List of practice Questions

Identify the reaction which is used to Jlbtain $\beta$-hydroxy ketone.

Which of the following is the correct order of priority of group in D-glyceraldehyde?

For a reaction between gaseous compounds, $\hspace20mm 2A + B \longrightarrow C + D$ the reaction rate = k[A][B]. If the volume of the container is made $\frac{1}{4}$ of the initial, then what will be the rate of reaction as compared to the initial rate?

The density of glycerol is higher than propanol due to

Which type of dyes are not used do dye nylon and polyester fibres?

Select the detergent that is used to prepare cosmetics.

The pair of straight lines $ {{x}^{2}}-3{{y}^{2}}=0 $ and the line $ x=1 $ form a triangle which is

Compound that has smell of bitter almonds is

Ethyl alcohol cannot be used as a solvent for methyl magnesium iodide because

A can filed with water is revolved in a vertical circle of radius 4 m and the water does not fall down. The time period for a revolution is about

The crystal structure can be studied by using

Two springs of spring constants $k_{1}$ and $k_{2}$ are joined in series and a mass $m$ is attached to them as shown in figure. The time-period of oscillations of the springs is

A body is projected horizontally with a velocity of $u$ $ m/s$ at an angle $ \beta $ with the horizontal. The kinetic energy at the highest point is $( \frac{ 3}{ 4} )^{th}$ of the initial kinetic energy. The value of $ \beta $ is

In a common emitter configuration, a transistor has $\beta = 50$ and input resistance $1\, k\Omega$. If the peak value of a.c. input is $0.01\, V$ then the peak value of collector current is

The function $f\left(x\right) = \sec \left[\log\left(x+\sqrt{1+x^{2}}\right)\right]$ is

The value of $\frac{\log_{3} 5 \times \log_{25} 27 \times \log_{49} 7}{\log_{81} 3}$ is

Which one of the following is employed as a tranquilizer drug ?

If $f(5)=7$ and $f^{'}(5)=7$ then $\displaystyle\lim _{x \rightarrow 5} \frac{x f(5)-5 f(x)}{x-5}$ is given by

When a manganous salt is fused with a mixture of $KNO_3$ and solid $NaOH$ the oxidation number of $Mn$ changes from $+2$ to

Which of the following orders regarding ionization energy is correct ?

A body weighs 22.42 g and has a measured volume of 4.7 cc The possible errors in the measurement of mass and volume are 0.01 g and cc. Then the maximum error percentage in the density will be

$n$ identical droplets are charged to $V$ volt each. If they coalesce to form a single drop, then its potential will be

The general solution of the different equation $100\frac{d^{2}y}{dx^{2}}-20 \frac{dy}{dx}+y = 0 $ is

The degree of the differential equation $x = 1+\left(\frac{dy}{dx}\right)+\frac{1}{2!}\left(\frac{dy}{dx}\right)^{2}+\frac{1}{3!}\left(\frac{dy}{dx}\right)^{3} + .........$

$\int\sqrt{1+\cos\,x}\,dx$ is equal to