X CBSE | NCERT Carbon and Its Compounds - Test Paper

1. If the pH of water is two, out of soap and detergent which one will you usefor cleaning clothes? (1)

1. Name the compound CH₃COOC₂H₅.Name the acid and alcohol from which it is made .write equation.

2. An organic compound X with a molecular formula C₂H₆O undergoes oxidation with in presence of Alkaline  KMnO₄ to form a compound Y. X on heating in presence of conc. H₂SO₄ at 443k gives Z which on reaction with H₂O in presence of H₂SO₄ gives back ‘X’ ‘Z’ reacts with Br₂ (aq) and decolorizes it.

Identify X, Y &Z and write the reactions involved. (3)

3. An organic compound ‘A’ is widely used as a preservative in pickles and has a molecular formula C₂H₂O₂ .This compound reacts with ethanol to form a sweet smelling compound B.

(i) Identify the compound A.

(ii) Write the chemical equation for its reaction with ethanol to formcompound ‘B’

(iii) How can we get compound ‘A’ back from B?

(iv)Name the process and write corresponding chemical equation (3)

4. Hydrocarbons X and Y have melting points-190⁰ C & -90⁰ C respectively.Which one of these has minimum carbon in the molecule &why? (2)

5. Three bottles without labels contain alcohol, ethanoic acid and soap solution separately how will you test which bottle contains what. (3)

6. A compound X has molecular formula C₄H₁₀.It undergoes substitution reaction more readily than addition reaction. It burns with blue flame and is present in LPG. Identify ‘X’ and give the balanced equation for its combustion and substitution reaction with Cl₂ in the presence of sunlight. (3)

7. A compound ‘A’ works well with hard water. It is used for making shampoos and products for cleaning clothes. A is not 100%biodegradable and causes water pollution. ‘B’ does not work well with hard water. It is 100%biodegradable and does not create water pollution. Identify A&B. (1)

8. Can we use sodium metal for drying alcohol, why? (2)

9. Complete and balance following equation:-

a) CH₂=CH₂ + H₂  --Heat---------->

b) CH₄+O₂   --------------------à

10. Two alkanes A and B have 4 and 6 carbon atoms respectively in their molecule. In which physical state will they occur at room temp?

i) Give a test that can be used to differentiate chemically between butter and cooking oil.

ii) How will you distinguish between ethanol and ethanoic acid by a suitable chemical test? Write chemical reactions involved.

ii) Complete the following reactions :-

a) CH₃COOH + NaHCO₃ --coc. H2SO4-------->

b) HCOOH + CH₃OH-------------->

c) CH₃COOC₂H₅ + H₂O----------->

MCQ MULTIPLE TYPE QUESTIONS Q1. Which of the following is not a saturated hydrocarbon? i) cyclohexane.           ii)benzene.                 iii)butane                  iv)isobutene Q2.The bond between two identical non matalic atom has a pair of electron?  i) un equally shared between two atoms.       ii) transferd completely from one atom to another.  iii) with identical spins                      iv) equally shared between them. Q 3. Covalent compounds are genarily i) solubal in water     ii)insolubal in water        iii)ionize in water    iv)hydrolyse in water Q 4. Propane with the molecular formula C3H8 has i)7covalent bonds                ii)8 covalent bonds                 iii)9 covalent bonds             iv)alcohol Q5. A hydrocarbon reacts with ammonical cuprons chloride Solution to form a red pricipate .The hydrocarbon is  i)ethane                 ii)ethane                   iii)2-pentyne                iv)1-propyne Q6.Which of the following substance is added to denature Ethanol? i)methanol                ii) pyricline       iii)copper sulphate             iv)all of them Q7. Which of the following is not an allotropic form of carbon i)fluronie                ii)fullerence                 iii)diamond              iv)graphite Q8.Detergents are sodium or potassium salts of long chain of ;- i)aldehydes           ii)ketones                   iii)carboxylic acid      iv)sulphonic acid Q9.Which of the following represents the correct increasing order Of unsaturated carbon ?  i)alkanes , alkenes , alkynes                                 ii)alkanes , alkaynes , alkenes  iii)alkenes , alkynes , alkanes                          iv)alkynes , alkanes , alkenes Q10. In double covalent bond there is sharing of  i)2 electrons         ii)4 electrons                    iii) 6electrons                    iv)3 electrons Links For   CBSE Class X Science Term-II Carbon and Its Compounds Periodic Classification of Elements  of Elements For Solved CBSE Exam questions Visit  Read more