Recent questions tagged q6

"If Tom buys a red skateboard, then Amanda buys green in-line skates." Which statement below is logically equivalent?

asked Jan 18, 2014 by thanvigandhi_1

1 answer

Which of the following statements is true?

asked Jan 17, 2014 by thanvigandhi_1

1 answer

Estimate the wavelength of second line (also called as $\beta$-line) in Balmer series of hydrogen atom

asked Jan 9, 2014 by sreemathi.v

1 answer

If $ P(A)=0.65\: P(B)=0.80$ then $ P(A \cap B)$ lies in the interval

asked Jan 6, 2014 by thanvigandhi_1

1 answer

If on an average 2 ships in every 10, sinks. The probability that out of 5 ships expected to arrive, at least three will arrive safely is

asked Jan 3, 2014 by thanvigandhi_1

1 answer

An urn contains 10 blue and 6 red balls. 3 balls are drawn from the urn. The probability that at least two of the balls drawn will be red is :

asked Jan 2, 2014 by thanvigandhi_1

1 answer

In a series -9,-6,-3,----, find the number of terms n to get a sum $S_{n}$ = 66.

asked Dec 30, 2013 by yamini.v

1 answer

A line with positive direction cosines passes through the point $ P(2,-1,2)$ and makes equal angle with coordinate axes. The line meets the plane $2x+y+z=9$ at the point $Q$. The length of the segment $PQ$=?

asked Dec 23, 2013 by rvidyagovindarajan_1

1 answer

If $f(9)=9,f'(9)=4$ then $\lim\limits_{x\to 9}\large\frac{\sqrt{f(x)}-3}{\sqrt x-3}$ equals

asked Dec 20, 2013 by sreemathi.v

1 answer

A particle of mass $m$ is projected with velocity $v$ making an angel of $45^{\circ}$ with the horizontal. When the particle lands on the level ground the magnitude of the change in its momentum will be :

asked Dec 14, 2013 by thanvigandhi_1

0 answers

Integrate :$\int \limits_3^4 \large\frac{1}{\sqrt {(x-3)(4-x)}} $$dx$

asked Dec 12, 2013 by meena.p

1 answer

Calculate $\wedge^{\large\circ}_m$ for KCl solution if molar ionic conductances at infinite dilution are $7.352\times 10^{-3}Sm^2mol^{-1}$ for $K^+$ and $7.634\times 10^{-3}Sm^2mol^{-1}$ for $Cl^{-}$.The $\wedge^{\large\circ}_m$ is

asked Dec 10, 2013 by sreemathi.v

1 answer

Which of the following is the correct order of C-C bond length?

asked Dec 9, 2013 by sreemathi.v

1 answer

Protoplast lacks :

asked Dec 6, 2013 by thanvigandhi_1

1 answer

Which of the following represent the correct order of decrease in covalent character?

asked Dec 6, 2013 by sreemathi.v

1 answer

Refer to the below reaction :

asked Dec 4, 2013 by sreemathi.v

1 answer

1-Methyl cyclopentene can be

asked Dec 2, 2013 by sreemathi.v

1 answer

Reverse transcriptase enzymes are employed to

asked Dec 1, 2013 by thanvigandhi_1

0 answers

What acts as a catalyst in cyanamids process

asked Nov 26, 2013 by sreemathi.v

1 answer

A skew-symmetric matrix S satisfies the relation $S^2+I=0$ where $I$ is a unit matrix. Then $SS'$ is equal to

asked Nov 25, 2013 by sreemathi.v

1 answer

In the life cycle of Rhizopus the unicellular structure with diploid nuclei is :

asked Nov 24, 2013 by thanvigandhi_1

1 answer

Inflorescence in Jatropha is a

asked Nov 22, 2013 by thanvigandhi_1

0 answers

The system of equations $\alpha x+y+z=\alpha-1$, $x+\alpha y+z=\alpha-1$, $x+y+\alpha z=\alpha-1$ has infinite solutions if $\alpha$ is

asked Nov 22, 2013 by sreemathi.v

1 answer

Which of the following expression acquires constant value at equilibrium for the process shown below?

asked Nov 13, 2013 by mosymeow_1

1 answer

Two particles of equal mass have velocities $\overrightarrow {v_1}=4 \hat i$ and $\overrightarrow{v_2} =4 \hat j ms^{-1}$. First particle has an acceleration $\overrightarrow{a_1}=(5 \hat i+5 \hat j)ms^{-2}$ while the accleration of the other particle is zero. The center of mass of the two particles moves in a path of :

asked Nov 13, 2013 by meena.p

1 answer

$\{ n(n+1)(2n+1): n \in Z \} \in $

asked Nov 11, 2013 by meena.p

1 answer

Fruits which break at maturity into number of pieces equal to the number of carpels are found in :

asked Nov 10, 2013 by thanvigandhi_1

1 answer

Identify A and B in the following reactions:

asked Nov 8, 2013 by meena.p

0 answers

The center of mass of three particles of masses 1 kg,2 kg and 3 kg is at (2,2,2). The position of the fourth mass of 4 kg to be placed in the system as that the new center of mass is at (0,0,0) is :

asked Nov 7, 2013 by meena.p

2 answers

A mixture in which the mole ratio of $H_2$ and $O_2$ is 2 : 1 is used to prepare water by the reaction $2H_2(g)+O_2(g)\rightarrow 2H_2O(g)$.The total pressure in the container is 0.8atm at $20^{\large\circ}C$ before the reaction.Determine the final pressure at $120^{\large\circ}C$ after reaction assuming 80% yield of water.

asked Nov 6, 2013 by sreemathi.v

1 answer

For all integers $ n \leq 1$, which of the following is divisible by 9?

asked Nov 5, 2013 by meena.p

1 answer

Which of the following reactions an produce aniline as main product?

asked Oct 29, 2013 by meena.p

1 answer

If $ABCD$ is a Rhombus, with position vectors of vertices,$\overrightarrow {OA},\:\overrightarrow {OB},\:\overrightarrow {OC}\:and\:\overrightarrow {OD}$, then $\overrightarrow {OA}+\overrightarrow {OB}+\overrightarrow {OC}+\overrightarrow {OD}=?$

asked Oct 29, 2013 by rvidyagovindarajan_1

1 answer

A man of 50kg is standing at one end on a boat of length 25 m and mass $200\;kg$. If he starts running and when he reaches the other end, he has a velocity $2\;ms^{-1}$ with respect to boat The final velocity of the boat is : (in $ms^{-1}$)

asked Oct 28, 2013 by meena.p

1 answer

Study the following combinations and identify the correct matches related to the role of essential mineral elements in plants :

asked Oct 25, 2013 by thanvigandhi_1

1 answer

If $S_n= 1^3+2^3+......+n^3$ and $T_n=1+2......+n$, then

asked Oct 24, 2013 by meena.p

1 answer

Calculate enthalpy for formation of ethylene from the following data

asked Oct 23, 2013 by meena.p

1 answer

From 200mg of $CO_2,10^{21}$ molecules are removed.How many moles of $CO_2$ are left?

asked Oct 22, 2013 by sreemathi.v

1 answer

Two bodies of 6 kg and 4 kg masses have their velocity $5 \hat i+ 2 \hat j +10 \hat k$ and $10 \hat i - 2 \hat j -8 \hat k$ respectively. Then the velocity of their center of mass is

asked Oct 22, 2013 by meena.p

1 answer

It is found that 16.5g of metal combine with oxygen to form 35.6g of metal oxide.Calculate the percentage of metal and oxygen in the compound.

asked Oct 22, 2013 by sreemathi.v

1 answer

In a $\Delta PQR$ if $3\sin P+4\cos Q=6.4\sin Q+3\cos P=1$ then the angle $R$ is equal to

asked Oct 17, 2013 by sreemathi.v

1 answer

For any integer $ n \leq 1$, the sum $\sum \limits _{k=1}^n$. $ k(k+2)$ is equal to

asked Oct 16, 2013 by meena.p

1 answer

Study the following lists

asked Oct 15, 2013 by thanvigandhi_1

1 answer

If $\alpha+\beta=\large\frac{\pi}{2}$ and $\beta+\gamma=\alpha$ then $\tan \alpha$ equals

asked Oct 14, 2013 by sreemathi.v

1 answer

A binary sequence is an array of 0's and 1's. The number of n-digit binary sequences which contain even number of 0's is :

asked Oct 8, 2013 by meena.p

1 answer

A binary sequence is an array of $0's $ and $1's$. The number of n-digit binary sequences which contain even number of $0's$ is:

asked Oct 8, 2013 by meena.p

1 answer

The value of $\large\frac{\cos\theta}{1+\sin\theta}$ is equal to

asked Oct 4, 2013 by sreemathi.v

1 answer

A steel wire of $40\;m$ in length is stretched through $2.0\; mm.$ The cross sectional area of the wire is $2.0 \;mm^2$ . If young's modulus of steel is $2.0 \times 10^{11}\;N/m^2$ the energy density of wire is

asked Oct 2, 2013 by meena.p

1 answer

Collocytes which provide mechanical strength in the plants are present in

asked Oct 1, 2013 by thanvigandhi_1

1 answer

A polygon has 54 diagonals. Then the number of its sides is :

asked Sep 26, 2013 by meena.p

2 answers

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