Recent questions tagged 84

When an object is shot from the bottom of a long smooth inclined plane kept at an angle 60° with horizontal, it can travel a distance $x_1$ along the plane. But when the inclination is decreased to 30° and the same object the shot with the same velocity, it can travel $x-2$ distance. Then $x_1 : x_2$ will be

asked Jul 8, 2019 by pady_1

1 answer

Acetic acid reacts with $PCl_5$ to form :

asked Dec 19, 2018 by pady_1

0 answers

The pH of a 1 litre solution is 2. It is diluted with water till its pH becomes 4. How many litres of water are added ?

asked Dec 19, 2018 by pady_1

0 answers

I low many electrons are present in the $M$ shell of an atom of an element with atomic number 24 (Z = 24) ?

asked Dec 19, 2018 by pady_1

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What is X in the following reaction $_{12}Mg^{26} + _1H^2 \to _{12}Mg^{27}$ + X$ :

asked Dec 11, 2018 by pady_1

0 answers

Acetylene reacts with hypochlorous acid to form :

asked Dec 11, 2018 by pady_1

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The IUPAC name of $CH_3COCH(CH_3)_2$ is :

asked Dec 11, 2018 by pady_1

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The oxidation states of $Cr$ in $[Cr(H_2O)_6]Cl_3, [Cr(C_6H_6)_2]$, and $K_2[Cr(CN)_2(O)_2(O_2)(NH_3)]$ respectively are :

asked Dec 11, 2018 by pady_1

0 answers

The radius of the second Bohr orbit for hydrogen atom is : (Planck's constant $h= 6.6262 \times 10^{-34} Js$; mass of electron = $9.1091 \times 10^{-31} kg$; charge of electron $e = 1.60210 \times 10^{-19}C$; permittivity of vacuum $\in_0 = 8.854185 \times 10^{-12} kg^{-1}m^{-3}A^{2}$)

asked Dec 11, 2018 by pady_1

0 answers

If the line, $\frac{x-3}{2} = \frac{y+2}{-1} = \frac{z+4}{3}$ lies in the plane, $lx + my - z =9$, then $l^2 + m^2$ is equal to

asked Dec 11, 2018 by pady_1

1 answer

If the shortest distance between the lines $\frac{x-1}{\alpha} = \frac{y+1}{-1} = \frac{z}{1},\; (\alpha \neq -1)$ and $x+y+z+1=0=2x-y+z+3$ is $\frac{1}{\sqrt{3}}$, then a value of $\alpha$ is :

asked Dec 11, 2018 by pady_1

1 answer

The major organic compound formed by the reaction of 1, 1, 1-trichloroethane with silver powder is :

asked Dec 11, 2018 by pady_1

0 answers

If a piece of metal is heated to temperature $\theta$ and then allowed to cool in a room which is at temperature $\theta_0$ the graph between the temperature T of the metal and time t will be closest to :

asked Dec 11, 2018 by pady_1

0 answers

$K_f$ for water is $1.86 \;K\;mol^{-1}$. If your automobile radiator holds 1.0 kg of water, how many grams of ethylene glycol $(C_2H_6O_2)$ must you add to get the freezing point of the solution lowered to $-2.8^{\circ}C$ ?

asked Dec 11, 2018 by pady_1

0 answers

A gas absorbs a photon of 355 nm and emits at two wavelengths. If one of the emissions is at 680 nm, the other is at :

asked Dec 11, 2018 by pady_1

0 answers

Let $p(x)$ be a function defined on $R$ such that $p'(x) = p'(1-x)$, for all $x \in [0,1], \; p(0)=1$ and $p(1) =41$. Then $\begin{align} \int_0 ^1p(x) \; dx\end{align}$ equals

asked Dec 11, 2018 by pady_1

0 answers

Given $P(x) = x^4 + ax^3 + bx^2+cx+d$ such that $x=0$ is the only real root of $P'(x) = 0$. If $P(-1) < P(1)$, then in the interval $[-1, 1]$

asked Nov 29, 2018 by pady_1

0 answers

The speed of sound in oxygen $(O_2)$ at a certain temperature is $460 ms^{-1}$. The speed of sound in helium (He) at the same temperature will be (assumed both gases to be ideal)

asked Nov 29, 2018 by pady_1

0 answers

Consider the reaction, $2A + B \to products$ When concentration of B alone was doubled, the half-life did not change. When the concentration of A alone was doubled, the rate increased by two times. The unit of rate constant for this reaction is :

asked Nov 29, 2018 by pady_1

0 answers

What products are expected from the disproportion reaction of hypochlorous acid ?

asked Nov 13, 2018 by pady_1

0 answers

Hydrogen bomb is based on the principle of :

asked Nov 5, 2018 by pady_1

1 answer

The formulation of the oxide ion $O^{2-} (g)$ requires first an exothermic and then an endothermic step as shown below $O(g) + e^-O^-(g) \Delta H^{\circ} = -142 \; kJ\; mol^{-1}$ $O^-(g) + e^-O^{2-} (g) \Delta H^{\circ} = 844\;kJ\; mol^{-1}$

asked Nov 5, 2018 by pady_1

1 answer

The type of isomerism shown by the complex $[CoCl_2(en)_2]$ is

asked Aug 21, 2018 by pady_1

1 answer

Presence of plants arranged into well defined vertical layers depending on their height can be seen best in :

asked Aug 21, 2018 by pady_1

1 answer

Specialised epidermal cells surrounding the guard cells are called -

asked Aug 21, 2018 by pady_1

1 answer

The wheat grain has an embryo with one large, shield-shaped cotyledon known as -

asked Aug 21, 2018 by pady_1

1 answer

What products are formed when the following compound is treated with $Br_2$ in the presence of $FeBr_3$ ?

asked Aug 20, 2018 by pady_1

1 answer

$6.02 \times 10^{20}$ molecules of urea are present in $100\; mL$ of its solution. The concentration of solution is-

asked Aug 20, 2018 by pady_1

1 answer

Bond order of 1.5 is shown by:

asked Aug 20, 2018 by pady_1

0 answers

Of the following complex ions, which is diamagnetic in nature ?

asked Aug 16, 2018 by pady_1

1 answer

During the kinetic study of the reaction, $2A+B\to C+D$ following results were obtained: Based on the above data which one of the following is correct?

asked Jul 26, 2018 by pady_1

1 answer

The straight chain polymer is formed by –

asked Jul 26, 2018 by pady_1

1 answer

Kohlrausch's Law states that at :

asked Jul 26, 2018 by pady_1

1 answer

If $NaCl$ is doped with $10^{-4}$ mole % of $SrCl_2$, the concentrate of cation vacancies will be : $(N_A = 6.02 \times 10^{23}) mol^{-1}$

asked Jul 26, 2018 by pady_1

1 answer

A solution of acetone is ethanol:-

asked Jul 25, 2018 by pady_1

1 answer

Which one of the following compounds is most acidic :-

asked Jul 24, 2018 by pady_1

2 answers

The radioactive isotope $^{60}_{27}Co$which is used in the treatment of cancer can be made by (n, p) reaction. For this reaction the target nucleus is :-

asked Jul 24, 2018 by pady_1

1 answer

According to IUPAC nomenclature sodium nitroprusside is named as :

asked Jul 24, 2018 by pady_1

1 answer

Zn gives $H_2$ gas with $H_2SO_4$ & HCl but not with $HNO_3$ because :-

asked Jul 23, 2018 by pady_1

1 answer

Correct order of $I^{st}$ IP among following elements Be, B, C, N, O is : -

asked Jul 20, 2018 by pady_1

1 answer

Which of the following element exhibit maximum oxidation state :

asked Jul 20, 2018 by pady_1

1 answer

Schottky defect shows :

asked Jun 15, 2018 by pady_1

1 answer

Telephone : Cable : : Radio : ?

asked Dec 31, 2015 by pady_1

0 answers

what is the central value of 3, 7 and 8?

asked Dec 31, 2015 by pady_1

0 answers

A snail can move a distance of 0.39 meters in 3 hours. What distance can it travel in ten hours?

asked Dec 31, 2015 by pady_1

1 answer

Find Principal when Time = 3 years, Interest = \$ 600; Rate = $4\%$ p.a.

asked Dec 31, 2015 by pady_1

1 answer

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