Class 10 Carbon And Its Compounds CBSE Questions & Answers

Class 10 · Carbon And Its Compounds

This is online test 03 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
When acetic acid reacts with ethyl alcohol, we add conc. \({{\rm{H}}_{\rm{2}}}{\rm{S}}{{\rm{O}}_{\rm{4}}}\). It acts as ……….and the process is called ………….. .
  • A
    Acid, esterification
  • B
    Dehydrating agent, esterification
    Correct
  • C
    Reducing agent, esterification
  • D
    oxidizing agent, saponification
2
Acetic acid when dissolves in water, it dissociates into ions reversibly because it is
  • A
    weak base
  • B
    strong base
  • C
    a weak acid
    Correct
  • D
    strong acid
3
Statement A : detergent with less branching in the molecule is degraded more easily than branched chain detergents. , Statement B : soaps are \({\rm{1}}00\% \) biodegradable
  • A
    statement A is true, B is false
  • B
    Both the statement A and B are true
    Correct
  • C
    Neither statement A, nor statement B is true
  • D
    statement B is true, A is false
4
Activated charcoal is used in sugar industry as a
  • A
    oxidizing agent
  • B
    reducing agent
  • C
    Dehydrating agent
  • D
    decolorizing agent
    Correct
5
\({{\rm{C}}_{{\rm{6}}0}}\)and \({{\rm{C}}_{{\rm{7}}0}}\) are important members of which of the allotropes of carbon?
  • A
    fullerenes
    Correct
  • B
    Graphite
  • C
    coal
  • D
    Diamond
6
Statement A : solubility of alcohols in water goes on increasing with increasing molecular weight , Statement B : Boiling point of alcohols goes on increasing with increasing molecular weight
  • A
    statement A is true, B is false
  • B
    Neither A nor B is true
  • C
    Both the statement A and B are true
  • D
    statement B is true, A is false
    Correct
7
What is the correct nomenclature of
Question 7 figure 1
  • A
    3 – methyl butane
  • B
    3 methyl butane
  • C
    2 – methyl butane
    Correct
  • D
    2 methyl butane
8
Find the incorrect statement about soap.
  • A
    Soaps are acidic in nature
    Correct
  • B
    \({\left( {{{\rm{C}}_{{\rm{17}}}}{{\rm{H}}_{{\rm{31}}}}{\rm{COO}}} \right)_{\rm{2}}}{\rm{Ca}}\) is the scum produced when the soap reacts with ions present in hard water
  • C
    fat is hydrolysed with NaOH to get soap
  • D
    \({{\rm{C}}_{{\rm{17}}}}{{\rm{H}}_{{\rm{31}}}}{\rm{COONa}}\) is a soap
9
The structural formula of an ester is , From which acid and alcohol it is formed
Question 9 figure 1
  • A
    propanoic acid, Methanol
  • B
    formic acid, ethanol
  • C
    formic acid , propanol
    Correct
  • D
    ethanoic acid, ethanol
10
Statement A : oxyacetylene flame is used for welding purposes , Statement B : ethyne reacts with HCl in the presence of \({\rm{HgC}}{{\rm{l}}_{\rm{2}}}\) to from vinyl chloride.
  • A
    Neither statement A nor statement B is true
  • B
    statement B is true, A is false
  • C
    Both the statement A and B are true
    Correct
  • D
    statement A is true, B is false
11
Substance ‘X’ is formed by the reaction of carboxylic acid and alcohol. It is used in making ice creams, cold drinks, perfumes and in flavoring agent Name ‘X’.
  • A
    Aldehyde
  • B
    Ester
    Correct
  • C
    ketene
  • D
    alkyne
12
Drinking alcohol and driving may cause serious accidents. To discourage this, police randomly lest drivers for alcohol using a breath analyzer. The breath analyzer works because.
  • A
    alcohol makes the breath hotter which changes the machine reading
  • B
    alcohol causes more saliva which the machine checks.
  • C
    alcohol in the breath cause a chemical change registered by the machine.
    Correct
  • D
    alcohol makes the breath dry and the machine registers moisture
13
Statement A : ethane decolorizes bromine water whereas ethyne does not , Statement B : mixture of water and alcohol is used in radiators of vehicles in cold countries
  • A
    statement A and B are false
  • B
    statement A and B are true
  • C
    statement B is true, A is false
    Correct
  • D
    statement A is true, B is false
14
How would you name the following compound
Question 14 figure 1
  • A
    Hex-2-ene
  • B
    Hex-1-yne
    Correct
  • C
    Methylpentyne
  • D
    Methylpenkne
15
While cooking if the bottom of the vessel is getting blackened on the outside, it means that
  • A
    the fuel is burning completely. a H
  • B
    the food is not cooked completely
  • C
    the fuel is wet
  • D
    the fuel is not burning completely
    Correct