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Answers posted by pady_1
Questions
4370
answers
1
best answer
0
votes
The relative lowering of vapour pressure is equal to:
answered
Nov 7, 2013
(a) ratio of the number of solute molecules to the total number of molecules in solution.
0
votes
Three faradays of electricity was passed through an aqueous solution of iron (II) bromide. The weight of iron metal (at. wt.= 56) deposited at the cathode is (in grams):
answered
Nov 7, 2013
(b) 84
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The rms velocity of an ideal gas at $27^{\circ}C$ is $0.3\;m/s$. Its rms velocity at $927^{\circ}C$(in m/s.) is :
answered
Nov 7, 2013
(d) 0.6
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The energy of the electron in the hydrogen atom is given by the expression:
answered
Nov 7, 2013
$(c)\;\large\frac{-2\pi^2 z^2e^4}{n^2h^2}$
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A gaseous mixture contains $56\;g$ of $N_2,44\;g $ of $\; CO_2$ and $16\; g$ of $CH_4$. The total pressure of the mixture is $720 \;mm$ Hg. The partial pressure of $CH_4$ is :
answered
Nov 7, 2013
(a) 180 mm
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Aniline is treated with $NaNO_2$ and $HCl$ at $0^{\circ} C$, the product formed is
answered
Nov 7, 2013
(c) benzene diazonium salt
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Which one of the following series of lines is found in the UV region of atomic spectrum of hydrogen?
answered
Nov 7, 2013
(d) Lyman
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A ratio isotope has a half life 10 days. If today there is 125 g of it left, what was its weight 40 days earlier?
answered
Nov 7, 2013
(d) 2000 g
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When $4p$ orbital in any atom is filled completely, the next electron goes in
answered
Nov 7, 2013
(a) 5s
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An organic compound has an empirical formula $CH_2O$. Its vapour density is 45. The molecular formula of compound is :
answered
Nov 7, 2013
$(d)\;C_3H_6O_3$
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Which of the gases contain the same number of molecules as that of $16\; g$ oxygen ?
answered
Nov 7, 2013
$(b)\;32\;g \;of\;SO_2$
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Find the integral $\Large \int \normalsize\bigg(\sqrt x-\frac{1}{\sqrt x}\bigg)^2\;dx$
answered
Nov 7, 2013
$\large \frac{x^2}{2}$$+\log x-2x+c.$
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The vector equation of the line $\Large \frac{x-5}{3}\;\frac{y-4}{7}\;\frac{z-6}{2}$ is _______________.
answered
Nov 7, 2013
$(B)\;(x-5) \hat i+(y+4) \hat j+(z-6) \hat k=\lambda(3 \hat i+7 \hat j+2 \hat k)$
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The temperature of the system decreases in the process of
answered
Nov 6, 2013
(b) abiabatic expansion
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Which one of the following parts is different from others with reference to ploidy number in Cycas?
answered
Nov 5, 2013
(2) Endosperm
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Potential energy function describing the interaction between two atoms of a diatomic molecule is $U(r)=a/r^{12} - b/r^6$.Force acting between them will be zero when the distance between the would be?
answered
Sep 2, 2013
Answer: The correct option is c $(a/b)^{\large\frac{1}{6}}$ If $F = 0$ ...
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votes
Can I put k=1,2,3 ?
answered
Jul 17, 2013
Yes, any value of k can be used.
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Find the value of a Given: Let A and B be the remainders when polynomials x3+2x2-5ax-7 and x3+ax2-12x+6 are divided by x+1 and x-2 respectively. If 2A+B=6 , find the value of a.
answered
Jun 12, 2013
Toolbox:Remainder Theorem : Let $p(x)$ be an polynomial of degree greater than or equal to one.Let '...
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Find area of the triangle with vertices at the point given in each of the following (-2, -3), (3, 2), (-1, -8)
answered
Feb 23, 2013
Toolbox: The area of a triangle whose vertices are $(x_1,y_1),(x_2,y_2),(x_3,y_3)$ is give...
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Find area of the triangle with vertices at the point given in each of the following (2, 7), (1, 1), (10, 8)
answered
Feb 23, 2013
Toolbox: The area of a triangle whose vertices are $(x_1,y_1),(x_2,y_2),(x_3,y_3)$ is give...
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