Questions on Practical chemistry CLASS 10 ICSE

Questions on Practical chemistry 

CLASS 10 ICSE

1. A compound 'X' is a water soluble salt. When Lead nitrate solution is added to the aqueous solution of the salt 'A', it gives a white ppt. which dissolves on heating. 

And salt 'A' gives golden yellow flame in flame test. Name of the salt 'A' is ___________

2. When a highly soluble gas 'G' is dissolved in water, it forms it's aqueous solution. This aqueous solution gives a deep blue solution when added in excess to Copper sulphate solution. Name of the gas 'G' is ____________.

3. Compound 'C' is a preferred reactant in the laboratory preparation of Ammonia gas from Ammonium salts. State the appropriate observation when Sodium hydroxide solution is added to the aqueous solution of the salt, formed when Compound 'C' is neutralized by dil.HCl ___________

4. Salt 'M' is a deliquescent compound that can be prepared by direct combination of a metal and a highly reactive non-metal.  When it's salt solution is treated with Sodium hydroxide solution gives a reddish brown ppt. The name of the salt is _______________

5. When an oxidizing agent, which is black powder, is heated with a conc. Acid 'A' gives a greenish yellow gas. Then identify that acid 'A'.

_____________

6. Dilute Hydrochloric acid reacts with a salt ' T' to produce a colourless gas. When this gas is passed into lime water, it turns milky. That gas decolourizes acidified Potassium permanganate solution. Identify the anion present in the salt 'T' _______________

7. A chemical compound 'Q' on heating leaves a yellow residue fused with glass test tube and gives reddish brown vapours. What is the observation when that yellow residue is heated with Ammonia gas? ____________

8. State one appropriate observation when Ammonium hydroxide is added in small amount to Zinc sulphate solution, then in excess._________________

9. A platinum wire is dipped in Calcium chloride solution and introduced into the flame of a burner. The colour of the flame is ____________

10. Identify the hydrated salt which on heating loses it's water of crystallization and turns it's colour from blue to colourless(or white) : _________________

ICSE EXAMINATION 2026

 14 days to go 

New Inventions in 2025

New Inventions in 2025: Shaping the Future Today

The year 2025 has become a landmark in human innovation, bringing forth inventions that are transforming how we live, work, and connect with the world. From artificial intelligence to sustainability, every field has witnessed remarkable progress.

One of the most exciting inventions of 2025 is the rise of **AI-powered personal assistants** that go far beyond scheduling and reminders. These systems now understand emotions, context, and even health indicators through voice and facial cues. They can suggest rest when you sound tired, or adjust home lighting to improve your mood—creating a seamless link between technology and wellbeing.

In the field of **healthcare**, scientists have developed **wearable diagnostic patches** that can continuously monitor blood sugar, hydration levels, and stress hormones without a single needle. Combined with cloud-based AI, these devices alert doctors in real time, helping prevent health emergencies before they occur.

The **energy sector** has also seen breakthroughs with compact **solid-state batteries** that charge electric vehicles in under ten minutes and last for decades. Meanwhile, **solar fabrics**—lightweight materials that generate power from sunlight—are now being woven into clothes and building materials.

In **space technology**, reusable mini-rockets have made low-orbit research affordable for universities and private startups, fueling a new age of exploration and innovation beyond Earth.

Sustainability remains a central theme. New **biodegradable plastics made from algae and food waste** are replacing petroleum-based materials, drastically reducing pollution. Smart recycling robots now sort waste with precision, learning to identify materials better than humans can.

2025 also brought innovation to everyday life. **Self-healing concrete** automatically fills its cracks when exposed to rain, making infrastructure more durable and reducing maintenance costs. **Smart kitchens** equipped with AI-guided recipe systems help reduce food waste by suggesting meals based on available ingredients.

What unites these inventions is their shared goal: improving quality of life while protecting the planet. The boundary between imagination and reality is fading fast, and 2025 proves that the future is no longer something to wait for—it’s being built today.

ICSE CHEMISTRY STUDY OF COMPOUNDS IMPORTANT EQUATIONS AND OBSERVATIONS