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Chemistry-

General

Easy

Question

The order of reactivity of following alcohols, towards conc. HCl is:
i)
ii)
iii)
iv)

I>II>III>IV
I>III>II>IV
IV>III>II>I
IV>III>I>II

The correct answer is: IV>III>II>I

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In the following compounds piperidine
I) pyridine
II) morpho line
III) and pyrrole
IV) the order of basicity is:

In the following compounds piperidine
I) pyridine
II) morpho line
III) and pyrrole
IV) the order of basicity is:

Chemistry-General

If $blank f blank open square brackets x close square brackets$ denotes the greatestinterger not exceeding x and if the function f defined by $blank f open parentheses x close parentheses equals open curly brackets table row cell fraction numerator a plus 2 blank c o s blank x over denominator x to the power of 2 end exponent end fraction blank left parenthesis x less than 0 right parenthesis end cell row cell b blank t a n fraction numerator pi over denominator left square bracket x plus 4 right square bracket end fraction text end text text ( end text text x end text greater or equal than 0 text ) end text text end text end cell end table close text is continuous at end text x equals 0 text then end text$ the order pair (a,b)=

If $blank f blank open square brackets x close square brackets$ denotes the greatestinterger not exceeding x and if the function f defined by $blank f open parentheses x close parentheses equals open curly brackets table row cell fraction numerator a plus 2 blank c o s blank x over denominator x to the power of 2 end exponent end fraction blank left parenthesis x less than 0 right parenthesis end cell row cell b blank t a n fraction numerator pi over denominator left square bracket x plus 4 right square bracket end fraction text end text text ( end text text x end text greater or equal than 0 text ) end text text end text end cell end table close text is continuous at end text x equals 0 text then end text$ the order pair (a,b)=

$L e t blank a comma b blank element of R comma blank open parentheses a not equal to 0 close parentheses. blank I f blank t h e blank f u n c t i o n blank f blank d e f i n e d blank a s blank f open parentheses x close parentheses equals blank open curly brackets table row cell fraction numerator 2 x to the power of 2 end exponent over denominator a end fraction end cell cell 0 less or equal than x less than 1 end cell row a cell 1 less or equal than x less than square root of 2 end cell row cell fraction numerator 2 b to the power of 2 end exponent minus 4 b over denominator x to the power of 3 end exponent end fraction end cell cell square root of 2 less or equal than x less than 8 end cell end table close blank$ is continuous in the interval [0, $straight infinity$ ) then an ordered pair (a, b) is

$L e t blank a comma b blank element of R comma blank open parentheses a not equal to 0 close parentheses. blank I f blank t h e blank f u n c t i o n blank f blank d e f i n e d blank a s blank f open parentheses x close parentheses equals blank open curly brackets table row cell fraction numerator 2 x to the power of 2 end exponent over denominator a end fraction end cell cell 0 less or equal than x less than 1 end cell row a cell 1 less or equal than x less than square root of 2 end cell row cell fraction numerator 2 b to the power of 2 end exponent minus 4 b over denominator x to the power of 3 end exponent end fraction end cell cell square root of 2 less or equal than x less than 8 end cell end table close blank$ is continuous in the interval [0, $straight infinity$ ) then an ordered pair (a, b) is

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Mosley measured the frequency (f) of the characteristic X-rays from many metals of different atomic number (Z) and represented his results by a relation known as Mosley's law. This law is (a, b are constants)

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Physics-General

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Physics-General

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If the function $f open parentheses x close parentheses equals open curly brackets table row cell blank end cell row cell fraction numerator square root of 2 plus c o s blank x end root minus 1 over denominator left parenthesis pi minus x right parenthesis to the power of 2 end exponent end fraction blank comma x not equal to pi end cell row cell k blank comma x equals pi end cell end table close$ is continuous at x= $pi comma blank$ then k equals

If the function $f open parentheses x close parentheses equals open curly brackets table row cell blank end cell row cell fraction numerator square root of 2 plus c o s blank x end root minus 1 over denominator left parenthesis pi minus x right parenthesis to the power of 2 end exponent end fraction blank comma x not equal to pi end cell row cell k blank comma x equals pi end cell end table close$ is continuous at x= $pi comma blank$ then k equals

The function $f open parentheses x close parentheses equals open vertical bar 2 s g n blank 2 x close vertical bar plus 2$ has

The function $f open parentheses x close parentheses equals open vertical bar 2 s g n blank 2 x close vertical bar plus 2$ has

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