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अर्कज
Subject: Chemistry
, asked on 13/5/18
Solve this:
Answer
1
अर्कज
Subject: Chemistry
, asked on 13/5/18
Solve this:
Question No. 8
The water vapours present in the atmosphere form clouds by the process of
A. condensation
B. evaporation
C. freezing
D. Melting
Answer
1
अर्कज
Subject: Chemistry
, asked on 13/5/18
Solve this:
Question No. 10
The pressure of 1 mm Hg is equivalent to
A. 101.32 Pa
B. 133.32 Pa
C. 1.01 Pa
D. 1.33 Pa
Answer
1
Varun Gupta
Subject: Chemistry
, asked on 13/5/18
The vapour pressure of pure water and aqueous dilute soilution of ammonia are 25 mm Hg and 20 mm Hg respetively. Calculate the molality of the solution.
Answer
1
Romil Singh
Subject: Chemistry
, asked on 12/5/18
Solve this :
52. An empty vial weighs 55.32 g.
(a) If the vial weighs 185.56 g when filled with liquid mercury (d = 13.53 g/cm
^{3}
), what is its volume ?
(b) How much would the vial weigh if it were filled with water (d = 0.997 g/cm
^{3}
at 25
^{o}
C)
Answer
1
Vansh Jain
Subject: Chemistry
, asked on 12/5/18
Plz tell the answer of questions 9 &10
Answer
1
Souvik Das
Subject: Chemistry
, asked on 12/5/18
Calculate the amount of Cao ( in kg ) that can be produced by heating 200kg of limestone will 95% purity ?
Answer
3
Souvik Das
Subject: Chemistry
, asked on 12/5/18
Lithium weighing 20g reacts with 30g of oxygen to form lithium oxide . find the mass of oxide formed and the mass of the excess reactant left
Answer
3
Souvik Das
Subject: Chemistry
, asked on 12/5/18
What mass of CCl4 will be produced when 100g of carbon reacts with 100g of Cl2 . also ,find the mass excess of reagent ?
Answer
4
Souvik Das
Subject: Chemistry
, asked on 12/5/18
If H and O constitute 5.8 % and 94.11 % of a compound , respectively , whose molar mass is 34g mol^-1 , then what will be the molecular formula of the compound ?
Answer
2
Keta
Subject: Chemistry
, asked on 11/5/18
Pls solve
Q.20. The maximum volume at N.T.P. is occupied by-
(A) 12.8 gm of
$S{O}_{2}$
(B) 6.02
$\times $
${10}^{22}$
molecules of
$C{H}_{4}$
(C) 0.5 mol of
$N{O}_{2}$
(D) 1 gm-molecule of
$C{O}_{2}$
Answer
2
Prakhar
Subject: Chemistry
, asked on 11/5/18
Q.9) The length of a rod is measured as 83.5 cm. The relative error in the length of the rod is
A) 0.1 %
B) 0.2 %
C) 0.01 %
D) 0.02 %
Answer
1
Prakhar
Subject: Chemistry
, asked on 11/5/18
I have no idea how to derive the answer. Pls help and explain as I want to strengthen basics.
$\mathrm{Q}.\mathrm{The}\mathrm{equation}\mathrm{of}\mathrm{state}\mathrm{of}\mathrm{a}\mathrm{real}\mathrm{gas}\mathrm{is}\mathrm{given}\mathrm{by}\phantom{\rule{0ex}{0ex}}\left(\mathrm{P}+\frac{\mathrm{a}}{{\mathrm{V}}^{2}}\right)\left(\mathrm{V}-\mathrm{b}\right)=\mathrm{RT}\phantom{\rule{0ex}{0ex}}\mathrm{Where}\phantom{\rule{0ex}{0ex}}\mathrm{P}\to \mathrm{Pressure},\mathrm{V}\to \mathrm{Volume},\mathrm{T}\to \mathrm{Temperature},\mathrm{R}\to \mathrm{Universal}\mathrm{constant}\mathrm{then},\mathrm{dimension}\mathrm{of}\mathrm{constant}\text{'}\mathrm{a}\text{'}\mathrm{will}\mathrm{be}.\phantom{\rule{0ex}{0ex}}\left(\mathrm{A}\right)\left[\mathrm{M}{\mathrm{L}}^{7}{\mathrm{T}}^{-2}\right]\phantom{\rule{0ex}{0ex}}\left(\mathrm{B}\right)\left[\mathrm{M}{\mathrm{L}}^{-1}{\mathrm{T}}^{-2}\right]\phantom{\rule{0ex}{0ex}}\left(\mathrm{C}\right)\left[\mathrm{M}{\mathrm{L}}^{5}{\mathrm{T}}^{-2}\right]\phantom{\rule{0ex}{0ex}}\left(\mathrm{D}\right)\left[\mathrm{M}{\mathrm{L}}^{-5}{\mathrm{T}}^{-2}\right]$
Answer
1
Prakhar
Subject: Chemistry
, asked on 11/5/18
Q. The dimensions of
${\in}_{0}\frac{\partial {\varphi}_{E}}{\partial t},$
, where the symbols have their usual meanings, are
A)
$\left[{M}^{0}{L}^{0}{T}^{0}{A}^{1}\right]$
B)
$\left[{M}^{0}{L}^{2}{T}^{0}A\right]$
C)
$\left[{M}^{0}{L}^{2}{T}^{2}A\right]$
D)
$\left[{M}^{0}{L}^{1}{T}^{1}{A}^{0}\right]$
Answer
1
Prakhar
Subject: Chemistry
, asked on 9/5/18
How many oxygen atoms in 12g of c10h16o?
Answer
3
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What are you looking for?

Question No. 8

The water vapours present in the atmosphere form clouds by the process of

A. condensation

B. evaporation

C. freezing

D. Melting

Question No. 10

The pressure of 1 mm Hg is equivalent to

A. 101.32 Pa

B. 133.32 Pa

C. 1.01 Pa

D. 1.33 Pa

Solve this :52. An empty vial weighs 55.32 g.

(a) If the vial weighs 185.56 g when filled with liquid mercury (d = 13.53 g/cm

^{3}), what is its volume ?(b) How much would the vial weigh if it were filled with water (d = 0.997 g/cm

^{3}at 25^{o}C)Q.20. The maximum volume at N.T.P. is occupied by-

(A) 12.8 gm of $S{O}_{2}$

(B) 6.02 $\times $ ${10}^{22}$ molecules of $C{H}_{4}$

(C) 0.5 mol of $N{O}_{2}$

(D) 1 gm-molecule of $C{O}_{2}$

A) 0.1 %

B) 0.2 %

C) 0.01 %

D) 0.02 %

$\mathrm{Q}.\mathrm{The}\mathrm{equation}\mathrm{of}\mathrm{state}\mathrm{of}\mathrm{a}\mathrm{real}\mathrm{gas}\mathrm{is}\mathrm{given}\mathrm{by}\phantom{\rule{0ex}{0ex}}\left(\mathrm{P}+\frac{\mathrm{a}}{{\mathrm{V}}^{2}}\right)\left(\mathrm{V}-\mathrm{b}\right)=\mathrm{RT}\phantom{\rule{0ex}{0ex}}\mathrm{Where}\phantom{\rule{0ex}{0ex}}\mathrm{P}\to \mathrm{Pressure},\mathrm{V}\to \mathrm{Volume},\mathrm{T}\to \mathrm{Temperature},\mathrm{R}\to \mathrm{Universal}\mathrm{constant}\mathrm{then},\mathrm{dimension}\mathrm{of}\mathrm{constant}\text{'}\mathrm{a}\text{'}\mathrm{will}\mathrm{be}.\phantom{\rule{0ex}{0ex}}\left(\mathrm{A}\right)\left[\mathrm{M}{\mathrm{L}}^{7}{\mathrm{T}}^{-2}\right]\phantom{\rule{0ex}{0ex}}\left(\mathrm{B}\right)\left[\mathrm{M}{\mathrm{L}}^{-1}{\mathrm{T}}^{-2}\right]\phantom{\rule{0ex}{0ex}}\left(\mathrm{C}\right)\left[\mathrm{M}{\mathrm{L}}^{5}{\mathrm{T}}^{-2}\right]\phantom{\rule{0ex}{0ex}}\left(\mathrm{D}\right)\left[\mathrm{M}{\mathrm{L}}^{-5}{\mathrm{T}}^{-2}\right]$

A) $\left[{M}^{0}{L}^{0}{T}^{0}{A}^{1}\right]$

B) $\left[{M}^{0}{L}^{2}{T}^{0}A\right]$

C) $\left[{M}^{0}{L}^{2}{T}^{2}A\right]$

D) $\left[{M}^{0}{L}^{1}{T}^{1}{A}^{0}\right]$