Recent questions tagged 64

Which colour of the light has the longest wavelength ?

asked Jul 8, 2019 by pady_1

1 answer

Hg sticks to the surface of the glass when it comes in contact with :

asked Dec 19, 2018 by pady_1

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Which of the following is an oxide mineral ?

asked Dec 19, 2018 by pady_1

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The equilibrium constant for the reaction $H_{2(g)} + I_{2(g)} \leftrightharpoons 2HI_{(g)}$ is $64$ at a certain temperature. The equilibrium concentrations of $H_2$ and $HI$ are $2\;mol/L$ and $16\; mol/L$ respectively. What is the equilibrium concentrations (in $mol/L$) of $I_2$ ?

asked Dec 19, 2018 by pady_1

0 answers

The number of Ione pairs of electrons present on $Xe$ in $XeF_4$ is :

asked Dec 11, 2018 by pady_1

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If a charge $q$ is placed at the centre of the line joining two equal charges $Q$ such that the system is in equilibrium them the value of $q$ is :

asked Dec 11, 2018 by pady_1

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In the middle of the depletion layer of reverse biased p-n junction, the :

asked Dec 11, 2018 by pady_1

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The increasing order of basicity of the following compounds is :

asked Dec 11, 2018 by pady_1

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The most abundant elements by mass in the body of a healthy human adult are : Oxygen (61.4%); Carbon (22.9%), Hydrogen (10.0%) ; and Nitrogen (2.6%). The weight which a 75 kg person would gain if all $^1H$ atoms are replaced by $^2H$ atoms is :

asked Dec 11, 2018 by pady_1

0 answers

If $A= \begin{bmatrix} 5a & -b \\ 3 & 2 \end{bmatrix}$ and $A \; adj \; A = A A^T$, then $5a + b$ is equal to :

asked Dec 11, 2018 by pady_1

1 answer

The least value of the product $xyz$ for which the determinant $\begin{vmatrix} x& 1& 1 \\ 1 & y & 1 \\ 1 & 1 & z \end{vmatrix}$ is non negative, is:

asked Dec 11, 2018 by pady_1

1 answer

Resistance of $0.2\; M$ solution of an electrolyte is $50 \Omega$. The specific conductance of the solution is $1.4 \;S m^{-1}$ . The resistance of $0.5\; M$ solution of the same electrolyte is $280 \Omega$. The molar conductivity of $0.5\; M$ solution of the electrolyte in $S \;m^2 mol^{-1}$ is:

asked Dec 11, 2018 by pady_1

0 answers

A uniform cylinder of length L and mass M having cross-sectional area A is suspended, with its length vertical, from a fixed point by a massless spring, such that it is half submerged in a liquid of density $\sigma$ at equilibrium position. The extension $x_0$ of the spring when it is in equilibrium is: (Here k is spring constant)

asked Dec 11, 2018 by pady_1

0 answers

The molecule having smallest bond angle is :

asked Dec 11, 2018 by pady_1

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Sodium ethoxide has reacted with ethanoyl chloride. The compound that is produced in the above reaction is :

asked Dec 11, 2018 by pady_1

1 answer

The equation of the tangent to the curve $y = x + \frac{4}{x^2}$, that is parallel to the $x-axis$, is

asked Dec 11, 2018 by pady_1

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Let A and B denote the statements A : $\cos \alpha + \cos \beta + \cos \gamma = 0$ $B: \sin \alpha + \sin \beta + \sin \gamma = 0$ If $\cos (\beta-\gamma) + \cos(\gamma - \alpha) + \cos (\alpha - \beta) = -\frac{3}{2}$, then

asked Nov 29, 2018 by pady_1

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In context with the industrial preparation of hydrogen from water gas $(CO + H_2)$, which of the following is the correct statement?

asked Nov 29, 2018 by pady_1

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One end of a thermally insulated rod is kept at a temperature $T_1$ and the other at $T_2$. The rod is composed of two section of length $l_1$ and $l_2$ and thermal conductivities $K_1$ and $K_2$ respectively. The temperature at the interface of the two sections is

asked Nov 29, 2018 by pady_1

0 answers

Which of the following chemical reactions depicts the oxidizing behaviour of $H_2SO_4$ ?

asked Nov 13, 2018 by pady_1

0 answers

If $\overrightarrow{a}, \overrightarrow{b}, \overrightarrow{c} $ are non-coplanar vectors and $\lambda$ is a real number, then $[\lambda(\overrightarrow{a} + \overrightarrow{b}) \;\lambda^2 \overrightarrow{b} \;\lambda \overrightarrow{c} ] = [\overrightarrow{a} \overrightarrow{b} + \overrightarrow{c} \overrightarrow{b} ] $ for :

asked Nov 5, 2018 by pady_1

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If $I_0$ is the intensity of the principal maximum in the single slit diffraction pattern, then what will be its intensity when the slit width is doubled ?

asked Nov 5, 2018 by pady_1

0 answers

Let $\overline{a},\; \overline{b}$ and $\overline{c}$ be non-zero vectors such that $(\overline{a} \times \overline{b}) \times \overline{c} = \frac{1}{3} |\overline{b}| |\overline{c}| \overline{a}$. If $\theta$ is the acute angle between the vectors $\overline{b}$ and $\overline{c}$, then $\sin \theta$ equals

asked Nov 5, 2018 by pady_1

0 answers

Which of the following is correct with reapect to -I effect of the substituents ? (R = alkyl)

asked Aug 21, 2018 by pady_1

0 answers

Coconut fruit is

asked Aug 21, 2018 by pady_1

1 answer

Which of the following is not a characteristic feature during mitosis in somatic cells ?

asked Aug 21, 2018 by pady_1

1 answer

Which of the following biomolecules does have a phosphodiester bond?

asked Aug 21, 2018 by pady_1

1 answer

$Be^{2+}$ is isoelectronic with which of the following ions?

asked Aug 20, 2018 by pady_1

1 answer

The basic structural unit of silicates is -

asked Aug 20, 2018 by pady_1

1 answer

Maximum number of electrons in a subshell with l = 3 and n = 4 is :

asked Aug 20, 2018 by pady_1

2 answers

If the $E^o_{cell}$ for a given reaction has a negative value, then which of the following gives the correct relationships for the values of $\Delta {G^o}$ and $K_{eq}$ ?

asked Aug 16, 2018 by pady_1

1 answer

The correct order of increasing reactivity of Câ€“X bond towards nucleophile in the following compounds is:

asked Jul 26, 2018 by pady_1

0 answers

In the reaction $BrO{_3}{^-}(aq)+5Br^-(aq)+6H^+\rightarrow 3Br_2(l)+3H_2O(l)$ The rate of appearance of bromine ($Br_2$ ) is related to rate of disappearance of bromide ions as following

asked Jul 26, 2018 by pady_1

1 answer

How many stereoisomers does this molecule have $CH_3CH = CHCH_2 CHBrCH_3$

asked Jul 26, 2018 by pady_1

1 answer

The Langmuir adsorption isotherm is deduced using the assumption :

asked Jul 26, 2018 by pady_1

1 answer

The enthalpy and entropy change for the reaction: $Br_2(l)+Cl_2(g)\to 2BrCl(g)$ are$30KJ mol^{-1}$ and $105JK^{-1} mol^{-1}$ respectively. The temperature at which the reaction will be in equilibrium is:-

asked Jul 25, 2018 by pady_1

0 answers

The mass of carbon anode consumed (giving only carbondioxide) in the production of 270 kg of aluminium metal from bauxite by the Hall process is :- (Atomic mass : Al = 27)

asked Jul 24, 2018 by pady_1

1 answer

Which one of the following can be oxidised to the corresponding carbonyl compound :-

asked Jul 24, 2018 by pady_1

1 answer

The method of zone refining of metals is based on the principle of :

asked Jul 24, 2018 by pady_1

1 answer

$2A \rightarrow B+C$ It would be a zero order reaction when : -

asked Jul 23, 2018 by pady_1

1 answer

Which is correct statement :-

asked Jul 20, 2018 by pady_1

1 answer

Which one is responsible for produce energy in bio reaction :

asked Jul 20, 2018 by pady_1

1 answer

Aniline reacts with $Br_{2}$ water, $NaNO_{2}/HCl$ gives respectively :

asked Jun 15, 2018 by pady_1

0 answers

Bank is related to Money in the same way as Transport is related to

asked Dec 31, 2015 by pady_1

1 answer

Type the next number in this sequence: 5, 6, 8, 11, 15, 20, -----

asked Dec 31, 2015 by pady_1

1 answer

6 workers are assigned to paint the boundary of a a hospital. If 105.2 m of the boundary is already painted, and each worker can paint 6 m 400 mm of the boundary every hour, what is the total length of the boundary that would have been painted after an hour?

asked Dec 31, 2015 by pady_1

1 answer

The parking lot of the Mall has a capacity of 736 cars. On Saturdays the ratio of occupied spots to empty spots in the parking lot was 11:12. The number of additional cars that could park there is

asked Dec 31, 2015 by pady_1

0 answers

Bala got 60\% in his English test. If the test was of a total of 10 marks, then how many marks did he get?

asked Dec 31, 2015 by pady_1

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