Chemistry-
General
Easy

Question

Which of the following pair of ions makes the water hard

  1. N a to the power of plus end exponent comma   S O subscript 4 end subscript superscript 2 minus end superscript    
  2. K to the power of plus end exponent comma   H C O subscript 3 end subscript superscript minus end superscript    
  3. C a to the power of 2 plus end exponent comma   N O subscript 3 end subscript superscript minus end superscript    
  4. N H subscript 4 end subscript superscript plus end superscript comma   C l to the power of minus end exponent    

The correct answer is: K to the power of plus end exponent comma   H C O subscript 3 end subscript superscript minus end superscript


    H C O subscript 3 end subscript superscript minus end superscript is main reason of temporary hardness of wate

    Book A Free Demo

    +91

    Grade*

    Related Questions to study

    General
    chemistry-

    Heavy water is compound of

    Heavy water is compound of

    chemistry-General
    General
    chemistry-

    Heavy water is

    D subscript 2 end subscript O in which D equals subscript 1 end subscript H to the power of 2 end exponent

    Heavy water is

    chemistry-General
    D subscript 2 end subscript O in which D equals subscript 1 end subscript H to the power of 2 end exponent
    General
    chemistry-

    Temporary hardness may be removed from water by adding

    Temporary hardness may be removed from water by adding

    chemistry-General
    General
    chemistry-

    Heavy water left parenthesis D subscript 2 end subscript O right parenthesis is

    Heavy water left parenthesis D subscript 2 end subscript O right parenthesis is

    chemistry-General
    General
    chemistry-

    D subscript 2 end subscript O is used more in

    D subscript 2 end subscript O is used more in

    chemistry-General
    General
    chemistry-

    Synthetic detergents are more effective in hard water than soaps because

    Synthetic detergents are more effective in hard water than soaps because

    chemistry-General
    General
    chemistry-

    Hydrogen is not obtained when zinc reacts with

    Z n plus H subscript 2 end subscript O rightwards arrow Z n O plus H subscript 2 end subscript
    Z n plus 2 N a O H rightwards arrow N a subscript 2 end subscript Z n O subscript 2 end subscript plus H subscript 2 end subscript
    Z n plus 2 H C l rightwards arrow Z n C l subscript 2 end subscript plus H subscript 2 end subscript
    Z n plus 2 H subscript 2 end subscript S O subscript 4 end subscript rightwards arrow Z n S O subscript 4 end subscript plus S O subscript 2 end subscript plus 2 H subscript 2 end subscript O

    Hydrogen is not obtained when zinc reacts with

    chemistry-General
    Z n plus H subscript 2 end subscript O rightwards arrow Z n O plus H subscript 2 end subscript
    Z n plus 2 N a O H rightwards arrow N a subscript 2 end subscript Z n O subscript 2 end subscript plus H subscript 2 end subscript
    Z n plus 2 H C l rightwards arrow Z n C l subscript 2 end subscript plus H subscript 2 end subscript
    Z n plus 2 H subscript 2 end subscript S O subscript 4 end subscript rightwards arrow Z n S O subscript 4 end subscript plus S O subscript 2 end subscript plus 2 H subscript 2 end subscript O
    General
    physics

    The escape velocity for a rocket from earth is 11.2kms-1 value on a planet where acceleration due to gravity is double that on earth and diameter of the planet is twice that of earth will be...km-1

    The escape velocity for a rocket from earth is 11.2kms-1 value on a planet where acceleration due to gravity is double that on earth and diameter of the planet is twice that of earth will be...km-1

    physicsGeneral
    General
    physics

    The escape velocity of a sphere of mass m from earth having mass M and Radius R is given by

    The escape velocity of a sphere of mass m from earth having mass M and Radius R is given by

    physicsGeneral
    General
    physics

    A particle falls towards earth from infinity. It's velocity reaching the earth would be……

    A particle falls towards earth from infinity. It's velocity reaching the earth would be……

    physicsGeneral
    General
    physics

    Radius of orbit of satellite of earth is R. Its  K.E is proportional to

    Radius of orbit of satellite of earth is R. Its  K.E is proportional to

    physicsGeneral
    General
    physics

    Energy required to move a body of mass m from an orbit of radius 2R to  3R is

    Energy required to move a body of mass m from an orbit of radius 2R to  3R is

    physicsGeneral
    General
    physics

    A body is projected vertically upwards from the surface of a planet of radius R with a velocity equal to half the escape velocity for that planet. The maximum height attained by the body is….

    A body is projected vertically upwards from the surface of a planet of radius R with a velocity equal to half the escape velocity for that planet. The maximum height attained by the body is….

    physicsGeneral
    General
    physics

    The Gravitational P.E of a body of mas m at the earth's surface is -mg Re. Its gravitational potential energy at a height Re from the earth's surface will be = here (Re is the radius of the earth),

    The Gravitational P.E of a body of mas m at the earth's surface is -mg Re. Its gravitational potential energy at a height Re from the earth's surface will be = here (Re is the radius of the earth),

    physicsGeneral
    General
    physics

    The Gravitational P.E of a body of mas  at the earth's surface is -mg Re. Its gravitational potential energy at a height Re from the earth's surface will be = here (Re is the radius of the earth),

    The Gravitational P.E of a body of mas  at the earth's surface is -mg Re. Its gravitational potential energy at a height Re from the earth's surface will be = here (Re is the radius of the earth),

    physicsGeneral