Maths-
General
Easy
Question
In a packet of 40 pens, 12 are red. So, what % age are red pens?
- 33%
- 27%
- 30%
- 21%
The correct answer is: 30%
Given:- Total no. of pens =40.
Number of a red pens =12
% age of red pens =
×100


Related Questions to study
Chemistry-
Consider the following compounds, which of these will release CO2 with 5% NaHCO3 ?
i) 
ii) 
iii) 
- (i) and (ii)
- (i) and (iii)
- (i),(ii) and (iii)
- (ii) and (iii)
Consider the following compounds, which of these will release CO2 with 5% NaHCO3 ?
i) 
ii) 
iii) 
Chemistry-General
- (i) and (ii)
- (i) and (iii)
- (i),(ii) and (iii)
- (ii) and (iii)
Chemistry-
Identify the product' Y' in the following reaction sequence:

- cyclobutane
- cyclopentane
- pentane
- cyclopentanone
Identify the product' Y' in the following reaction sequence:

Chemistry-General
- cyclobutane
- cyclopentane
- pentane
- cyclopentanone
Chemistry-
In homogeneous catalytic reactions, there are three alternative paths A,B and C (shown in the figure) which one of the following indicates the relative ease with which the reaction can take place?

In homogeneous catalytic reactions, there are three alternative paths A,B and C (shown in the figure) which one of the following indicates the relative ease with which the reaction can take place?

Chemistry-General
Chemistry-
In a spontaneous adsorption process
- ΔH is positive
- ΔH is zero
- all the above
- ΔH is sufficiently negative
In a spontaneous adsorption process
Chemistry-General
- ΔH is positive
- ΔH is zero
- all the above
- ΔH is sufficiently negative
Chemistry-
Graph between log
and log P is a straight line at angle 0 45 with intercept OA as shown Hence ,
at a pressure of 2 atm is

- 2
- 1
- 8
- 4
Graph between log
and log P is a straight line at angle 0 45 with intercept OA as shown Hence ,
at a pressure of 2 atm is

Chemistry-General
- 2
- 1
- 8
- 4
Maths-
If
and
then
If
and
then
Maths-General
Maths-
Assertion : For
the volume of the parallel piped formed by vectors
and
is maximum (The vectors form a right-handed system)
Reason: The volume of the parallel piped having three coterminous edges
and 
- Statement
is true, statement
is true; statement
is a correct explanation for statement
- Statement
is true, statement
is true statement
is not a correct explanation for statement
- Statement
is true, statement
is false
- statement
is false, statement
is true
Assertion : For
the volume of the parallel piped formed by vectors
and
is maximum (The vectors form a right-handed system)
Reason: The volume of the parallel piped having three coterminous edges
and 
Maths-General
- Statement
is true, statement
is true; statement
is a correct explanation for statement
- Statement
is true, statement
is true statement
is not a correct explanation for statement
- Statement
is true, statement
is false
- statement
is false, statement
is true
Maths-
Assertion (A): Let
. If
such that
is collinear with
and
is perpendicular to
is possible, then
.
Reason (R): If
and
are non-zero, non-collinear vectors, then
can be expressed as
where
is collinear with
and
is perpendicular to 
- statement
is false, statement
is true
- Statement
is true, statement - 2 is true; statement
is a correct explanation for statement
- Statement
is true, statement
is true statement
is not a correct explanation for statement
- Statement - 1 is true, statement
is false
Assertion (A): Let
. If
such that
is collinear with
and
is perpendicular to
is possible, then
.
Reason (R): If
and
are non-zero, non-collinear vectors, then
can be expressed as
where
is collinear with
and
is perpendicular to 
Maths-General
- statement
is false, statement
is true
- Statement
is true, statement - 2 is true; statement
is a correct explanation for statement
- Statement
is true, statement
is true statement
is not a correct explanation for statement
- Statement - 1 is true, statement
is false
Maths-
Statement
If
are distinct non-negative numbers and the vectors â
and
are coplanar then
is arithmetic mean of
and
.
Statement -2: Parallel vectors have proportional direction ratios.
- Statement
is True, Statement
is True; Statement
is a correct explanation for Statement - 1
- Statement
is False, Statement
is True
- Statement
is True, Statement
is False
- Statement
is True, Statement
is True; Statement
is NOT a correct explanation for Statement - 1
Statement
If
are distinct non-negative numbers and the vectors â
and
are coplanar then
is arithmetic mean of
and
.
Statement -2: Parallel vectors have proportional direction ratios.
Maths-General
- Statement
is True, Statement
is True; Statement
is a correct explanation for Statement - 1
- Statement
is False, Statement
is True
- Statement
is True, Statement
is False
- Statement
is True, Statement
is True; Statement
is NOT a correct explanation for Statement - 1
Maths-
If
and
is a vector satisfying
.
Assertion
can be expressed in terms of
and
.
Reason 
- Statement
is true, statement - 2 is true statement - 2 is not a correct explanation for statement
- Statement - 1 is true, statement - 2 is false
- statement - 1 is false, statement - 2 is true
- Statement - 1 is true, statement - 2 is true; statement - 2 is a correct explanation for statement
If
and
is a vector satisfying
.
Assertion
can be expressed in terms of
and
.
Reason 
Maths-General
- Statement
is true, statement - 2 is true statement - 2 is not a correct explanation for statement
- Statement - 1 is true, statement - 2 is false
- statement - 1 is false, statement - 2 is true
- Statement - 1 is true, statement - 2 is true; statement - 2 is a correct explanation for statement
Maths-
If
are non-zero vectors such that
then
Assertion
: Least value of
is 
Reason (R): The expression
is least when magnitude of
is 
- statement - 1 is false, statement - 2 is true
- Statement
is true, statement - 2 is true statement - 2 is not a correct explanation for statement
- Statement - 1 is true, statement - 2 is false
- Statement - 1 is true, statement - 2 is true; statement - 2 is a correct explanation for statement
If
are non-zero vectors such that
then
Assertion
: Least value of
is 
Reason (R): The expression
is least when magnitude of
is 
Maths-General
- statement - 1 is false, statement - 2 is true
- Statement
is true, statement - 2 is true statement - 2 is not a correct explanation for statement
- Statement - 1 is true, statement - 2 is false
- Statement - 1 is true, statement - 2 is true; statement - 2 is a correct explanation for statement
Maths-
Statement- 1: If
and
and
, then there exist real numbers
,
such that

Statement- 2:
are four vectors in a 3 - dimensional space. If
are non-coplanar, then there exist real numbers
such that 
- Both
are true
is reason for
- Both
are false
- Both
are true & but
is not reason for
.
is true,
is false
Statement- 1: If
and
and
, then there exist real numbers
,
such that

Statement- 2:
are four vectors in a 3 - dimensional space. If
are non-coplanar, then there exist real numbers
such that 
Maths-General
- Both
are true
is reason for
- Both
are false
- Both
are true & but
is not reason for
.
is true,
is false
Maths-
Statement-
:If
are non-collinear points. Then every point
in the plane of
, can be expressed in the form 
Statement-
:The condition for coplanarity of four points
is that there exists scalars
not all zeros such that
where
.
- Both
are true
but
is not reason for
.
- Both
are true &
is reason for
.
- Both
are false
is true,
is false
Statement-
:If
are non-collinear points. Then every point
in the plane of
, can be expressed in the form 
Statement-
:The condition for coplanarity of four points
is that there exists scalars
not all zeros such that
where
.
Maths-General
- Both
are true
but
is not reason for
.
- Both
are true &
is reason for
.
- Both
are false
is true,
is false
Maths-
Assertion (A): The number of vectors of unit length and perpendicular to both the vectors.
and
is zero Reason
(R):
and
are two non-zero and non-parallel vectors it is true that
is perpendicular to the plane containing
and 
- statement - 1 is false, statement - 2 is true
- Statement
is true, statement
is true statement
is not a correct explanation for statement
- Statement
is true, statement - 2 is true; statement
is a correct explanation for statement
- Statement - 1 is true, statement - 2 is false
Assertion (A): The number of vectors of unit length and perpendicular to both the vectors.
and
is zero Reason
(R):
and
are two non-zero and non-parallel vectors it is true that
is perpendicular to the plane containing
and 
Maths-General
- statement - 1 is false, statement - 2 is true
- Statement
is true, statement
is true statement
is not a correct explanation for statement
- Statement
is true, statement - 2 is true; statement
is a correct explanation for statement
- Statement - 1 is true, statement - 2 is false
Maths-
The value of
for which the straight lines
and
are coplanar is
- -1
- 1
- 2
The value of
for which the straight lines
and
are coplanar is
Maths-General
- -1
- 1
- 2