Yeh page Class 10 Science ke NCERT Exemplar solutions Hinglish me aapke saamne rakhta hai. Har chapter ke important sawaal aur unke detailed answers—sab kuch yahan milega, bina kisi jhanjhat ke.
So, what exactly is NCERT Exemplar? Think of it as that extra practice book CBSE students keep hearing about. It’s not your main textbook, but honestly, it’s a game-changer for exam prep. Inside, you’ll find a bunch of additional questions—way beyond the usual ones. They’re designed to push your understanding, not just test your memory. And yeah, they do come in handy when you’re staring down those tricky board exam papers. Simple as that.
Here we have provided NCERT Solution for Class 10 Science (Exemplar) in urdu Language, Just select the chapters below to get solution of the same:
Chemical Reactions and Equations
Acids, Bases and Salts
Metals and Nonmetals
Carbon and Its Compounds
Periodic Classification of Elements
Life Processes
Control and Coordination
How Do Organisms Reproduce
Heredity and Evolution
LightReflection and Refraction
The Human Eye and The Colourful World
Electricity
Magnetic Effects of Electric Current
Source of Energy
Our Environment
Management of Natural Resources
Is chapter mein hum chemical reactions ki alag-alag types samjhenge—aur haan, unhe balance karna bhi seekhenge. NCERT Exemplar ke problems ke solutions aapko neeche mil jayenge, bilkul saaf aur step-by-step.
Question: Sodium hydroxide aur hydrochloric acid ki reaction se kya produce hota hai? Dono react karte hain toh sodium chloride aur paani banta hai. Simple sa equation hai—NaOH plus HCl, aur result mein aata hai salt aur water. Acid aur base ki yeh neutralizing reaction hai, jismein dono ek dusre ko balance kar dete hain. Isliye solution ka pH neutral ho jaata hai, kyunki acid aur base ki taakat khatam ho jaati hai. Aur haan, yeh exothermic bhi hai, toh halki si garmi nikal sakti hai. Bas itna hi—salt aur paani.
Solution: Sodium hydroxide reacts with hydrochloric acid to form sodium chloride and water. Straight up, that’s NaOH plus HCl giving you NaCl and H2O. Classic neutralization reaction, nothing fancy—acid meets base, they cancel each other out, and you’re left with salt and water. That’s the whole deal right there.
Iron filings ko agar copper sulphate solution mein daal diya jaye, toh kya hota hai? Reaction hoti hai — aur wo bhi displacement reaction, bilkul seedha sa. Iron, copper se zyada reactive hai, isliye wo copper ko uske sulphate solution se turant nikaal deta hai. Solution ka colour badalta hai, pehle neela hota hai, phir halka hara ho jaata hai kyunki iron sulphate banta hai. Aur copper ka fine layer iron filings ke upar aa jaata hai, jisse wo brownish ya reddish dikhne lagte hain. Ye poora process room temperature par hi ho jaata hai — kisi heating ki zaroorat nahi padti, bilkul nahi.
Simple enough, right? Iron jumps into copper sulphate and kicks the copper out — just like that. The copper gets displaced, plain and simple, while iron sulphate forms in its place. So the equation looks like this: Fe plus CuSO4 gives you FeSO4 plus Cu. That’s a displacement reaction, no two ways about it.
Chapter 2 dives into acids, bases, and salts—what they are, how they behave, where we actually bump into them in daily life, plus the reactions they pull off. Took me a while to get the hang of it, honestly. Anyway, here's the deal on a few key exemplar problems from that chapter.
Question: pH scale kya hoti hai, aur isse kaise measure karte hain?
Solution: pH scale basically tells you whether something's acidic or basic, and it runs from 0 to 14. Simple enough, right? If a solution sits below 7, call it acidic. Above 7? Basic. Exactly at 7, you've got neutral—boring but important. We measure it with pH paper or a pH meter, nothing fancy.
Question: So, what’s the actual difference between washing soda and baking soda?
Straight off the bat, washing soda, that’s Na2CO3·10H2O, is your go-to for softening hard water and scrubbing things clean. Baking soda, or NaHCO3 if you're keeping score, does its own thing—it’s in the kitchen for cooking and helps settle acidity.
Metals and non-metals—this chapter’s got it all, honestly. We’re talking physical properties, chemical properties, the whole reactivity series, and then those extraction processes that can get a bit tricky. It’s a lot to unpack. It all ties together once you see the pattern. You’ll start with how they behave, then move into why some react like crazy while others just sit there. Finally, how we actually pull metals out of the earth. Yeah, it’s dense. Stick with it—it makes sense in the end.
Yeh sawal aksar aata hai, aur seedha sa hai. Reactivity series kya hai? Asaan zuban mein samjho toh yeh ek list hai jo metals ko unki chemical reactivity ke hisaab se arrange karti hai. Iska matlab yeh hai ke kaunsa metal kis se zyada ya kam react karta hai. Aur agar baat karein order ki, toh sabse upar woh metals aate hain jo sabse zyada reactive hain, jaise potassium aur sodium. Phir niche aate hain calcium, magnesium, aluminium, zinc, iron, aur aage. Sabse neeche gold aur silver jaise metals hain jo bahut kam react karte hain. Toh is tarah se poori series ban jaati hai, jisme upper wale metals neeche walon ko unke compounds se displace kar sakte hain. Bas, yahi hai iska basic funda.
Solution: The reactivity series is basically a ranked list of metals, from the most eager to react down to the ones that just can't be bothered. Up at the top, you've got the real hotheads—potassium (K) and sodium (Na). They're ready to react with almost anything. Then you slide all the way to the bottom, and there's the cool, calm crew: gold (Au) and silver (Ag). They barely lift a finger. That order tells you exactly who's going to react first and who's going to sit back and watch.
Question: Iron ko rust se kaise bachaya jata hai? Yaani, kaunse tarike hain jo isse corrosion se door rakh sakte hain?
Rust is iron’s worst enemy, plain and simple. To keep it at bay, you’ve got a few solid options—painting, galvanizing, or alloying. Painting’s pretty straightforward: slap a coat on, and that’s that. Galvanizing, though, that’s where you dip the iron in a zinc bath, giving it a nice protective coating that sticks around. So yeah, zinc’s the hero there, not just a fancy extra. Either way, you’re buying the metal more time before it crumbles.
Light doesn’t just travel—it bends, bounces, and behaves in ways that shape how we see the world. This chapter digs into all of that: how light behaves, what happens when it reflects off mirrors, how it refracts when passing through lenses. The roles both mirrors and lenses play in forming images. And of course, the exemplar problems? Those solutions are where the real understanding clicks into place.
So, the question here is pretty straightforward: how do you actually find the focal length of a concave mirror? Let's break it down without overcomplicating things. First, you need to remember that a concave mirror curves inward, like the inside of a spoon. The focal length is basically the distance from the mirror's surface to the point where parallel rays of light converge after reflection. To find it practically, you can use the mirror formula, which is 1/f = 1/v + 1/u, where f is the focal length, v is the image distance. U is the object distance. But if you're doing it in a lab, you'd set up an object, move a screen until you get a sharp image, then measure both distances and plug them into that formula. Easy enough, right? Alternatively, there's a simpler trick: focus a distant object, like the sun, onto a screen or a piece of paper. The distance from the mirror to the sharp point of light is your focal length, because parallel rays from far away meet at the focus. That's the quick and dirty method, and it works like a charm. Just be careful not to burn anything while you're at it!
Concave mirror ka focal length? Simple — wahi distance hoti hai mirror ke focus point tak. Experiment mein object ko alag-alag jagah rakh ke dekhte hain, image banti hai, aur phir formula lagate hain. Bas.
Refractive index kya hai, aur iska formula kya hota hai—yeh sawaal aksar aata hai. Chalte hain seedha jawab ki taraf. Refractive index, yaani kisi medium ka apavartak (refraction) ka maap, yeh batata hai ki light us medium mein kitni tezi se aur kis angle pe mude gi. Iska basic formula hai: n = c/v, jahan n refractive index hai, c light ki speed vacuum mein (approx 3 × 10^8 m/s), aur v light ki speed uss medium mein. Bas, itna hi — seedha aur saaf.
Straight to the point: refractive index is simply the speed of light in vacuum divided by its speed in that medium. So you get n = c/v. Here, c stands for the speed of light in a vacuum, and v is how fast light actually moves through the material you’re dealing with. That’s the whole formula, no hidden tricks.
Look, if you're using Class 10 Science NCERT Exemplar, these solutions are going to be your best friend. They really help you wrap your head around the trickier concepts in a way that actually sticks. And here's the thing—practice isn't just a suggestion, it's the whole game. You do it regularly, and your exam performance will reflect that. Simple as that.
