Chemistry-
General
Easy

Question

Helium was discovered by:

  1. Frankland and Lockyer
  2. Rayleigh
  3. Ramsay
  4. None of these

The correct answer is: Frankland and Lockyer


    It Is a fact.

    Related Questions to study

    General
    chemistry-

    For a general reaction given, below the value of solubility product can be given as :

    K subscript s p end subscript equals left parenthesis x s right parenthesis to the power of X end exponent times left parenthesis y s right parenthesis to the power of y end exponent or K subscript s p end subscript equals x to the power of x end exponent y to the power of y end exponent left parenthesis S right parenthesis to the power of x plus y end exponent
    Solubility product gives us not only an idea about the solubility of an electrolyte in a solvent but also helps in explaining concept of precipitation and calculation of H+ ion, OH- ion. It is also useful in qualitative analysis for the identification and separation of basic radicals.
    Which metal sulphides can be precipitated from a solution that is 0.01 M in Na+ , Zn2+, Pb2+ and Cu2+ and 0.10 M in H2S at a pH of 1.0 ?

    For a general reaction given, below the value of solubility product can be given as :

    K subscript s p end subscript equals left parenthesis x s right parenthesis to the power of X end exponent times left parenthesis y s right parenthesis to the power of y end exponent or K subscript s p end subscript equals x to the power of x end exponent y to the power of y end exponent left parenthesis S right parenthesis to the power of x plus y end exponent
    Solubility product gives us not only an idea about the solubility of an electrolyte in a solvent but also helps in explaining concept of precipitation and calculation of H+ ion, OH- ion. It is also useful in qualitative analysis for the identification and separation of basic radicals.
    Which metal sulphides can be precipitated from a solution that is 0.01 M in Na+ , Zn2+, Pb2+ and Cu2+ and 0.10 M in H2S at a pH of 1.0 ?

    chemistry-General
    General
    chemistry-

    A weak acid (or base) is titrated against a strong base (or acid), volume v of strong base (or acid) is plotted against pH of the solution. The weak protolyte i.e acid (or base) could be

    A weak acid (or base) is titrated against a strong base (or acid), volume v of strong base (or acid) is plotted against pH of the solution. The weak protolyte i.e acid (or base) could be

    chemistry-General
    General
    maths-

    Let A = open square brackets table row 0 cell 2 y end cell z row x y cell negative z end cell row x cell negative y end cell z end table close square brackets and A' . A = I, then the value of x to the power of 2 end exponent plus y to the power of 2 end exponent plus z to the power of 2 end exponent is -

    Let A = open square brackets table row 0 cell 2 y end cell z row x y cell negative z end cell row x cell negative y end cell z end table close square brackets and A' . A = I, then the value of x to the power of 2 end exponent plus y to the power of 2 end exponent plus z to the power of 2 end exponent is -

    maths-General
    parallel
    General
    maths-

    If A is a n rowed square matrix, A = [aij] where aij =open square brackets fraction numerator i over denominator j end fraction close square brackets, [ ] denotes greatest integer, then det (A) =

    If A is a n rowed square matrix, A = [aij] where aij =open square brackets fraction numerator i over denominator j end fraction close square brackets, [ ] denotes greatest integer, then det (A) =

    maths-General
    General
    maths-

    If A = open square brackets table row 0 5 row 0 0 end table close square brackets and f(x) = 1 + x + x2 + … + x16, then f(A) =

    If A = open square brackets table row 0 5 row 0 0 end table close square brackets and f(x) = 1 + x + x2 + … + x16, then f(A) =

    maths-General
    General
    maths-

    Assertion : The expression n!(20 – n)! is minimum when n = 10.
    Reason : blank to the power of 2 straight m end exponent C subscript r  is maximum when r = m.

    Assertion : The expression n!(20 – n)! is minimum when n = 10.
    Reason : blank to the power of 2 straight m end exponent C subscript r  is maximum when r = m.

    maths-General
    parallel
    General
    Maths-

    Let a matrix A = open square brackets table row 1 1 row 0 1 end table close square brackets & P =open square brackets table row cell fraction numerator square root of 3 over denominator 2 end fraction end cell cell fraction numerator 1 over denominator 2 end fraction end cell row cell negative fraction numerator 1 over denominator 2 end fraction end cell cell fraction numerator square root of 3 over denominator 2 end fraction end cell end table close square brackets Q = PAPT where PT is transpose of matrix P. Find PT Q2005 P is

    an invertible matrix gives identity matrix as the product when multiplied with its inverse.

    Let a matrix A = open square brackets table row 1 1 row 0 1 end table close square brackets & P =open square brackets table row cell fraction numerator square root of 3 over denominator 2 end fraction end cell cell fraction numerator 1 over denominator 2 end fraction end cell row cell negative fraction numerator 1 over denominator 2 end fraction end cell cell fraction numerator square root of 3 over denominator 2 end fraction end cell end table close square brackets Q = PAPT where PT is transpose of matrix P. Find PT Q2005 P is

    Maths-General

    an invertible matrix gives identity matrix as the product when multiplied with its inverse.

    General
    Maths-

    Let A =open square brackets table row 1 0 0 row 0 1 1 row 0 cell negative 2 end cell 4 end table close square brackets& I =open square brackets table row 1 0 0 row 0 1 0 row 0 0 1 end table close square brackets and A-1= fraction numerator 1 over denominator 6 end fraction [A2+CA+dI], find ordered pair (c,d) ?

    the roots of the characteristic equation give us the eigenvalues of the matrix.

    Let A =open square brackets table row 1 0 0 row 0 1 1 row 0 cell negative 2 end cell 4 end table close square brackets& I =open square brackets table row 1 0 0 row 0 1 0 row 0 0 1 end table close square brackets and A-1= fraction numerator 1 over denominator 6 end fraction [A2+CA+dI], find ordered pair (c,d) ?

    Maths-General

    the roots of the characteristic equation give us the eigenvalues of the matrix.

    General
    chemistry-

    Which of the following is an intermolecular redox reaction?

    Which of the following is an intermolecular redox reaction?

    chemistry-General
    parallel
    General
    chemistry-

    In which of the following processes is nitrogen oxidised?

    In which of the following processes is nitrogen oxidised?

    chemistry-General
    General
    Maths-

    Which one of the following statements, is true-

    A square matrix is one whose number of rows are equal to the number of columns.

    Which one of the following statements, is true-

    Maths-General

    A square matrix is one whose number of rows are equal to the number of columns.

    General
    Maths-

    If A = open square brackets table row cell cos invisible function application alpha end cell cell sin invisible function application alpha end cell row cell negative sin invisible function application alpha end cell cell cos invisible function application alpha end cell end table close square bracketsand A adj A = open square brackets table row k 0 row 0 k end table close square brackets, then k is equal to -

    adjoint of a matrix is the transpose of the cofactor matrix of that matrix. cofactors are the resultant numbers when the corresponding row and column of an element is removed from the matrix.

    If A = open square brackets table row cell cos invisible function application alpha end cell cell sin invisible function application alpha end cell row cell negative sin invisible function application alpha end cell cell cos invisible function application alpha end cell end table close square bracketsand A adj A = open square brackets table row k 0 row 0 k end table close square brackets, then k is equal to -

    Maths-General

    adjoint of a matrix is the transpose of the cofactor matrix of that matrix. cofactors are the resultant numbers when the corresponding row and column of an element is removed from the matrix.

    parallel
    General
    Maths-

    If Aαβ=open square brackets table row cell cos invisible function application alpha end cell cell sin invisible function application alpha end cell row cell negative sin invisible function application alpha end cell cell cos invisible function application alpha end cell end table close square brackets, then which of following statement is true -

    If Aαβ=open square brackets table row cell cos invisible function application alpha end cell cell sin invisible function application alpha end cell row cell negative sin invisible function application alpha end cell cell cos invisible function application alpha end cell end table close square brackets, then which of following statement is true -

    Maths-General
    General
    maths-

    If f left parenthesis x right parenthesis equals vertical line vertical line sin left parenthesis vertical line x vertical line minus 1 right parenthesis vertical line minus 2 vertical line spacethen

    If f left parenthesis x right parenthesis equals vertical line vertical line sin left parenthesis vertical line x vertical line minus 1 right parenthesis vertical line minus 2 vertical line spacethen

    maths-General
    General
    chemistry-

    Which of following is not a disproportionation reaction?

    Which of following is not a disproportionation reaction?

    chemistry-General
    parallel

    card img

    With Turito Academy.

    card img

    With Turito Foundation.

    card img

    Get an Expert Advice From Turito.

    Turito Academy

    card img

    With Turito Academy.

    Test Prep

    card img

    With Turito Foundation.