SSC Worksheet for chapter-6 Carbon and Its Compounds class 10

Worksheet For class 10

This page is prepared by the Academic team of Physics Wallah which consists of SSC Board Worksheet for Class 10 Chemistry. Students of Class 10 Chemistry can get a free Worksheet for Class 10 Chemistry in PDF format prepared as per the newest syllabus and examination pattern in your schools.

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Objective Type Questions

Q1. While cooking if the bottom of the vessel is getting blackened on the outside, it means that

1. Food is not cooked completely
2. The fuel is not burning completely
3. Fuel is wet
4. Fuel is burning completely

Q2. Two products from a chemical reaction have pungent and pleasant smell respectively determine them

1. Ethanone and ethanal
2. Ethanoic acid and ethanol
3. Ethanoic acid and ethanone
4. Ethanal and ethanol

Q3. Oils on treating with hydrogen in the presence of palladium or nickel catalyst forms fats. This is an example of

1. Displacement reaction
2. Addition reaction
3. Oxidation reaction
4. Substitution reaction

Q4. The soap molecule has a

1. Hydrophilic head and hydrophobic tail
2. Hydrophobic head and hydrophilic tail
3. Hydrophobic head and hydrophobic tail
4. Hydrophilic head and hydrophilic tail

Q5. Which of the following represent saponification reaction ?

1. CH₃COONa + NaOH CH₄ + Na₂CO₃
2. CH₃COOH + C₂H₅OH CH₃COOC₂H₅ + H₂O
3. 2CH₃COOH + 2Na→2CH₃COONa + H₂
4. CH₃COOC₂H₅ + NaOH→CH₃COONa + C₂H₅OH

Q6. Vinegar is a solution of

1. 50 – 60% acetic acid in alcohol
2. 5 – 8% acetic acid in water
3. 50 – 60% acetic acid in water
4. 5 – 8% acetic acid in alcohol

Q7. Carbon exists in the atmosphere in the form of

1. CO only
2. CO in traces and CO₂
3. CO₂ only
4. CO₂ in traces and CO

Q8. Vegetable oils + H₂ fats (ghee) this reaction is called

1. Substitution
2. Dehydrogenation
3. Hydrogenation
4. Exothermic

Q9. Which one is not part of homologous series ?

10. Fill in the blank

C₂H₅OH + PCl₃→_____________

1. C₂H₅Cl + H₃PO₄
2. C₂H₅Cl + H₃PO₃
3. C₂H₅COOH + CH₃OH
4. CH₃ – CHO + CH₃ – CHO

Subjective Type Questions

Q11. What is difference between toilet and laundry soap ? Explain.

Q12. What is allotropy ? Give name of three elements who exhibit it also explain different types of carbon allotropes ?

Q13. Give a test that can be used to differentiate between butter and cooking oil ?

Q14. How would you distinguish between an alcohol and a carboxylic acid experimentally ?

Q15. A mixture of oxygen and ethyne is used for welding why do you think a mixture of air and ethyne is not used.

Answer Key :

Carbon and its Compounds

1. (b)

2. (b)

3. (b)

4. (a)

5. (d)

6. (b)

7. (b)

8. (c)

9. (c)

10. (b)

Solutions :-

Ans 11.

Toilet Soaps	Laundry Soaps
High quality for and oils as raw materials Expensive perfumes added Care is taken to ensure that there is no free alkali content to prevent injuries to skin Fillers are added to alter their physical characteristics and properties	Cheaper quality of fats and oils are used as raw materials Cheap perfumes are added No such care is taken No fillers are added

Ans 12. Allotropy→It is a phenomenon in which an element exhibits physical forms with almost familiar chemical properties, the different physical forms exhibited by the element age called allotropes.

Carbon, phosphorous and sulphur exhibits allotropy.

Carbon has two types of allotropic forms.

(a) Crystalline→they have well-defined regular geometrical arrangements of carbon atoms.

(i) Diamond (ii) Graphite (iii) Fullerene

(b) Amorphous→In these forms of carbon, the carbon atoms are not arranged in an orderly manner.

e.g. Charcoal, Coke etc.

Ans 13. Butter contains saturated compounds while cooking oil contains unsaturated compounds. Since unsaturated compounds are oxidized by alkaline KMnO₄ with disappearance of its pink colour.

When cooking oil is treated with a few drops of alkaline KMnO₄, pink colour of KMnO₄ disappears with butter however, the pink colour of KMnO₄ does not disappear.

Ans 14. Sodium bicarbonate test (NaHCO₃ test)

Alcohol + NaHCO₃→No effervescence

Acid + NaHCO₃→Brisk effervescence

The sample which produces brisk effervescence when treated with NaHCO₃ due to release of CO₂ is a carboxylic acid.

Ans 15. We need high temperature for welding but when ethyne is burned in air, it undergoes incomplete combustion and releases a lot of smoke and the temperature is also not very high.

In order to ensure complete oxidation and to obtain the high temperature needed for welding, a mixture of ethyne and oxygen is used.

2CH = CH + 5O₂→4CO₂ + 2H₂O + Heat + Light