Recent questions tagged jeemain

$f(x)=\begin {vmatrix} 2 \cos x & 1 & 0 \\ x-\frac{\pi}{2} & 2 \cos x & 1 \\ 0 & 1 & 2 \cos x \end {vmatrix}=>f'(\pi)=$

asked Sep 26, 2013 by meena.p

1 answer

Let $\alpha \neq 1$ be a real root of the equation $x^3-ax^2+ax-1=0,$ where $a \neq -1 $ is a real number. Then a root of this equation, among the following, is :

asked Sep 26, 2013 by meena.p

1 answer

The condition that the roots of $x^3-bx^2+cx-d=0$ are in geometric progression is :

asked Sep 26, 2013 by meena.p

1 answer

$\bigg \{ x \in R: \large\frac{14 x}{x+1}-\frac{9x-30}{x-4} $$<0 \bigg\}=$

asked Sep 26, 2013 by meena.p

1 answer

For $x \in R$, the least value of $\large\frac{x^2-6x+5}{x^2+2x+1}$ is :

asked Sep 26, 2013 by meena.p

1 answer

$\log _4 2-\log _g 2+\log _{16} 2-...............=$

asked Sep 26, 2013 by meena.p

1 answer

$ \large \frac{3x^2+x+1}{(x-1)^4}=\frac{a}{(x+1)}+\frac{b}{(x-1)^2}+\frac{c}{(x-1)^3}+\frac{d}{(x-1)^4} $$ => \begin{bmatrix} a & b \\ c & d \end{bmatrix} $=

asked Sep 26, 2013 by meena.p

1 answer

For $| x | < \large\frac{1}{5}$, the coefficient of $x^3$ in the expansion of $\large\frac{1}{(1-5x)(1-4x)}$ is :

asked Sep 26, 2013 by meena.p

1 answer

$(1+2x+3x^2)^{10}=a_0+a_1x+a_2x^2+..........+a_{20}x^{20}=>\large\frac{a_2}{a_1}$=

asked Sep 26, 2013 by meena.p

1 answer

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

asked Sep 26, 2013 by meena.p

2 answers

Let $a_n=\large\frac{10^n}{n !}$ for $n=1,2,3.......$ Then the greatest value of $n$ for which $a_n$ is the greatest is :

asked Sep 26, 2013 by meena.p

1 answer

Let $n= 1 !+ 4 !+7 !+.............+400 !$. Then ten's digits of $n$ is :

asked Sep 26, 2013 by meena.p

1 answer

The numbers $a_n=6^n-5n$ for $n=1,2,3,.....$ when divided by 25 leave the remainder:

asked Sep 26, 2013 by meena.p

1 answer

Let R denotes the set of all real numbers and $R^{+}$ denote the set of all positive real numbers. For the subsets $A$ and $B$ of R define $f:A \to B$ by $f(x)=x^2$ for $x \in A$. Observe the two lists given below:

asked Sep 26, 2013 by meena.p

1 answer

If $f(0),f(1)=1,f(2)=2$ and $f(x)=f(x-2)+f(x-3)$ for $x=3,4,5,........$ then $f(9)=$

asked Sep 26, 2013 by meena.p

1 answer

With the reference to the diagram given, the van der walls redius is equal to :

asked Sep 26, 2013 by meena.p

1 answer

In the Born-Haber cycle of the given reaction $Na(s)$$ +\large \frac{1}{2}$$ Cl_2 \to NaCl(s)$ the number of endothermic and exothermic stages respectively are:

asked Sep 26, 2013 by meena.p

1 answer

In which one of the following, the bond angle is the lowest?

asked Sep 26, 2013 by meena.p

1 answer

If the uncertainty in velocities of two particles A and B with mass $1.0 \times 10^{-27}\;kg$ and $1.0 \times 10^{-31}\;kg$ respectively is the same , the ratio of uncertainty in the positions of A and B is :

asked Sep 25, 2013 by meena.p

1 answer

The number of radial nodes present in the radial probability distribution curves for the orbital wave function with quantum numbers $n=4,l=0$ and $m=0$ is:

asked Sep 25, 2013 by meena.p

1 answer

Which one of the following is a food preservative?

asked Sep 25, 2013 by meena.p

1 answer

Scurvy is caused by the deficiency of which vitamin?

asked Sep 25, 2013 by meena.p

1 answer

Proteins are:

asked Sep 25, 2013 by meena.p

1 answer

Carbylamine test is used to detect which one of the following?

asked Sep 25, 2013 by meena.p

0 answers

Identify X in the following :

asked Sep 25, 2013 by meena.p

1 answer

Which component is formed when a mixture of calcium acetate and calcium formate is heated?

asked Sep 25, 2013 by meena.p

1 answer

Assertion (A): Ethanol boils at lower temperature than ethane. Reason (R): The molecular weight of ethanol is higher than that of ethane.

asked Sep 25, 2013 by meena.p

1 answer

Refer the below equation:

asked Sep 25, 2013 by meena.p

1 answer

The number of stereo isomers possible for $H_3C-CH(OH)-CH(OH)-CH_3$ is :

asked Sep 25, 2013 by meena.p

1 answer

Which one of the following does not give precipitate with ammonical cuprous chloride?

asked Sep 25, 2013 by meena.p

1 answer

Which one of the following alkenes gives only ethanal on ozonolysis?

asked Sep 25, 2013 by meena.p

1 answer

The reagent used to detect phosphorous in an organic compound is :

asked Sep 25, 2013 by meena.p

1 answer

Which one of the following is not a green - house gas?

asked Sep 25, 2013 by meena.p

1 answer

Which of the following metallurgical processes does not involve heating?

asked Sep 25, 2013 by meena.p

1 answer

The solution of $X$ having excess of caustic potash is used to detect ammonia. Which of the following is $X$?

asked Sep 25, 2013 by meena.p

1 answer

A mixture of $He,Ne,Kr$ and $Xe$ is cooled. Which one of them condenses first?

asked Sep 25, 2013 by meena.p

1 answer

Bond energy of $F_2,Cl_2$ and $Br_2$ follow the order:

asked Sep 25, 2013 by meena.p

1 answer

Electronegativity of group 13 elements follow the order:

asked Sep 25, 2013 by meena.p

1 answer

Which of the following statement are correct?

asked Sep 25, 2013 by meena.p

1 answer

The gases evolved in the decomposition of lead nitrate are:

asked Sep 25, 2013 by meena.p

1 answer

What is the empirical formula of sheet silicates ?

asked Sep 25, 2013 by meena.p

1 answer

The relative of $Ca,Sr,Mg$ and $Ba$ with water follow the order:

asked Sep 25, 2013 by meena.p

1 answer

Calcium carbide is hydrolyzed using heavy water. What are the products formed?

asked Sep 25, 2013 by meena.p

1 answer

According to Langmuir adsorption isotherm, the amount of gas absorbed by unit surface area is : (a,b,,k and n are constants; P=pressure of gas)

asked Sep 25, 2013 by meena.p

1 answer

Which one of the following pairs represents the intensive properties ?

asked Sep 25, 2013 by meena.p

1 answer

The order of $pH$ of $0.200\;M$ solutions of $NH_4NO_3,Na_2CO_3$ is:

asked Sep 25, 2013 by meena.p

1 answer

At $T(k),$ the partial pressures of $SO_2,O_2$ and $SO_3$ are $0.662,0.100$ and $0.331$ atm. respectively for the reaction $ 2 S0_2+O_2 \to 2 SO_3$ at equilibrium . What is the partial pressure in atm. of $O_2$ when the equilibrium partial pressures of $SO_2$ and $SO_3$ are equal at the same temperature?

asked Sep 25, 2013 by meena.p

1 answer

Match the following:

asked Sep 25, 2013 by meena.p

1 answer

In electro chemical corrosion, the metal undergoing corrosion :

asked Sep 25, 2013 by meena.p

1 answer

If the length of the unit cell is 5 A, the smallest distance in A between the two neighboring metal atoms in a face center cubic lattice is :

asked Sep 25, 2013 by meena.p

1 answer

Ask Questions, Get Answers