Class 10 Carbon And Its Compounds CBSE Questions & Answers

Class 10 · Carbon And Its Compounds

This is online test 02 for CBSE class 10 Science Carbon and its Compounds.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
The chemical compound present in fruit is
  • A
    \({\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{COO }}{{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}\)
    Correct
  • B
    \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{COOH}}\)
  • C
    All of these
  • D
    \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{OH}}\)
2
When few drops of ethanoic acid were added to solid sodium bicarbonate. Which of the following observations was obtained
  • A
    brisk effervescence occurred
    Correct
  • B
    a pungent smelling gas evolved.
  • C
    a hissing sound was produced
  • D
    brown fumes evolved
3
Soap doesn’t work well with woolen garments because
  • A
    It is acidic in nature and woolen garments have basic dyes
  • B
    None of these
  • C
    Both a and b
  • D
    It is basic in nature and woolen garments have acidic dyes
    Correct
4
Which of the following enzyme helps in breaking sucrose into glucose and fructose
  • A
    Zymase
  • B
    Invertase
    Correct
  • C
    Diastase
  • D
    Maltase
5
\(CH{\rm{ = C}}{{\rm{H}}_{\rm{2}}}{\rm{ + B}}{{\rm{r}}_{\rm{2}}}{\rm{(aq) }} \to {\rm{ Br C}}{{\rm{H}}_{\rm{2}}}{\rm{ - C}}{{\rm{H}}_{\rm{2}}}{\rm{Br}}\) The above reaction is an example of-
  • A
    combustion reaction
  • B
    substitution reaction
  • C
    Addition reaction
    Correct
  • D
    Hydrogenation reaction
6
The formulae of two organic acids ‘X’ and ‘Y’ are \({{\rm{C}}_{{\rm{1}}0}}{{\rm{H}}_{{\rm{21}}}}{\rm{COOH}}\) and \({{\rm{C}}_{{\rm{19}}}}{{\rm{H}}_{{\rm{39}}}}{\rm{COOH}}\). Which of them exists in liquid state at room temperature?
  • A
    X
  • B
    Y
  • C
    Both X and Y
    Correct
  • D
    Neither X and Y
7
Statement A : Acetic acid freezes at 290k , Statement B : Acetic is also called as glacial acetic acid.
  • A
    Both the statement A and B are true
    Correct
  • B
    Statement A is true, B is false
  • C
    Neither A nor B is true
  • D
    Statement B is True, A is false
8
Substance ‘X’ is formed by the oxidation of an aldehyde : What will be the action of the substance formed on the litmus solution
  • A
    turns red litmus blue
  • B
    No action on litmus solution
  • C
    turns blue litmus red
    Correct
  • D
    Name of these
9
An organic compound A of molecular formula \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{6}}}{\rm{O}}\) on oxidation gives an acid B with the same number of carbon atoms in the molecule as A. Compound A is of the used for sterilization of skin by doctors name compound A and B
  • A
    Compound A is \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{OH}}\) and B is \({\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{COOH}}\)
    Correct
  • B
    Compound A is \({\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{O C}}{{\rm{H}}_{\rm{3}}}\) and B is \({\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{COOC}}{{\rm{H}}_{\rm{3}}}\)
  • C
    Compound A is \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{OH}}\) and B is \({\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{CHO}}\)
  • D
    Compound A is \({\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{COOH}}\) and B is \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{COOH}}\)
10
Soda lime is a mixture of NaOH and CaO. What is the ratio of NaOH and CaO in soda lime.
  • A
    0.125694444444
    Correct
  • B
    0.04375
  • C
    0.0854166666667
  • D
    0.126388888889
11
Which of the following hydrocarbons undergo addition reactions? \({{\rm{C}}_{\rm{3}}}{{\rm{H}}_{\rm{8}}},{\rm{ }}{{\rm{C}}_{\rm{3}}}{{\rm{H}}_{\rm{6}}},{\rm{ }}{{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{OH}},{\rm{ C}}{{\rm{H}}_{\rm{4}}},{\rm{ }}{{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{2}}}\)
  • A
    \({{\rm{C}}_{\rm{3}}}{{\rm{H}}_{\rm{8}}},{\rm{ }}{{\rm{C}}_{\rm{3}}}{{\rm{H}}_{\rm{6}}}\)
  • B
    \({{\rm{C}}_{\rm{3}}}{{\rm{H}}_{\rm{6}}},{\rm{ }}{{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{2}}}\)
    Correct
  • C
    \({\rm{C}}{{\rm{H}}_{\rm{4}}},{\rm{ }}{{\rm{C}}_{\rm{3}}}{{\rm{H}}_{\rm{8}}}\)
  • D
    \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{OH}},{\rm{ }}{{\rm{C}}_{\rm{3}}}{{\rm{H}}_{\rm{8}}}\)
12
Statement A : Valerie acid is the common name of hexane , Statement B : Glycerol is added in the manufacturing of soap
  • A
    Both Statements A and B are true
    Correct
  • B
    Statement B is true and A is false
  • C
    Statement A is true and B is false
  • D
    Neither statement A nor statement B is false
13
What is denatured spirit?
  • A
    ethanol + methanol (\({\rm{5}}\% \))
    Correct
  • B
    methanol only
  • C
    ethanol only
  • D
    none.
14
Which of the following compounds contain carboxylic group-
  • A
    \({\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{OH}}\)
  • B
    \({\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{COO}}{{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}\)
  • C
    \({\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{COOH}}\)
    Correct
  • D
    \({\rm{C}}{{\rm{H}}_{\rm{3}}} - {\rm{ C}}{{\rm{H}}_{\rm{2}}} - {\rm{ C}}{{\rm{H}}_{\rm{3}}}\).
15
Alcohol produces
  • A
    Sooty flame
  • B
    luminous flame
  • C
    Smoky flame
  • D
    Non luminous flame
    Correct