Acid Bases And Salts CBSE Questions & Answers

Acid Bases And Salts

This is Science Class 10 Acid Bases and Salts CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
The basic nature of sodium Hydroxide (NaOH) is due to the presence of which one of the following ions in solution
  • A
    Hydroxide ions
    Correct
  • B
    Sodium ions
  • C
    Hydrogen ions
  • D
    chloride ions
2
You are provided with a sample and a strip of red litmus paper. How would you confirm the nature of the sample ?
  • A
    Dip the litmus paper in a dilute solution of NaCl and then put three drops of the liquid sample on it
  • B
    Dip the litmus paper in a dilute solution of NaOH and then put 2 drops of the liquid sample on it.
    Correct
  • C
    Put four drops of the liquid sample on the litmus paper.
  • D
    Dip the litmus paper in the sample
3
A bud of petunias become reddish purple after first shower of rain because
  • A
    First shower causes buds to blossom
  • B
    First shower of acid rain
    Correct
  • C
    First shower causes buds beautify
  • D
    All of these
4
Which of the following is used in the refining of petroleum remove sulphur and other compounds
  • A
    \({{\rm{H}}_{\rm{2}}}{\rm{S}}{{\rm{O}}_{\rm{4}}}\)
    Correct
  • B
    HCl
  • C
    \({\rm{HN}}{{\rm{O}}_{\rm{3}}}\)
  • D
    NaOH
5
Which of the following compound is/are acidic in nature?
  • A
    \({{\rm{C}}_{\rm{3}}}{{\rm{H}}_{\rm{8}}}\)
  • B
    \({\rm{C}}{{\rm{H}}_{\rm{4}}}\)
  • C
    \({{\rm{C}}_{{\rm{12}}}}{{\rm{H}}_{{\rm{22}}}}{{\rm{O}}_{{\rm{11}}}}\)
  • D
    \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{2}}}\)
    Correct
6
Statement A : HCl doesn’t show acidic properties in organic solvent. Statement B : HCl shows acidic properties in aqueous solution.Whicth of the statement is true?
  • A
    Both A and B
    Correct
  • B
    Statement B
  • C
    Statement A
  • D
    Neither A nor B
7
Find the incorrect statement
  • A
    The PH of rainwater is nearly 7
  • B
    The PH of acid rain is nearly 5.6
  • C
    PH of the stomach is approximately 4.5
    Correct
  • D
    Plants grow well in natural soil
8
Bleaching powder is a
  • A
    pale yellow powder
    Correct
  • B
    white crystalline solid
  • C
    transparent crystalline solid
  • D
    greyish white powder
9
Which of the following turns red litmus blue
  • A
    aqueous solution of HCl
  • B
    dry HCl
  • C
    dry \({\rm{N}}{{\rm{H}}_{\rm{3}}}\) gas
  • D
    aqueous solution of \({\rm{N}}{{\rm{H}}_{\rm{3}}}\)
    Correct
10
\({\rm{CaOC}}{{\rm{l}}_{\rm{2}}}\) is chemically
  • A
    Both Chloride of lime and Bleaching powder
    Correct
  • B
    Chloride of lime
  • C
    Bleaching powder
  • D
    Calcium chloride
11
Between dilute and concentrated samples of \({\rm{HN}}{{\rm{O}}_{\rm{3}}}\) which sample of \({\rm{HN}}{{\rm{O}}_{\rm{3}}}\) will have a highly H+ ion concentration?
  • A
    Both have same H+ ion concentration
  • B
    did \({\rm{HN}}{{\rm{O}}_{\rm{3}}}\)
  • C
    conc. \({\rm{HN}}{{\rm{O}}_{\rm{3}}}\)
    Correct
  • D
    no H+ ion is present is \({\rm{HN}}{{\rm{O}}_{\rm{3}}}\)
12
Four solution P, Q, R, S have PH 2, 7, 9, 13 respectively. Which of the above solution will turn phenolphthalein pink?
  • A
    P only
  • B
    S and R
    Correct
  • C
    S only
  • D
    Q and S
13
Statement A : salt formed when an acid reacts with metal is different than the salt formed when a base reacts with metal. Statement B : Acetic acid is a weak acid but ammonia is a strong base.
  • A
    Both Statement A and B are true
  • B
    Neither statement A nor statement B is true
  • C
    Statement A is true, B is false
    Correct
  • D
    Statement A is false, B is true
14
The raw materials that are required for the manufacturing of washing soda by Solvay process.
  • A
    \({\rm{NaCl}},{\rm{ N}}{{\rm{H}}_{\rm{4}}}{\rm{OH}},{\rm{ CaO}}\)
  • B
    \({\rm{N}}{{\rm{H}}_{\rm{4}}}{\rm{OH}},{\rm{CaC}}{{\rm{O}}_{\rm{3}}},{\rm{ NaCl}}\)
  • C
    \({\rm{N}}{{\rm{H}}_{\rm{3}}},{\rm{ CaC}}{{\rm{l}}_{\rm{2}}},{\rm{ CaC}}{{\rm{O}}_{\rm{3}}}\)
  • D
    \({\rm{NaCl}},{\rm{ CaC}}{{\rm{O}}_{\rm{3}}},{\rm{ N}}{{\rm{H}}_{\rm{3}}}\)
    Correct
15
10ml of a solution of NaOH is found to be completely neutralized by 8ml of a given solution of HCl. If we take 20ml of the same solution of NaOH, the amount of HCl solution required to neutralize if will be
  • A
    8ml
  • B
    12ml
  • C
    16ml
    Correct
  • D
    4ml