When lead nitrate (Pb(NO₃)₂) is heated, it decomposes to form lead oxide, nitrogen dioxide, and oxygen. What is the color of the nitrogen dioxide gas evolved?
Anonymous Quiz
29%
Colorless
19%
Green
40%
Brown
12%
Yellow
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What happens when an iron nail is placed in a copper sulphate solution?
Anonymous Quiz
65%
The solution turns green and a brown layer deposits on the nail.
19%
The solution remains blue and a silver layer deposits on the nail.
8%
No reaction occurs.
7%
The solution turns colorless and the nail dissolves.
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Which of the following processes is endothermic in nature?
Anonymous Quiz
31%
Burning of natural gas
12%
Dilution of a strong acid
35%
Decomposition of calcium carbonate
22%
Respiration in human beings
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The reaction CaO(s) + H₂O(l) → Ca(OH)₂(aq) is an example of which type of reaction?
Anonymous Quiz
12%
Decomposition reaction
13%
Displacement reaction
69%
Combination reaction
6%
Double displacement reaction
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Silver articles turn black after some time when exposed to air because they react with:
Anonymous Quiz
44%
Oxygen in the air
11%
Nitrogen in the air
37%
Sulphur compounds in the air
9%
Carbon dioxide in the air
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When aqueous solutions of lead(II) nitrate and potassium iodide are mixed, what is the color of the precipitate formed?
Anonymous Quiz
27%
White
15%
Blue
24%
Brown
34%
Yellow
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Which gas is flushed into packets of chips to prevent rancidity?
Anonymous Quiz
5%
Oxygen
83%
Nitrogen
8%
Hydrogen
4%
Carbon dioxide
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The chemical reaction used in black and white photography is:
Anonymous Quiz
30%
Combination of silver and bromine
51%
Decomposition of silver bromide
11%
Displacement of silver by bromine
8%
Oxidation of silver bromide
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✨ Quote of the Day
Success is the sum of small efforts repeated day in and day out! 💪
Success is the sum of small efforts repeated day in and day out! 💪
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✅ Today's quiz on Chemical Reactions and Equations is complete! Well done! 🎉
➡️ Tomorrow's Topic
Acids, Bases and Salts
📍 Channel: @class_10_science_notes
See you tomorrow! 👋
NEXT QUIZ IN @Class_10_notes in which quiz is going to start in 1 minute.
Acids, Bases and Salts
📍 Channel: @class_10_science_notes
See you tomorrow! 👋
NEXT QUIZ IN @Class_10_notes in which quiz is going to start in 1 minute.
❤4⚡1🕊1
📚✨ CBSE Class 10th – QUESTION & CONCEPT BANK 2026 ✨📚
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🚀 Get ready for your exams with the ultimate study package by Physics Wallah!
🔥 What’s Inside?
✅ Chapterwise Concept Maps 🧠
✅ NCERT & Exemplar Questions 📖
✅ Competency Focused Blueprints + Solved Qs
✅ Handpicked PYQs from Top Schools 🎯
✅ Mock Tests as per Latest Pattern 🏆
✅ CBSE 2025 PYQ + Sample paper
📕 Order Now from Amazon - https://www.amazon.in/stores/page/D941ECE1-A87F-49F5-A73D-1A99114A697C?channel=CLASS10_QB_27SEP
❤3👍2🥰1
📢 Today's Quiz Topic
Acids, Bases and Salts
⏰ The quiz will start in 30 seconds! Get ready! 🧠
Acids, Bases and Salts
⏰ The quiz will start in 30 seconds! Get ready! 🧠
❤5👍5🕊1
What are the products formed when a zinc granule reacts with dilute sulphuric acid?
Anonymous Quiz
16%
Zinc sulphate and Oxygen
67%
Zinc sulphate and Hydrogen
13%
Zinc chloride and Hydrogen
4%
Zinc oxide and Water
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Tooth decay starts when the pH of the mouth is:
Anonymous Quiz
17%
Higher than 7
9%
Exactly 7
65%
Lower than 5.5
9%
Higher than 5.5
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A farmer finds that the soil in his field is too acidic. Which of the following should he add to the soil to adjust its pH?
Anonymous Quiz
15%
Vinegar
19%
Common salt
54%
Slaked lime
12%
Gypsum
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A student adds a few drops of a dilute acid to a test tube containing egg shells. What would they observe?
Anonymous Quiz
9%
No reaction occurs.
39%
A pungent smelling gas is evolved.
45%
A colourless, odourless gas is evolved.
6%
Brown fumes are observed.
❤5
What is the common name for the compound NaHCO3?
Anonymous Quiz
17%
Washing soda
56%
Baking soda
20%
Bleaching powder
7%
Caustic soda
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Clove oil is an example of which type of indicator?
Anonymous Quiz
16%
Natural indicator
11%
Synthetic indicator
71%
Olfactory indicator
2%
Universal indicator
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Which option correctly represents the number of water molecules of crystallisation in washing soda and Plaster of Paris respectively?
Anonymous Quiz
13%
10 and 2
23%
5 and 1/2
59%
10 and 1/2
6%
2 and 10
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