:
A. South India B. Middle India C. North India D. Coast only
45. Tropic of Cancer latitude:
A. 0° B. 23½°N C. 66½°N D. 90°
46. Standard Meridian of India:
A. 82½°E B. 90°E C. 75°E D. 0°

47. IST ahead of GMT by:
A. 4 hrs B. 5 hrs C. 5½ hrs D. 6 hrs
48. East–west extent:
A. 1000 km B. 2000 km C. 2933 km D. 5000 km
49. North–south extent:
A. 3214 km B. 2933 km C. 1500 km D. 5000 km
50. India’s area:
A. 1.5 million B. 2.4 million C. 3.28 million D. 4.5 million sq km
51. India rank by area:
A. 5th B. 6th C. 7th D. 8th
52. Coastline length:
A. 6100 km B. 7516 km C. 8000 km D. 9500 km
53. Number of states:
A. 27 B. 28 C. 29 D. 30
54. Number of UTs:
A. 6 B. 7 C. 8 D. 9
55. Southernmost point of India:
A. Indira Point B. Kanyakumari C. Rameswaram D. Minicoy
56. Southernmost mainland point:
A. Indira Point B. Kanyakumari C. Port Blair D. Lakshadweep
57. Bay of Bengal islands:
A. Lakshadweep B. Andaman & Nicobar C. Maldives D. Sri Lanka
58. Arabian Sea islands:
A. Andaman B. Lakshadweep C. Java D. Fiji
59. Indian Ocean lies to:
A. North B. South C. East D. West
60. Arabian Sea lies to:
A. East B. West C. North D. South
61. Bay of Bengal lies to:
A. East B. West C. North D. South
62. India shares land border with:
A. 5 B. 6 C. 7 D. 8 countries
63. Himalayas act as:
A. Desert barrier B. Mountain barrier C. Coastal barrier D. River barrier
64. Northern Plains formed by:
A. Wind B. Lava C. Alluvial deposits D. Glaciers only
65. Peninsular Plateau made of:
A. Young mountains B. Old rocks C. Sand dunes D. Coral
66. Thar Desert located in:
A. J&K B. Rajasthan C. Assam D. Kerala
67. Indian desert called:
A. Sahara B. Great Indian Desert C. Gobi D. Kalahari
68. Central location helps in:
A. Volcanoes B. Trade routes C. Earthquakes D. Desert
69. Narrow land link to NE India:
A. Khyber B. Siliguri Corridor C. Bolan D. Karakoram
70. India–Sri Lanka separated by:
A. Gulf of Kutch B. Palk Strait C. Malacca D. Gibraltar
71. Highest peak (India commonly taught):
A. K2 B. Kanchenjunga C. Everest D. Nanda Devi
72. Physical divisions of India:
A. 3 B. 4 C. 6 D. 8
73. Coastal Plains located along:
A. East B. West C. Both D. South only
74. Lakshadweep islands origin:
A. Volcanic B. Coral C. River D. Glacial
75. Andaman & Nicobar origin:
A. Coral B. Volcanic/Tectonic C. River D. Desert
76. Standard Meridian passes near:
A. Kolkata B. Mirzapur C. Mumbai D. Chennai
77. Time difference in India due to:
A. Latitude B. Longitude C. Rainfall D. Altitude
78. India mainly has:
A. Polar climate B. Tropical monsoon C. Desert only D. Equatorial only
79. India called subcontinent due to:
A. Small size B. Large size & diversity C. Island D. Desert
80. Indian Ocean named after:
A. Sri Lanka B. Maldives C. India D. Indonesia

Here is the Answer Key (Q1–Q80) for the combined test:

Section A — Chemistry (Q1–Q40)
1-B
2-B
3-C
4-C
5-B
6-C
7-C
8-C
9-B
10-B
11-B
12-B
13-A
14-C
15-B
16-A
17-B
18-C
19-A
20-B
21-B
22-B
23-A
24-B
25-B
26-C
27-C
28-C
29-B
30-B
31-B
32-B
33-A
34-B
35-C
36-A
37-B
38-A
39-C
40-B

Section B — Geography (Q41–Q80)
41-D
42-B
43-A
44-B
45-B
46-A
47-C
48-C
49-A
50-C
51-C
52-B
53-B
54-C
55-A
56-B
57-B
58-B
59-B
60-B
61-A
62-C
63-B
64-C
65-B
66-B
67-A
68-C
69-B
70-B
71-B
72-B
73-Both A and B
74-B
75-A
76-B
77-B
78-B
79-B
80-C

*🕹️Mole concept MCQs*

🧿If 12 gram of carbon has x atoms, then the number of atoms in 12 grams of magnesium will be:
a) x
b) 2x
c) x/2
d) 1.5 x

🧿Which of the following correctly represents
360 gram of water ?
i 2 moles of H, ii) 20 moles of water iii) 6.022 × 1023 molecules of water
iv) 1.2044 × 1025 molecules of water
(i) Only
(i) and (iv)
(ii) and (iii)
(ii) and (iv)


🧿THE MASS OF ONE MOLECULE OF A SUBSTANCE IS 4.65 * 10-23 G. WHAT IS ITS MOLECULAR MASS ? WHAT COULD THIS SUBSTANCE BE ?

🧿THE MASS OF ONE MOLECULE OF A SUBSTANCE IS 5.3138 * 10-23 G. WHAT IS ITS MOLECULAR MASS ? WHAT COULD THIS SUBSTANCE BE ?


🧿WHICH CONTAINS MORE MOLECULES, 10 G OF SULPHUR DIOXIDE (SO2) OR 10 G OF
OXYGEN (O2) ? (ATOMIC MASSES : S = 32 U ;
0 = 16 U)

Here are the correct answers with short explanations 👇

⸻

🧿 Q1. If 12 gram of carbon has x atoms, then the number of atoms in 12 grams of magnesium will be:
• Atomic mass of C = 12 u → 12 g = 1 mole
• Atomic mass of Mg = 24 u → 12 g = 0.5 mole

So, atoms in 12 g Mg = ½ of x

✅ Correct answer: (c) x/2

⸻

🧿 Q2. Which of the following correctly represents 360 g of water?
• Molar mass of H₂O = 18 g/mol
• 360 g ÷ 18 g/mol = 20 moles of water

Now check statements:

i) 2 moles of H → ❌ incorrect
ii) 20 moles of water → ✅ correct
iii) 6.022 × 10²³ molecules → ❌ (that is 1 mole)
iv) 20 × 6.022 × 10²³ = 1.2044 × 10²⁵ molecules → ✅ correct

✅ Correct answer: (ii) and (iv)

⸻

🧿 Q3. Mass of one molecule = 4.65 × 10⁻²³ g

Find molecular mass & substance

Molecular mass =
4.65 × 10^{-23} × 6.022 × 10^{23}

= 28 g/mol

A substance with molecular mass 28 is Nitrogen (N₂)

✅ Answer:
• Molecular mass = 28 g/mol
• Substance = Nitrogen (N₂)

⸻

🧿 Q4. Mass of one molecule = 5.3138 × 10⁻²³ g

Molecular mass =
5.3138 × 10^{-23} × 6.022 × 10^{23}

= 32 g/mol

A substance with molecular mass 32 is Oxygen (O₂)

✅ Answer:
• Molecular mass = 32 g/mol
• Substance = Oxygen (O₂)

⸻

🧿 Q5. Which contains more molecules:

10 g SO₂ or 10 g O₂ ?
• Molar mass of SO₂ = 32 + (16×2) = 64 g/mol
• Moles of SO₂ = 10/64 = 0.15625 mol
• Molar mass of O₂ = 32 g/mol
• Moles of O₂ = 10/32 = 0.3125 mol

More moles = more molecules

✅ Correct answer: 10 g of Oxygen (O₂)

⸻

📌Information regarding ports of india

Here are 30 MCQs on Land Utilization and Agriculture of India

⸻
👇👇👇👇👇👇👇👇👇👇

1. Land that is used for growing crops is called:
(A) Barren land
(B) Cultivable land
(C) Waste land
(D) Forest land

2. The total land area of India is approximately:
(A) 2.5 million sq km
(B) 3.28 million sq km
(C) 4.5 million sq km
(D) 5.2 million sq km

3. Land which cannot be used for cultivation is known as:
(A) Fallow land
(B) Barren and waste land
(C) Net sown area
(D) Cultivable waste land

4. Land left uncultivated for one or more agricultural years is called:
(A) Pasture land
(B) Fallow land
(C) Forest land
(D) Plantation land

5. The area sown with crops more than once in a year is known as:
(A) Net sown area
(B) Gross cropped area
(C) Fallow land
(D) Waste land

6. Which of the following is the main occupation of the people of India?
(A) Mining
(B) Agriculture
(C) Fishing
(D) Trade

7. Land used for grazing animals is called:
(A) Pasture land
(B) Forest land
(C) Barren land
(D) Plantation land

8. The land which is suitable for cultivation but not used for crops is called:
(A) Cultivable waste land
(B) Forest land
(C) Net sown area
(D) Permanent pasture

9. Which season is known as the main cropping season in India?
(A) Winter season
(B) Summer season
(C) Kharif season
(D) Spring season

10. Crops that are sown in June–July and harvested in September–October are called:
(A) Rabi crops
(B) Kharif crops
(C) Zaid crops
(D) Plantation crops

11. Crops that are sown in October–November and harvested in March–April are known as:
(A) Kharif crops
(B) Rabi crops
(C) Zaid crops
(D) Cash crops

12. Which of the following is a Kharif crop?
(A) Wheat
(B) Gram
(C) Rice
(D) Mustard

13. Which of the following is a Rabi crop?
(A) Rice
(B) Wheat
(C) Maize
(D) Cotton

14. The short cropping season between Rabi and Kharif is called:
(A) Zaid season
(B) Winter season
(C) Autumn season
(D) Spring season

15. Which of the following is a Zaid crop?
(A) Watermelon
(B) Wheat
(C) Rice
(D) Cotton

16. The cultivation of crops with the help of rainfall is known as:
(A) Irrigated farming
(B) Dry farming
(C) Plantation farming
(D) Mixed farming

17. The cultivation of crops with the help of artificial supply of water is called:
(A) Irrigation
(B) Terrace farming
(C) Shifting cultivation
(D) Mixed farming

18. Growing only one crop on a piece of land year after year is known as:
(A) Mixed cropping
(B) Monoculture
(C) Crop rotation
(D) Multiple cropping

19. The practice of growing two or more crops on the same land at the same time is called:
(A) Crop rotation
(B) Mixed cropping
(C) Plantation farming
(D) Dry farming

20. The practice of growing different crops in succession on the same land is called:
(A) Mixed cropping
(B) Crop rotation
(C) Plantation farming
(D) Terrace farming

21. Which type of farming is mainly practiced in hilly areas?
(A) Terrace farming
(B) Plantation farming
(C) Intensive farming
(D) Commercial farming

22. The farming in which large amounts of labour and capital are used is called:
(A) Extensive farming
(B) Intensive farming
(C) Plantation farming
(D) Shifting cultivation

23. Which crop is known as the staple food of India?
(A) Rice
(B) Wheat
(C) Maize
(D) Barley

24. Tea is mainly grown in which type of farming?
(A) Plantation farming
(B) Mixed farming
(C) Dry farming
(D) Terrace farming

25. Which factor mainly affects agriculture in India?
(A) Rainfall
(B) Temperature
(C) Soil
(D) All of these

26. The cultivation of fruits and vegetables is called:
(A) Horticulture
(B) Sericulture
(C) Pisciculture
(D) Apiculture

27. The practice of growing crops and rearing animals together is known as:
(A) Mixed farming
(B) Plantation farming
(C) Shifting cultivation
(D) Terrace farming

28. Which crop is mainly grown in black soil?
(A) Cotton
(B) Wheat
(C) Rice
(D) Barley

29. Agriculture in India mainly depends on:
(A) Monsoon rainfall
(B) River water
(C) Groundwater
(D) Canal irrigation

30. The increase in agricultural production with modern techniques is known as:
(A) Green Revolution
(B) Industrial Revolution

(C) White Revolution
(D) Blue Revolution


Ans key will be provided soon👍

Answers key of the 30 MCQs on Land Utilization and Agriculture of India:
👇👇👇👇👇👇👇👇
1. (B) Cultivable land
2. (B) 3.28 million sq km
3. (B) Barren and waste land
4. (B) Fallow land
5. (B) Gross cropped area
6. (B) Agriculture
7. (A) Pasture land
8. (A) Cultivable waste land
9. (C) Kharif season
10. (B) Kharif crops
11. (B) Rabi crops
12. (C) Rice
13. (B) Wheat
14. (A) Zaid season
15. (A) Watermelon
16. (B) Dry farming
17. (A) Irrigation
18. (B) Monoculture
19. (B) Mixed cropping
20. (B) Crop rotation
21. (A) Terrace farming
22. (B) Intensive farming
23. (A) Rice
24. (A) Plantation farming
25. (D) All of these
26. (A) Horticulture
27. (A) Mixed farming
28. (A) Cotton
29. (A) Monsoon rainfall
30. (A) Green Revolution

10 MCQs on topic Physical Features of Punjab Geo:
👉👉Day-1

1. The shape of Punjab is:
(A) Rectangular
(B) Circular
(C) Triangular
(D) Square

2. Punjab covers what percentage of the total area of India?
(A) 1.25%
(B) 1.53%
(C) 2.10%
(D) 3.50%

3. By population, Punjab ranks in India as:
(A) 10th
(B) 12th
(C) 16th
(D) 20th

4. By area, Punjab ranks in India as:
(A) 16th
(B) 18th
(C) 20th
(D) 22nd

5. The total area of Punjab is approximately:
(A) 45,000 sq km
(B) 48,000 sq km
(C) 50,362 sq km
(D) 52,000 sq km

6. The capital of Punjab is:
(A) Amritsar
(B) Ludhiana
(C) Jalandhar
(D) Chandigarh

7. The literacy rate of Punjab is:
(A) 70.24%
(B) 72.56%
(C) 75.84%
(D) 80.12%

8. The population of Punjab is approximately:
(A) 2.10 crore
(B) 2.50 crore
(C) 2.77 crore
(D) 3.10 crore

9. The current Chief Minister of Punjab is:
(A) Bhagwant Mann
(B) Partap Singh kario
(C) Rajinder kaur bhatal
(D) Gopi chand bhargav

10. The Governor of Punjab is:
(A) Banwarilal Purohit
(B) Bhagwant Mann
(C) Gulab Chand kataria
(D) Yogi Adityanath

Ans key of (Day-1 MCQs):
1. The shape of Punjab is:
👉 (C) triangular
2. Punjab covers what percentage of the total area of India?
👉 (B) 1.53%
3. By population, Punjab ranks in India as:
👉 (C) 16th
4. By area, Punjab ranks in India as:
👉 (C) 20th
5. The total area of Punjab is approximately:
👉 (C) 50,362 sq km
6. The capital of Punjab is:
👉 (D) Chandigarh
7. The literacy rate of Punjab is:
👉 (C) 75.84%
8. The population of Punjab is approximately:
👉 (C) 2.77 crore
9. The current Chief Minister of Punjab is:
👉 (A) Bhagwant Mann
10. The Governor of Punjab is:
👉 (C) Gulab Chand Kataria

⸻

Practice Sheet Day-2

🕹️10 MCQs on Majha, Doaba, Malwa & Puadh regions + Bari & Bist Doab (Punjab Geography) 👇

⸻

📘 MCQs

1. Majha region lies between which two rivers?
(A) Satluj and Beas
(B) Ravi and Beas
(C) Chenab and Ravi
(D) Jhelum and Chenab

⸻

2. The word “Doaba” means:
(A) Land of five rivers
(B) Land between two rivers
(C) Land of deserts
(D) Mountain region

⸻

3. Bist Doab is located between:
(A) Ravi and Beas
(B) Beas and Satluj
(C) Satluj and Yamuna
(D) Ravi and Satluj

⸻

4. Bari Doab lies between:
(A) Beas and Satluj
(B) Ravi and Beas
(C) Chenab and Ravi
(D) Jhelum and Chenab

⸻

5. Which region of Punjab is the largest?
(A) Majha
(B) Doaba
(C) Malwa
(D) Puadh

⸻

6. Puadh region includes areas around:
(A) Amritsar and Gurdaspur
(B) Jalandhar and Hoshiarpur
(C) Patiala and Rupnagar
(D) Bathinda and Mansa

⸻

7. Which region is known as the “heartland of Sikh culture”?
(A) Malwa
(B) Doaba
(C) Majha
(D) Puadh

⸻

8. Doaba region includes:
(A) Amritsar
(B) Moga
(C) Patiala
(D) Jalandhar

⸻

9. Malwa region lies to the ______ of the Satluj River.
(A) North
(B) South
(C) East
(D) West

⸻

10. Which of the following districts is part of Bist Doab?
(A) Amritsar
(B) Jalandhar
(C) Bathinda
(D) Patiala

Answer Key – Practice Sheet Day-2 (Punjab Geography) 👇
1. (B) Ravi and Beas
2. (B) Land between two rivers
3. (B) Beas and Satluj
4. (B) Ravi and Beas
5. (C) Malwa
6. (C) Patiala and Rupnagar
7. (C) Majha
8. (D) Jalandhar
9. (B) South
10. (B) Jalandhar