Chemistry-
General
Easy

Question

Which of the following is an intermolecular redox reaction?

The correct answer is:

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In which of the following processes is nitrogen oxidised?

In which of the following processes is nitrogen oxidised?

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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-

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

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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
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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
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chemistry-

Which of following is not a disproportionation reaction?

Which of following is not a disproportionation reaction?

chemistry-General
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General
maths-

Consider a continuous function f colon left square bracket 0 comma infinity right parenthesis rightwards arrow left square bracket 0 comma infinity right parenthesis space i f space f left parenthesis a b right parenthesis equals f left parenthesis a right parenthesis f left parenthesis b right parenthesis spacefor all a, b in the domain of ‘f’ and L i m left parenthesis x rightwards arrow infinity right parenthesis space f left parenthesis x right parenthesis is a non zero finite number then

Consider a continuous function f colon left square bracket 0 comma infinity right parenthesis rightwards arrow left square bracket 0 comma infinity right parenthesis space i f space f left parenthesis a b right parenthesis equals f left parenthesis a right parenthesis f left parenthesis b right parenthesis spacefor all a, b in the domain of ‘f’ and L i m left parenthesis x rightwards arrow infinity right parenthesis space f left parenthesis x right parenthesis is a non zero finite number then

maths-General
General
physics-

The figure shows four pairs of polarizing sheets, seen face-on. Each pair is mounted in the path of initially unpolarized light. The polarizing direction of each sheet (indicated by the dashed line) is referenced to either a horizontal x-axis or a vertical y axis. Rank the pair according to the fraction of the initial intensity that they pass, greatest first

The figure shows four pairs of polarizing sheets, seen face-on. Each pair is mounted in the path of initially unpolarized light. The polarizing direction of each sheet (indicated by the dashed line) is referenced to either a horizontal x-axis or a vertical y axis. Rank the pair according to the fraction of the initial intensity that they pass, greatest first

physics-General
General
physics-

The figure here gives the electric field of an EM wave at a certain point and a certain instant. The wave is transporting energy in the negative z direction. What is the direction of the magnetic field of the wave at that point and instant

The figure here gives the electric field of an EM wave at a certain point and a certain instant. The wave is transporting energy in the negative z direction. What is the direction of the magnetic field of the wave at that point and instant

physics-General
parallel
General
physics-

In the set up shown in Fig the two slits, S subscript 1 end subscriptand S subscript 2 end subscript are not equidistant from the slit S. The central fringe at O is then

In the set up shown in Fig the two slits, S subscript 1 end subscriptand S subscript 2 end subscript are not equidistant from the slit S. The central fringe at O is then

physics-General
General
physics-

In a Young’s double slit experimental arrangement shown here, if a mica sheet of thickness t and refractive index mu is placed in front of the slit S subscript 1 end subscript comma then the path difference left parenthesis S subscript 1 end subscript P minus S subscript 2 end subscript P right parenthesis

In a Young’s double slit experimental arrangement shown here, if a mica sheet of thickness t and refractive index mu is placed in front of the slit S subscript 1 end subscript comma then the path difference left parenthesis S subscript 1 end subscript P minus S subscript 2 end subscript P right parenthesis

physics-General
General
chemistry-

The compound (A) is :

The compound (A) is :

chemistry-General
parallel
General
chemistry-

text  (A)  end text open parentheses straight C subscript 8 straight H subscript 14 close parentheses stack not stretchy rightwards arrow with left square bracket 0 right square bracket on top with text  Acidic KMnO  end text subscript 4 below left parenthesis straight B right parenthesis plus left parenthesis straight C right parenthesis plus left parenthesis straight D right parenthesis

A) Requires 2 mol of straight H subscript 2 for its saturation
B) Reduces ammoniacal AgNO subscript 3 and gives yellow colour with NaOH plus straight I subscript 2
C) does not reduce Tollens reagent but gives iodoform test
D) n dehydration with conc. straight H subscript 2 SO subscript 4 gives a mixture of colourless gases

The compound (A) is:


 

text  (A)  end text open parentheses straight C subscript 8 straight H subscript 14 close parentheses stack not stretchy rightwards arrow with left square bracket 0 right square bracket on top with text  Acidic KMnO  end text subscript 4 below left parenthesis straight B right parenthesis plus left parenthesis straight C right parenthesis plus left parenthesis straight D right parenthesis

A) Requires 2 mol of straight H subscript 2 for its saturation
B) Reduces ammoniacal AgNO subscript 3 and gives yellow colour with NaOH plus straight I subscript 2
C) does not reduce Tollens reagent but gives iodoform test
D) n dehydration with conc. straight H subscript 2 SO subscript 4 gives a mixture of colourless gases

The compound (A) is:


 

chemistry-General
General
chemistry-

text  (A)  end text straight A open parentheses straight C subscript 7 straight H subscript 14 close parentheses not stretchy ⟶ with straight O subscript 3 divided by text  Red  end text on top straight B open parentheses straight C subscript 3 straight H subscript 6 straight O close parentheses plus straight C left parenthesis straight B right parenthesis Gives positive Tollens test but negative iodoform test (C) Gives negative Tollens test but positive iodoform test The compound (A) is:

text  (A)  end text straight A open parentheses straight C subscript 7 straight H subscript 14 close parentheses not stretchy ⟶ with straight O subscript 3 divided by text  Red  end text on top straight B open parentheses straight C subscript 3 straight H subscript 6 straight O close parentheses plus straight C left parenthesis straight B right parenthesis Gives positive Tollens test but negative iodoform test (C) Gives negative Tollens test but positive iodoform test The compound (A) is:

chemistry-General
General
chemistry-

Redox equations are balanced either by ion-electron method or by oxidation number method. Both methods lead to the correct from of the balanced equation. The ion electron method has two advantages. So some chemists prefer to use the ion-electron method for redox reactions carried out in dilute aqueous solutions, where free ions have more or less independent existence The oxidation state method for redox reactions is mostly used for solid chemicals or for reactions in concentrated acid media For the reaction  straight K subscript 4 open square brackets Fe left parenthesis CN right parenthesis subscript 6 close square brackets not stretchy rightwards arrow Fe to the power of 3 plus end exponent plus CO subscript 2 plus NO subscript 3 superscript ⊖ The -factor is

Redox equations are balanced either by ion-electron method or by oxidation number method. Both methods lead to the correct from of the balanced equation. The ion electron method has two advantages. So some chemists prefer to use the ion-electron method for redox reactions carried out in dilute aqueous solutions, where free ions have more or less independent existence The oxidation state method for redox reactions is mostly used for solid chemicals or for reactions in concentrated acid media For the reaction  straight K subscript 4 open square brackets Fe left parenthesis CN right parenthesis subscript 6 close square brackets not stretchy rightwards arrow Fe to the power of 3 plus end exponent plus CO subscript 2 plus NO subscript 3 superscript ⊖ The -factor is

chemistry-General
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