Chemistry-
General
Easy

Question

Statement-1 :Lead, tin and bismuth are purified by liquation method.
Statement-2 : Lead, tin and bismuth have low m.p. as compared to impurities

  1. Statement-1 is true, Statement-2 is true and Statement-2 is correct explanation for Statement-1.    
  2. Statement-1 is true, Statement-2 is true and Statement-2 is not correct explanation for Statement-1.    
  3. Statement-1 is true, Statement-2 is false.    
  4. Statement-1 is false, Statement-2 is true.    

The correct answer is: Statement-1 is true, Statement-2 is true and Statement-2 is correct explanation for Statement-1.

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Statement-1 :In the extraction of Ag the complex Na[Ag(CN)2] is reacted with Zn
Statement-2 :Zn is transition metal according to electronic theory

Statement-1 :In the extraction of Ag the complex Na[Ag(CN)2] is reacted with Zn
Statement-2 :Zn is transition metal according to electronic theory

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Statement-1 : During calcination the ore is heated well below its melting point in the limited supply of air or absence of air.
Statement-2 : The process of calcination is carried out for sulphide ores.

Statement-1 : During calcination the ore is heated well below its melting point in the limited supply of air or absence of air.
Statement-2 : The process of calcination is carried out for sulphide ores.

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The iron obtained from the blast furnace is called :

The iron obtained from the blast furnace is called :

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The process of bringing the metal or its ore into solution by the action of a suitable chemical reagent followed by extraction of the metal either by electrolysis or by a suitable precipitating agent i.e. more electropositive metal is called

The process of bringing the metal or its ore into solution by the action of a suitable chemical reagent followed by extraction of the metal either by electrolysis or by a suitable precipitating agent i.e. more electropositive metal is called

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In the froth floatation process for the purification of minerals the particles float because :

In the froth floatation process for the purification of minerals the particles float because :

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Statement‐I: The function f left parenthesis x right parenthesis equals not stretchy integral subscript 0 end subscript superscript x end superscript square root of 1 plus t to the power of 2 end exponent end root d t is an odd function and g left parenthesis x right parenthesis equals f to the power of ’ end exponent left parenthesis x right parenthesis is an even function.
Statement‐II: For a differentiable function f left parenthesis x right parenthesis if f to the power of ’ end exponent left parenthesis x right parenthesis is an even function then f left parenthesis x right parenthesis is an odd function.

Statement‐I: The function f left parenthesis x right parenthesis equals not stretchy integral subscript 0 end subscript superscript x end superscript square root of 1 plus t to the power of 2 end exponent end root d t is an odd function and g left parenthesis x right parenthesis equals f to the power of ’ end exponent left parenthesis x right parenthesis is an even function.
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Statement‐I:: not stretchy integral subscript blank superscript blank 2 to the power of t a n to the power of negative 1 end exponent x end exponent d left parenthesis c o t to the power of negative 1 end exponent x right parenthesis equals fraction numerator 2 to the power of t w to the power of negative 1 end exponent x end exponent over denominator l n 2 end fraction plus c
Statement‐II : fraction numerator d over denominator d x end fraction left parenthesis a to the power of x end exponent plus c right parenthesis equals a to the power of x end exponent l n a

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The value of not stretchy integral subscript blank superscript blank blank x. fraction numerator l n left parenthesis x plus square root of 1 plus x to the power of 2 end exponent end root right parenthesis over denominator square root of 1 plus x to the power of 2 end exponent end root end fraction d x equals:

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