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Chemistry-

General

Easy

Question

Synthetic detergents are more effective in hard water than soaps because

They are highly soluble in water
Their $C a^{+ +}$ and $M g^{+ +}$ salts are water soluble
Their $C a^{+ +}$ and $M g^{+ +}$ salts are insoluble in water
None of these

The correct answer is: Their $C a to the power of plus plus end exponent$ and $M g to the power of plus plus end exponent$ salts are water soluble

Related Questions to study

Hydrogen is not obtained when zinc reacts with

Hydrogen is not obtained when zinc reacts with

chemistry-General

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

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

parallel

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……

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

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

parallel

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….

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),

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),

parallel

Escape velocity of a body of 1 kg. on a planet is 100ms^-1 . Gravitational potential energy of the body at the planet is =.....j

Escape velocity of a body of 1 kg. on a planet is 100ms^-1 . Gravitational potential energy of the body at the planet is =.....j

What is the intensity of gravitational field at the center of spherical shell

What is the intensity of gravitational field at the center of spherical shell

A rocket is launched with velocity 10 $k m s to the power of negative 1 end exponent$ . If radius of earth is R then maximum height attained by it will be =…….

A rocket is launched with velocity 10 $k m s to the power of negative 1 end exponent$ . If radius of earth is R then maximum height attained by it will be =…….

parallel

The masses and radius of earth and moon are M₁ ,R₁and M₂ R₂respectively. Their centres are d distance of apart. The minimum velocity with which a particle of mass should be projected from a point mid way between their centres so that it escapes to infinity is……

The masses and radius of earth and moon are M₁ ,R₁and M₂ R₂respectively. Their centres are d distance of apart. The minimum velocity with which a particle of mass should be projected from a point mid way between their centres so that it escapes to infinity is……

If P= $fraction numerator A to the power of 2 end exponent B over denominator C to the power of 3 end exponent end fraction$ where percentage error in $A comma B$ and $C$ are respectively $plus 2 percent sign plus-or-minus 3 percent sign$ and $plus-or-minus 5 percent sign$ then total percentage error in measurement of $p$

If P= $fraction numerator A to the power of 2 end exponent B over denominator C to the power of 3 end exponent end fraction$ where percentage error in $A comma B$ and $C$ are respectively $plus 2 percent sign plus-or-minus 3 percent sign$ and $plus-or-minus 5 percent sign$ then total percentage error in measurement of $p$

physics-General

The mass of the earth is 6.00 $cross times 10 to the power of 24$ Kg and that of the moon is 7.40 $cross times 10 to the power of 22$ kg. The constant of gravitation G=6.667 $cross times 10 negative 11 to the power of blank$ Nm^-2 kg^--2.The potential energy of the system is -7.79 $cross times 10 to the power of 28$ Joules. the mean distance between the earth and moon is =

The mass of the earth is 6.00 $cross times 10 to the power of 24$ Kg and that of the moon is 7.40 $cross times 10 to the power of 22$ kg. The constant of gravitation G=6.667 $cross times 10 negative 11 to the power of blank$ Nm^-2 kg^--2.The potential energy of the system is -7.79 $cross times 10 to the power of 28$ Joules. the mean distance between the earth and moon is =

parallel

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