Chemistry-
General
Easy

Question

Which of the following statements is not correct?

  1. All alcohols are miscible with water
  2. Only lower alcohols are miscible with water
  3. All alcohols are not poisonous
  4. Methanol is not poisonous

The correct answer is: All alcohols are miscible with water

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Related Questions to study

General
maths-

A d j. left parenthesis A B right parenthesis minus left parenthesis A d j. B right parenthesis left parenthesis A d j. A right parenthesis equals

It is obvious.

A d j. left parenthesis A B right parenthesis minus left parenthesis A d j. B right parenthesis left parenthesis A d j. A right parenthesis equals

maths-General
It is obvious.
General
maths-

If A equals open parentheses table row 1 2 0 row 0 1 2 row 2 0 1 end table close parentheses comma then adj A

A equals open square brackets table row 1 2 0 row 0 1 2 row 2 0 1 end table close square brackets,
A subscript 11 end subscript equals 1 comma A subscript 21 end subscript equals negative 2 comma A subscript 31 end subscript equals 4
A subscript 12 end subscript equals 4 comma A subscript 22 end subscript equals 1 comma A subscript 32 end subscript equals negative 2
A subscript 13 end subscript equals negative 2 comma A subscript 23 end subscript equals 4 comma A subscript 33 end subscript equals 1
A d j left parenthesis A right parenthesis equals open square brackets table row 1 cell negative 2 end cell 4 row 4 1 cell negative 2 end cell row cell negative 2 end cell 4 1 end table close square brackets.

If A equals open parentheses table row 1 2 0 row 0 1 2 row 2 0 1 end table close parentheses comma then adj A

maths-General
A equals open square brackets table row 1 2 0 row 0 1 2 row 2 0 1 end table close square brackets,
A subscript 11 end subscript equals 1 comma A subscript 21 end subscript equals negative 2 comma A subscript 31 end subscript equals 4
A subscript 12 end subscript equals 4 comma A subscript 22 end subscript equals 1 comma A subscript 32 end subscript equals negative 2
A subscript 13 end subscript equals negative 2 comma A subscript 23 end subscript equals 4 comma A subscript 33 end subscript equals 1
A d j left parenthesis A right parenthesis equals open square brackets table row 1 cell negative 2 end cell 4 row 4 1 cell negative 2 end cell row cell negative 2 end cell 4 1 end table close square brackets.
General
maths-

Which of the following is not true

Every skew symmetric matrix of odd order is singular. So option (a) is incorrect.

Which of the following is not true

maths-General
Every skew symmetric matrix of odd order is singular. So option (a) is incorrect.
General
maths-

Which one of the following statements is true

If A to the power of ´ end exponent equals A, then order of A to the power of ´ end exponent will be same to order of A. So it is a square matrix.

Which one of the following statements is true

maths-General
If A to the power of ´ end exponent equals A, then order of A to the power of ´ end exponent will be same to order of A. So it is a square matrix.
General
maths-

The inverse of open square brackets table row 1 2 3 row 0 1 2 row 0 0 1 end table close square bracketsis

Let A equals open square brackets table row 1 2 3 row 0 1 2 row 0 0 1 end table close square brackets rightwards double arrow vertical line A vertical line equals 1 left parenthesis 1 plus 0 right parenthesis equals 1
A d j left parenthesis A right parenthesis equals open square brackets table row cell A subscript 11 end subscript end cell cell A subscript 21 end subscript end cell cell A subscript 31 end subscript end cell row cell A subscript 12 end subscript end cell cell A subscript 22 end subscript end cell cell A subscript 32 end subscript end cell row cell A subscript 13 end subscript end cell cell A subscript 23 end subscript end cell cell A subscript 33 end subscript end cell end table close square brackets
A d j left parenthesis A right parenthesis equals open square brackets table row 1 cell negative 2 end cell 1 row 0 1 cell negative 2 end cell row 0 0 1 end table close square brackets
A to the power of negative 1 end exponent equals fraction numerator A d j left parenthesis A right parenthesis over denominator vertical line A vertical line end fraction equals open square brackets table row 1 cell negative 2 end cell 1 row 0 1 cell negative 2 end cell row 0 0 1 end table close square brackets.

The inverse of open square brackets table row 1 2 3 row 0 1 2 row 0 0 1 end table close square bracketsis

maths-General
Let A equals open square brackets table row 1 2 3 row 0 1 2 row 0 0 1 end table close square brackets rightwards double arrow vertical line A vertical line equals 1 left parenthesis 1 plus 0 right parenthesis equals 1
A d j left parenthesis A right parenthesis equals open square brackets table row cell A subscript 11 end subscript end cell cell A subscript 21 end subscript end cell cell A subscript 31 end subscript end cell row cell A subscript 12 end subscript end cell cell A subscript 22 end subscript end cell cell A subscript 32 end subscript end cell row cell A subscript 13 end subscript end cell cell A subscript 23 end subscript end cell cell A subscript 33 end subscript end cell end table close square brackets
A d j left parenthesis A right parenthesis equals open square brackets table row 1 cell negative 2 end cell 1 row 0 1 cell negative 2 end cell row 0 0 1 end table close square brackets
A to the power of negative 1 end exponent equals fraction numerator A d j left parenthesis A right parenthesis over denominator vertical line A vertical line end fraction equals open square brackets table row 1 cell negative 2 end cell 1 row 0 1 cell negative 2 end cell row 0 0 1 end table close square brackets.
General
maths-

The inverse of matrix A equals open square brackets table row 0 1 0 row 1 0 0 row 0 0 1 end table close square bracketsis

A equals open square brackets table row 0 1 0 row 1 0 0 row 0 0 1 end table close square brackets rightwards double arrow vertical line A vertical line equals negative 1 left parenthesis 1 plus 0 right parenthesis equals negative 1
a d j left parenthesis A right parenthesis equals open square brackets table row cell A subscript 11 end subscript end cell cell A subscript 21 end subscript end cell cell A subscript 31 end subscript end cell row cell A subscript 12 end subscript end cell cell A subscript 22 end subscript end cell cell A subscript 32 end subscript end cell row cell A subscript 13 end subscript end cell cell A subscript 23 end subscript end cell cell A subscript 33 end subscript end cell end table close square brackets
fraction numerator left parenthesis negative 1 right parenthesis to the power of 3 plus 2 end exponent M subscript 32 end subscript over denominator negative 2 end fraction comma text end text equals fraction numerator negative left parenthesis negative 2 right parenthesis over denominator negative 2 end fraction equals negative 1 A subscript 11 end subscript equals 0 comma A subscript 12 end subscript equals negative 1 comma A subscript 13 end subscript equals 0
A subscript 21 end subscript equals negative 1 comma A subscript 22 end subscript equals 0 comma A subscript 23 end subscript equals 0
A subscript 31 end subscript equals 0, A subscript 32 end subscript equals 0 comma A subscript 33 end subscript equals negative 1
fraction numerator left parenthesis negative 1 right parenthesis to the power of 3 plus 2 end exponent M subscript 32 end subscript over denominator negative 2 end fraction comma text end text equals fraction numerator negative left parenthesis negative 2 right parenthesis over denominator negative 2 end fraction equals negative 1 blank A to the power of negative 1 end exponent equals fraction numerator a d j left parenthesis A right parenthesis over denominator vertical line A vertical line end fraction equals open square brackets table row 0 1 0 row 1 0 0 row 0 0 1 end table close square brackets equals A.

The inverse of matrix A equals open square brackets table row 0 1 0 row 1 0 0 row 0 0 1 end table close square bracketsis

maths-General
A equals open square brackets table row 0 1 0 row 1 0 0 row 0 0 1 end table close square brackets rightwards double arrow vertical line A vertical line equals negative 1 left parenthesis 1 plus 0 right parenthesis equals negative 1
a d j left parenthesis A right parenthesis equals open square brackets table row cell A subscript 11 end subscript end cell cell A subscript 21 end subscript end cell cell A subscript 31 end subscript end cell row cell A subscript 12 end subscript end cell cell A subscript 22 end subscript end cell cell A subscript 32 end subscript end cell row cell A subscript 13 end subscript end cell cell A subscript 23 end subscript end cell cell A subscript 33 end subscript end cell end table close square brackets
fraction numerator left parenthesis negative 1 right parenthesis to the power of 3 plus 2 end exponent M subscript 32 end subscript over denominator negative 2 end fraction comma text end text equals fraction numerator negative left parenthesis negative 2 right parenthesis over denominator negative 2 end fraction equals negative 1 A subscript 11 end subscript equals 0 comma A subscript 12 end subscript equals negative 1 comma A subscript 13 end subscript equals 0
A subscript 21 end subscript equals negative 1 comma A subscript 22 end subscript equals 0 comma A subscript 23 end subscript equals 0
A subscript 31 end subscript equals 0, A subscript 32 end subscript equals 0 comma A subscript 33 end subscript equals negative 1
fraction numerator left parenthesis negative 1 right parenthesis to the power of 3 plus 2 end exponent M subscript 32 end subscript over denominator negative 2 end fraction comma text end text equals fraction numerator negative left parenthesis negative 2 right parenthesis over denominator negative 2 end fraction equals negative 1 blank A to the power of negative 1 end exponent equals fraction numerator a d j left parenthesis A right parenthesis over denominator vertical line A vertical line end fraction equals open square brackets table row 0 1 0 row 1 0 0 row 0 0 1 end table close square brackets equals A.
General
chemistry-

 A space a n d space B respectively are

 A space a n d space B respectively are

chemistry-General
General
physics-

Light is incident normally in face AB of a prism as shown in figure A liquid of refractive index m is placed on face AC of the prism The prism is made of glass of refractive index 3/2 The limits of m for which total internal reflection takes place on face AC is

Light is incident normally in face AB of a prism as shown in figure A liquid of refractive index m is placed on face AC of the prism The prism is made of glass of refractive index 3/2 The limits of m for which total internal reflection takes place on face AC is

physics-General
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physics-

An observer can see through a pin-hole the top end of a thin rod of height h, placed as shown in the figure The beaker height is 3h and its radius h When the beaker is filled with a liquid up to height 2h, he can see the lower end of the rod Then the refractive index of the liquid is

An observer can see through a pin-hole the top end of a thin rod of height h, placed as shown in the figure The beaker height is 3h and its radius h When the beaker is filled with a liquid up to height 2h, he can see the lower end of the rod Then the refractive index of the liquid is

physics-General
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physics-

A rectangular glass slab ABCD of refractive index n1 is immersed in water of refractive index n subscript 2 end subscript open parentheses n subscript 1 end subscript greater than n subscript 2 end subscript close parentheses A ray of light is incident a the surface AB of the slab as shown The maximum value of the angle of incidence amax, such that the ray comes out only from the other surface CD, is given by

A rectangular glass slab ABCD of refractive index n1 is immersed in water of refractive index n subscript 2 end subscript open parentheses n subscript 1 end subscript greater than n subscript 2 end subscript close parentheses A ray of light is incident a the surface AB of the slab as shown The maximum value of the angle of incidence amax, such that the ray comes out only from the other surface CD, is given by

physics-General
General
physics-

A light ray traveling in glass medium is incident on glass-air interface at an angle of incidence q The reflected (R) and transmitted (T) intensitites, both as function of q , are plotted The correct sketch is

A light ray traveling in glass medium is incident on glass-air interface at an angle of incidence q The reflected (R) and transmitted (T) intensitites, both as function of q , are plotted The correct sketch is

physics-General
General
physics-

A point source S is placed at the bottom of different layers as shown in the figure The refractive index of bottom most layer is m0 The refractive index of any other upper layer is mu subscript left parenthesis n right parenthesis end subscript equals mu subscript 0 end subscript minus fraction numerator mu subscript 0 end subscript over denominator 4 n minus 18 end fraction text  where  end text n equals 1 comma 2 comma horizontal ellipsis horizontal ellipsis A ray of light with angle i slightly more than 30° starts from the source S Total internal reflection takes place at the upper surface of a layer having n equal to

A point source S is placed at the bottom of different layers as shown in the figure The refractive index of bottom most layer is m0 The refractive index of any other upper layer is mu subscript left parenthesis n right parenthesis end subscript equals mu subscript 0 end subscript minus fraction numerator mu subscript 0 end subscript over denominator 4 n minus 18 end fraction text  where  end text n equals 1 comma 2 comma horizontal ellipsis horizontal ellipsis A ray of light with angle i slightly more than 30° starts from the source S Total internal reflection takes place at the upper surface of a layer having n equal to

physics-General
General
physics-

An insect starts moving up in a liquid from point O of variable refractive index mu equals mu subscript 0 end subscript left parenthesis 1 plus a y right parenthesis where y is depth of liquid from the surface If u is the speed of insect, its apparent speed to the observer E immediatly after insect start moving

An insect starts moving up in a liquid from point O of variable refractive index mu equals mu subscript 0 end subscript left parenthesis 1 plus a y right parenthesis where y is depth of liquid from the surface If u is the speed of insect, its apparent speed to the observer E immediatly after insect start moving

physics-General
General
maths-

If A equals open square brackets table row 1 cell negative 2 end cell row 5 3 end table close square brackets, then A plus A to the power of T end exponentequals

A to the power of T end exponent equals open square brackets table row 1 5 row cell negative 2 end cell 3 end table close square brackets comma A plus A to the power of T end exponent equals open square brackets table row 2 3 row 3 6 end table close square brackets.

If A equals open square brackets table row 1 cell negative 2 end cell row 5 3 end table close square brackets, then A plus A to the power of T end exponentequals

maths-General
A to the power of T end exponent equals open square brackets table row 1 5 row cell negative 2 end cell 3 end table close square brackets comma A plus A to the power of T end exponent equals open square brackets table row 2 3 row 3 6 end table close square brackets.
General
maths-

The inverse of the matrix open square brackets table row 3 cell negative 2 end cell row 1 4 end table close square bracketsis

Let A equals open square brackets table row 3 cell negative 2 end cell row 1 4 end table close square brackets rightwards double arrow vertical line A vertical line equals 14
therefore a d j A equals open square brackets table row 4 2 row cell negative 1 end cell 3 end table close square brackets rightwards double arrow A to the power of negative 1 end exponent equals open square brackets table row cell fraction numerator 4 over denominator 14 end fraction end cell cell fraction numerator 2 over denominator 14 end fraction end cell row cell fraction numerator negative 1 over denominator 14 end fraction end cell cell fraction numerator 3 over denominator 14 end fraction end cell end table close square brackets.

The inverse of the matrix open square brackets table row 3 cell negative 2 end cell row 1 4 end table close square bracketsis

maths-General
Let A equals open square brackets table row 3 cell negative 2 end cell row 1 4 end table close square brackets rightwards double arrow vertical line A vertical line equals 14
therefore a d j A equals open square brackets table row 4 2 row cell negative 1 end cell 3 end table close square brackets rightwards double arrow A to the power of negative 1 end exponent equals open square brackets table row cell fraction numerator 4 over denominator 14 end fraction end cell cell fraction numerator 2 over denominator 14 end fraction end cell row cell fraction numerator negative 1 over denominator 14 end fraction end cell cell fraction numerator 3 over denominator 14 end fraction end cell end table close square brackets.