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Questions asked by pady_1
Questions
15141
questions
0
answers selected
Assertion (A) : Biogas is produced from the dung of cows and buffaloes Reason (R) : Methanogens are present in the gut of ruminant animals and they are responsible for the production of methane from their dung. Regarding (A) and (R)
aipmt
ch2
easy
class11
biology
asked
Jan 3, 2014
1
answer
By R.H. Whittaker's Five Kingdom Classification Assertion (A) : Kingdom Protista has brought together Chlamydomonas, Chlorella (earlier placed in Algae within Plants and both having cell walls) with Paramoecium and Amoeba (which were earlier placed in the animal kingdom which lack cell wall). Reason (R) : It has put together organisms which, in earlier classifications, were placed in different kingdoms. Regarding (A) and (R)
aipmt
ch1
difficult
class11
biology
botany
asked
Jan 3, 2014
1
answer
Which of the following is more general in characters as compared to class
aipmt
ch1
easy
class11
biology
asked
Jan 3, 2014
1
answer
Which of the following is less general in characters as compared to genus
aipmt
ch1
easy
class11
biology
asked
Jan 3, 2014
1
answer
Assertion (A) : Monera and Protista both are of cellular in body organisation; Monera is Eukaryotic and Protista is Prokaryotic Reason (R) : Eukaryotic organisms have nuclear membrane and Prokaryotic organisms do not have nuclear membrane Regarding (A) and (R)
aipmt
ch1
medium
class11
biology
asked
Jan 3, 2014
1
answer
The taxonomic studies of various species of plants and animals are useful in:
aipmt
ch1
easy
class11
biology
asked
Jan 3, 2014
1
answer
Regarding Keys choose the incorrect one:
aipmt
ch1
difficult
class11
biology
botany
asked
Jan 3, 2014
1
answer
Regarding 1 and 2 <br> 1. The keys are based on the contrasting characters generally in a pair called compliment. <br> 2. Each statement in the key is called a cue.
aipmt
ch1
easy
class11
biology
asked
Jan 3, 2014
1
answer
Regarding 1 and 2 1. The keys are based on the contrasting characters generally in a pair called compliment. 2. Each statement in the key is called a lead.
aipmt
ch1
easy
class11
biology
asked
Jan 3, 2014
1
answer
Zoological Parks are the places:
aipmt
ch1
easy
class11
biology
asked
Jan 3, 2014
1
answer
Indian Botanical Garden and National Botanical Research Institute are located at
aipmt
ch1
easy
class11
biology
asked
Jan 3, 2014
1
answer
Regarding Assertion (A) and its Reason (R) :- <br> A: Fishes, amphibians, reptiles, birds are placed in Phylum Chordata but not mammals . <br> R: They are placed in a single phylum based on the common features like presence of notochord and dorsal hollow neural system
aipmt
ch1
medium
class11
biology
asked
Jan 3, 2014
1
answer
Identify the wrong statement:
aipmt
ch1
easy
class11
biology
asked
Jan 3, 2014
1
answer
Pick the Incorrect statement:
aipmt
ch1
difficult
class11
biology
botany
asked
Jan 3, 2014
1
answer
1. All categories together constitute the taxonomic category. 2. Each category represents a rank and is commonly termed as taxon
aipmt
ch1
medium
class11
biology
asked
Jan 3, 2014
1
answer
Regarding systematics which among the following is incorrect
aipmt
ch1
medium
class11
biology
asked
Jan 3, 2014
1
answer
Some universal rules of nomenclature are as follows: ( Identify the correct one)
aipmt
ch1
easy
class11
biology
asked
Jan 3, 2014
1
answer
Say True or False: 1. Properties of tissues are present in the constituent cells 2. Properties of cellular organelles are present in the molecular constituents of the organelle
aipmt
ch1
medium
class11
biology
asked
Jan 3, 2014
1
answer
ICN, The International Code of Nomenclature for algae, fungi, and plants (ICN) was formerly called ICBN. What does ICBN stand for?
aipmt
ch1
easy
class11
diversity in living world
biology
asked
Jan 3, 2014
1
answer
4. (1) The sum total of all chemical reactions occurring in our body is metabolism (2) Metabolic reactions cannot be demonstrated outside the body in cell free systems Regarding 1 and 2:
aipmt
ch1
difficult
class11
biology
asked
Jan 3, 2014
1
answer
3. Assertion (A): Growth & Reproduction are mutually exclusive events Reason (R): Growth is increase in body mass & Reproduction is production of progeny possessing features more or less similar to those of parents Regarding the statements A and R:
aipmt
ch1
difficult
class11
biology
asked
Jan 3, 2014
1
answer
1. Distinctive Characteristics exhibited by organisms are:
aipmt
ch1
medium
class11
biology
botany
asked
Jan 3, 2014
1
answer
Find area of the triangle with vertices at the point given in each of the following (-2, -3), (3, 2), (-1, -8)
cbse
class12
bookproblem
ch4
sec3
q1
p122
qp3
easy
sec-a
math
asked
Feb 23, 2013
1
answer
Find area of the triangle with vertices at the point given in each of the following (2, 7), (1, 1), (10, 8)
cbse
class12
bookproblem
ch4
sec3
q1
p122
qp2
easy
sec-a
math
asked
Feb 23, 2013
1
answer
Find equation of line joining (3, 1) and (9, 3) using determinants.
cbse
class12
bookproblem
ch4
sec3
q4
p123
qp2
easy
sec-a
math
asked
Feb 23, 2013
1
answer
Find values of $k$ if area of triangle is $4\; sq. units$ and vertices are $(-2, 0), (0, 4), (0, k)$
cbse
class12
bookproblem
ch4
sec3
q3
p123
qp2
easy
sec-a
math
asked
Feb 23, 2013
1
answer
Prove that $f: \text{R} \rightarrow \text{R}$ is a bijection given by $f(x) = x^3 + 3$. Find $f^{-1}(x)$. Does the truthfulness and honesty may have any relation?
cbse
class12
additionalproblem
valuebasedproblems2012
ch1
q1
math
sec-b
asked
Jan 24, 2013
0
answers
If $ A = \begin{bmatrix} 1 & 2 & -3 \\ 5 & 0 & 2 \\ 1 & -1 & 1 \end{bmatrix} , B = \begin{bmatrix} 3 & -1 & 2 \\ 4 & 2 & 5 \\ 2 & 0 & 3 \end{bmatrix} \text{ and } C = \begin{bmatrix} 4 & 1 & 2 \\ 0 & 3 & 2 \\ 1 & -3 & 2 \end{bmatrix} $, then compute $( A + B )$ and $( B - C )$. Also verify that $A + ( B - C ) = ( A + B ) - C. $
cbse
class12
bookproblem
ch3
sec2
q4
p81
easy
long-answer
sec-c
math
asked
Nov 26, 2012
1
answer
If $ A = \begin{bmatrix} \frac{2}{3} & 1 & \frac{5}{3} \\ \frac{1}{3} & \frac{2}{3} & \frac{4}{3} \\ \frac{7}{3} & 2 & \frac{2}{3} \end{bmatrix} \text{ and } B = \begin{bmatrix} \frac{2}{5} & \frac{3}{5} & 1 \\ \frac{1}{5} & \frac{2}{5} & \frac{4}{5} \\ \frac{7}{5} & \frac{6}{5} & \frac{2}{5} \end{bmatrix} \text{ then compute } 3A - 5B $
cbse
class12
bookproblem
ch3
sec2
q5
p81
medium
sec-b
math
asked
Nov 26, 2012
1
answer
Simplify $\cos\theta\begin{bmatrix} \cos\theta & \sin\theta \\ -\sin\theta & \cos\theta \end{bmatrix}$ + $\sin\theta\begin{bmatrix} \sin\theta & -\cos\theta \\ \cos\theta & \sin\theta \end{bmatrix} $
cbse
class12
bookproblem
ch3
sec2
q6
p81
easy
shortanswer
sec-a
math
asked
Nov 26, 2012
1
answer
Find $X$ and $Y$ if $$ \begin{array}{l \qquad l} (i) \quad X + Y = \begin{bmatrix} 7 & 0 \\ 2 & 5 \end{bmatrix} \text{ and } X - Y = \begin{bmatrix} 3 & 0 \\ 0 & 3 \end{bmatrix} \\ (ii) \quad 2X + 3Y = \begin{bmatrix} 2 & 3 \\ 4 & 0 \end{bmatrix} \text{ and } 3X + 2Y = \begin{bmatrix} 2 & -2 \\ -1 & 5 \end{bmatrix} \end{array} $$
cbse
class12
bookproblem
ch3
sec2
q7
p81
math
sec-a
asked
Nov 26, 2012
1
answer
Find $X$ , if $Y = \begin{bmatrix} 3 & 2 \\ 1 & 4 \end{bmatrix} $ and $ 2X + Y = \begin{bmatrix} 1 & 0 \\ -3 & 2 \end{bmatrix} $
cbse
class12
bookproblem
ch3
sec2
q8
p81
easy
shortanswer
sec-a
math
asked
Nov 26, 2012
1
answer
Find $x$ and $y$, if $ 2\begin{bmatrix} 1 & 3 \\ 0 & x \end{bmatrix} + \begin{bmatrix} y & 0 \\ 1 & 2 \end{bmatrix} = \begin{bmatrix} 5 & 6 \\ 1 & 8 \end{bmatrix} $
cbse
class12
bookproblem
ch3
sec2
q9
p81
easy
shortanswer
sec-a
math
asked
Nov 26, 2012
1
answer
Solve the equation for $x, y, z$ and $t$ if $ 2\begin{bmatrix}x & z \\ y & t \end{bmatrix} + 3\begin{bmatrix} 1 & -1 \\ 0 & 2 \end{bmatrix} = 3\begin{bmatrix} 3 & 5 \\ 4 & 6 \end{bmatrix} $
cbse
class12
bookproblem
ch3
sec2
q10
p81
easy
shortanswer
sec-a
math
asked
Nov 26, 2012
1
answer
If $ x\begin{bmatrix} 2 \\ 3 \end{bmatrix} + y\begin{bmatrix} -1 \\ 1 \end{bmatrix} = \begin{bmatrix} 10 \\ 5 \end{bmatrix} $, find the values of $x$ and $y$.
cbse
class12
bookproblem
ch3
sec2
q11
p81
easy
veryshort-answer
sec-a
math
asked
Nov 25, 2012
1
answer
Given $3\begin{bmatrix} x & y \\ z & w \end{bmatrix}$ = $\begin{bmatrix} x & 6 \\ -1 & 2w \end{bmatrix}$ + $\begin{bmatrix} 4 & x + y \\ z + w & 3 \end{bmatrix}$, find the values of $x, y, z$ and $w$.
cbse
class12
bookproblem
ch3
sec2
q12
p81
easy
shortanswer
sec-a
math
asked
Nov 25, 2012
1
answer
if $ F( x ) = \begin{bmatrix} cos\;x & -sin\;x & 0 \\ sin\;x & cos\;x & 0 \\ 0 & 0 & 1 \end{bmatrix}, $ show that $ F( x )\; F( y ) = F( x + y ). $
cbse
class12
bookproblem
ch3
sec2
q13
p82
easy
long-answer
sec-c
math
asked
Nov 25, 2012
1
answer
Show that $$ \begin{array}{l} (i) \qquad \begin{bmatrix} 5 & -1 \\ 6 & 7 \end{bmatrix} \begin{bmatrix} 2 & 1 \\ 3 & 4 \end{bmatrix} \: \neq \: \begin{bmatrix} 2 & 1 \\ 3 & 4 \end{bmatrix} \begin{bmatrix} 5 & -1 \\ 6 & 7 \end{bmatrix} \\[0.5em] (ii) \qquad \begin{bmatrix} 1 & 2 & 3 \\ 0 & 1 & 0 \\ 1 & 1 & 0 \end{bmatrix} \begin{bmatrix} -1 & 1 & 0 \\ 0 & -1 & 1 \\ 2 & 3 & 4 \end{bmatrix} \: \neq \: \begin{bmatrix} -1 & 1 & 0 \\ 0 & -1 & 1 \\ 2 & 3 & 4 \end{bmatrix} \begin{bmatrix} 1 & 2 & 3 \\ 0 & 1 & 0 \\ 1 & 1 & 0 \end{bmatrix} \end{array} $$
cbse
class12
bookproblem
ch3
sec2
q14
p82
sec-b
math
asked
Nov 25, 2012
1
answer
Find $ A^2 -5A + 6I $ , if $ A = \begin{bmatrix} 2 & 0 & 1 \\ 2 & 1 & 3 \\ 1 & -1 & 0 \end{bmatrix} $
cbse
class12
bookproblem
ch3
sec2
q15
p82
easy
shortanswer
sec-b
math
asked
Nov 25, 2012
1
answer
if $ A = \begin{bmatrix} 1 & 0 & 2 \\ 0 & 2 & 1 \\ 2 & 0 & 3 \end{bmatrix} ,$ prove that $ A^3 - 6A^2 + 7A + 2I = 0 $
cbse
class12
bookproblem
ch3
sec2
q16
p82
medium
long-answer
sec-c
math
asked
Nov 25, 2012
1
answer
If $ A = \begin{bmatrix} 3 & -2 \\ 4 & -2 \end{bmatrix} $ and $ I = \begin{bmatrix} 1 & 0 \\ 0 & 1 \end{bmatrix} $ find $k$ so that $A^2 = kA - 2I$
cbse
class12
bookproblem
ch3
sec2
q17
p82
easy
shortanswer
sec-b
math
asked
Nov 25, 2012
1
answer
If $ A = \begin{bmatrix} 0 & -tan \frac{\alpha}{2} \\ tan\frac{\alpha}{2} & 0 \end{bmatrix} $ and $I$ is the identity matrix of order $2$, show that $ I + A = ( I - A ) \begin{bmatrix} cos\alpha & -sin\alpha \\ sin\alpha & cos\alpha \end{bmatrix} $
cbse
class12
bookproblem
ch3
sec2
q18
p82
medium
sec-b
math
asked
Nov 25, 2012
1
answer
A trust fund has Rs 30,000 that must be invested in two different types of bonds. The first bond pays 5% interest per year, and the second bond pays 7% interest per year. Using matrix multiplication, determine how to divide Rs 30,000 among the two types of bonds. If the trust fund must obtain an annual total interest of: $$ \text{(a) Rs 1800} \qquad \qquad \text{(b) Rs 2000} $$
cbse
class12
bookproblem
ch3
sec2
q19
p82
easy
long-answer
math
sec-b
asked
Nov 25, 2012
1
answer
The bookshop of a particular school has 10 dozen chemistry books, 8 dozen physics books, 10 dozen economics books. Their selling prices are Rs 80, Rs 60 and Rs 40 each respectively. Find the total amount the bookshop will receive from selling all the books using matrix algebra.
cbse
class12
bookproblem
ch3
sec2
q20
p83
medium
long-answer
sec-b
math
asked
Nov 25, 2012
1
answer
Assume $X, Y, Z, W$ and $P$ are matrices of order $2\times n, 3\times k, 2\times p, n\times 3$ and $p\times k$, respectively. The restriction on $n, p, k$ so that $PY + WY$ will be defined are:
cbse
class12
bookproblem
ch3
sec2
q21
p83
sec-a
math
asked
Nov 25, 2012
1
answer
Assume $X, Y, Z, W$ and $P$ are matrices of order $2\times n$, $3\times k$, $2\times p$, $n\times 3$ and $p\times k$, respectively. If $n = p$ then the order of the matrix $7X - 5Z$ is:
cbse
class12
bookproblem
ch3
sec2
q22
p83
sec-a
math
asked
Nov 25, 2012
1
answer
Find the transpose of each of the following matrices : $$ \text{ (i) } \begin{bmatrix} 5 \\ \tfrac{1}{2} \\ -1 \end{bmatrix} \qquad \qquad (ii) \begin{bmatrix} 1 & -1 \\ 2 & 3 \end{bmatrix} \qquad \qquad (iii)\begin{bmatrix} -1 & 5 & 6 \\ \sqrt{3} & 5 & 6 \\ 2 & 3 & -1 \end{bmatrix} $$
cbse
class12
bookproblem
ch3
sec3
q1
p88
math
sec-a
asked
Nov 25, 2012
1
answer
if $ A = \begin{bmatrix} -1 & 2 & 3 \\ 5 & 7 & 9 \\ -2 & 1 & 1 \end{bmatrix} \text{ and } B = \begin{bmatrix} -4 & 1 & -5 \\ 1 & 2 & 0 \\ 1 & 3 & 1 \end{bmatrix} \text{, then verify that } $ $$ \text{ (i) } (A+B)' = A' + B' $$
cbse
class12
bookproblem
ch3
sec3
q2
p88
easy
sec-b
q2-1
math
asked
Nov 25, 2012
1
answer
If $ A' = \begin{bmatrix} 3 & 4 \\ -1 & 2 \\ 0 & 1 \end{bmatrix} \text{ and } B = \begin{bmatrix} -1 & 2 &1 \\ 1 & 2 & 3 \end{bmatrix} \text{ , then verify that } $$ \text{ (i) } (A + B )' = A' + B' \qquad \qquad $
cbse
class12
bookproblem
ch3
sec3
q3-1
p88
easy
shortanswer
sec-b
math
asked
Nov 25, 2012
1
answer
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