Recent questions tagged 53

A mass m is attached to a thin wire and whirled in a vertical circle. The wire is most likely to break when:

asked Jul 8, 2019 by pady_1

1 answer

10.6 g of a substance of molecular weight 106 was dissolved in 100 mL. 10 mL of this solution was pipetted out into a 1000 mL flask and made up to the mark with distilled water. The molarity of the resulting solution is :

asked Dec 20, 2018 by pady_1

0 answers

In which of the following reactions ozone acts as a reducting agent ?

asked Dec 19, 2018 by pady_1

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The total pressure of a mixture of 6.4 of $O_2$ and 5.6 g of $N_2$ present in a 2 litre vessel is $1200\;mm$. What is the partial pressure (in mm) of nitrogen ?

asked Dec 19, 2018 by pady_1

0 answers

......... process is used for the removal of hardness of water :

asked Dec 11, 2018 by pady_1

1 answer

The mass of a product liberated on anode in an electrochemical cell depends on :

asked Dec 11, 2018 by pady_1

0 answers

The co-ordinates of a moving particle at any time $t$ are given by $x = \alpha t^3$ and $y = \beta t^3$. The speed of the particle at time $t$ is given by :

asked Dec 11, 2018 by pady_1

0 answers

Let $S = \{ t \in R : f(x) = |x-\pi|. (e^{|x|} - 1) \sin |x|$ is not differentiable at $t\}$. Then the set $S$ is equal to :

asked Dec 11, 2018 by pady_1

1 answer

A particle is executing simple harmonic motion with a time period T. At time = 0, it is at its position of equilibrium. The kinetic energy-time graph of the particle will look like :

asked Dec 11, 2018 by pady_1

0 answers

The absolute configuration of is :

asked Dec 11, 2018 by pady_1

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A is :

asked Dec 11, 2018 by pady_1

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$\displaystyle{\lim_{x \to 0} \frac{\sin( \pi \cos^2 x)} {x^2}}$ is equal to

asked Dec 11, 2018 by pady_1

1 answer

If the lines $\frac{x-2}{1} = \frac{y-3}{1} = \frac{z-4}{-k}$ and $\frac{x-1}{k} = \frac{y-4}{2} = \frac{z-5}{1}$ are coplanar, then $k$ can have

asked Dec 11, 2018 by pady_1

1 answer

This question has statement 1 and statement 2. Of the four choices given after the statements, choose the one that best describes the two statements If two springs $S_1$ and $S_2$ of force constants $k_1$ and $k_2$, respectively, are stretched by the same force, it is found that more work is done on spring $S_1$ than on spring $S_2$. If stretched by the same amount, work done on $S_1$, will be more than that on $S_2$. Statement 2 : $k_1 < k_2$.

asked Dec 11, 2018 by pady_1

0 answers

The shortest distance between line $ y-x=1$ and curve $x=y^2$ is

asked Dec 11, 2018 by pady_1

0 answers

A point P moves in counter-clockwise direction on a circular path as shown in the figure. The movement of $'P'$ is such that it sweeps out a length $s = t^3 +5$, where $s$ is metres and $t$ is in seconds. The radius of the path is $20 \;m$. The acceleration of $'P'$ when $t = 2\;s$ is nearly

asked Dec 11, 2018 by pady_1

0 answers

The number of stereoisomers possible for a compound of the molecular formula $CH_3 - CH = CH - CH(OH)-Me$ is :

asked Nov 29, 2018 by pady_1

0 answers

$\alpha$-D-(+)-glucose and $\beta$-D-(+)-glucose are

asked Nov 29, 2018 by pady_1

0 answers

For the given uniform square lamina ABCD, whose centre is O :

asked Nov 29, 2018 by pady_1

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If the lattice constant of this semiconductor is decreased, then which of the following is correct ?

asked Nov 13, 2018 by pady_1

0 answers

The locus of a point $P(\alpha, \beta)$ moving under the condition that the line $y = \alpha x+ \beta$ is a tangent to the hyperbola $\frac{x^2}{a^2} - \frac{y^2}{b^2} = 1$ is :

asked Nov 5, 2018 by pady_1

0 answers

A heater coil is cut into two equal parts and only one part is now used in the heater. The heat generated will now be :

asked Nov 5, 2018 by pady_1

0 answers

If $a \neq 0$ and the line $2bx+3cy+4d=0$ passes through the points of intersection of the parabolas $y^2=4ax$ and $x^2=4ay$, then

asked Nov 5, 2018 by pady_1

0 answers

The compound $C_7H_8$ undergoes the following reactions: $C_7H_8 \xrightarrow{3Cl_2/ \Delta} A \xrightarrow{Br_2/Fe} B \xrightarrow{Zn/ HCl} C$ The product 'C' is

asked Aug 21, 2018 by pady_1

1 answer

The association of histone H1 with a nucleosome indicates :

asked Aug 21, 2018 by pady_1

1 answer

In a testcross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-typeoffspring. This indicates -

asked Aug 21, 2018 by pady_1

1 answer

Axile placentation is present in -

asked Aug 21, 2018 by pady_1

1 answer

When 22.4 litres of $H_2(g) $ is mixed with 11.2 litres of $Cl_2 (g)$, each at STP, the moles of $HCl(g) $ formed is equal to -

asked Aug 20, 2018 by pady_1

1 answer

A button cell used in watches functions as following $Zn(s) + Ag_2O(s) + H_2O (l) \rightleftharpoons 2Ag(s) + Zn^{2+} (aq) + 2OH^- (aq)$ If half cell potentials are $Zn^{2+} (aq) + 2e^- \to Zn (s) ; \; \; \; E^o = -0.76V $ $ Ag_2O(s) + H_2O (l) + 2e^- \to 2Ag(s) + 2OH^- (aq),\; \; \; E^o = 0.34 V $ The cell potential will be -

asked Aug 20, 2018 by pady_1

1 answer

In which of the following reactions, standard reaction entropy change $(\Delta S°)$ is positive and standard gibb's energy change $(\Delta G°)$ decreases sharply with increasing temperature ?

asked Aug 20, 2018 by pady_1

1 answer

Mole fraction of the solute in a 1.00 molal aqueous solution is :

asked Aug 16, 2018 by pady_1

1 answer

In which of the following pairs of molecules/ ions, the central atoms have $sp^2$ hybridization?

asked Jul 26, 2018 by pady_1

1 answer

Maximum number of electrons in a subshell or an atom is determined by the following :

asked Jul 26, 2018 by pady_1

1 answer

The dissociation equilibrium of a gas $AB_2$ can be represented as : $2AB_2 (g)\rightleftharpoons 2AB(g) + B_2 (g)$ The degree of dissociation is 'x' and is small s compared to 1. The expression relating the degree of dissociation (x) with equilibrium constant $K_p$ and total pressure P is -

asked Jul 26, 2018 by pady_1

0 answers

Concentrated aqueous sulphuric acid is $98\% H_2SO_4$ by mass and has a density of $1.80 g.mL^{-1} $ Volume of acid required to make 1 litre of $0.1 MH_2SO_4$ solution is :

asked Jul 26, 2018 by pady_1

1 answer

A plot of log x/m versus log p for the adsorption of a gas on a solid gives a straight line with slope equal to:

asked Jul 25, 2018 by pady_1

0 answers

The best method for the separation of naphthalene and benzoic acid from their mixture is -

asked Jul 24, 2018 by pady_1

1 answer

Which of the following does not have a metal- carbon bond :-

asked Jul 24, 2018 by pady_1

1 answer

The value of Planck's constant is $6.63 \times 10^{–34}Js$. The velocity of light is $3.0 \times 10^8 ms^{–1}$. Which value is closest to the wavelength in nanometers of a quantum of light with frequency of $8 \times 10^{15} s^{–1}$ :

asked Jul 24, 2018 by pady_1

2 answers

Reaction $BaO_2 (s) \rightleftharpoons BaO (s) + O_2(g)$; $\bigtriangleup H = + ve$. In equilibrium condition. Pressure of $O_2$ is depends on : -

asked Jul 23, 2018 by pady_1

1 answer

Which alkene on ozonolysis gives

asked Jul 20, 2018 by pady_1

1 answer

Polarization in acrolein as :

asked Jul 20, 2018 by pady_1

1 answer

IUPAC name of

asked Jun 15, 2018 by pady_1

1 answer

Round each number to nearest hundreds and find the product. 474 $\times$ 164

asked Dec 31, 2015 by pady_1

1 answer

If a data is represented in a circle then this type of representation is called as

asked Dec 31, 2015 by pady_1

0 answers

Each side of a square market is 5 metres long. What is the market's area?

asked Dec 31, 2015 by pady_1

0 answers

The parking lot of the Mall has a capacity of 1092 cars. On Wednesdays the ratio of occupied spots to empty spots in the parking lot was 9:19. The number of additional cars that could park there is

asked Dec 31, 2015 by pady_1

0 answers

Alice is 2 years older than Bobby who is twice as old as Carol. If the total of the ages of Alice, Bobby and Carol is 27 years, how old is Bobby?

asked Dec 31, 2015 by pady_1

0 answers

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