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Chemistry

Mole Concept Redox

Solution for Class 11, Chemistry, Mole Concept Redox

Question 1

O) Calculate the mole fraction of benzene in solution containing

30%

by mass in carbon tetrachloride.

Topic:

Mole Concept & Redox

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Question 2

A welding fuel gas contains carbon and hydrogen only. Burning a small sample of it in oxygen gives

3.38 g

carbon dioxide

.690 g

of water and no other products. A volume of

10.0 L

of this welding gas is found to weigh

11.6 g

the empirical \& molecular formula will be.

(म) $CH, C_{2} H_{2}$
(2) $CH, CH$
(3) $CH, C_{3} H_{8}$
(4) None of these

Topic:

Mole Concept & Redox

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Question 3

85. Calculate the no. of atoms present in

2.4 \pm 0

ozone. —

(1) $N_{A} /20$
(2) $\frac{3}{20}$
A (3) $N_{A} /4$
$(4) 31$

Topic:

Mole Concept & Redox

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Question 4

Which of the following has maximum number of atoms?

$18 g$ of $H_{2} O$
$16 g$ of $O_{2}$
$4.4 g$ of $CO_{2}$
$16 g$ of $CH_{4}$

Topic:

Mole Concept & Redox

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Question 5

The number of sulphur atoms present in

0.2

moles of

S_{8}

molecules is

$4.82 \times 1 0^{23}$
$9.63 \times 1 0^{22}$
$963 \times 1 0^{23}$
$1.20 \times 1 0^{23}$

Topic:

Mole Concept & Redox

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Question 6

ug NaOH is dissolved in

396 g H_{2} O

. mass

%

NaOH

X_{NaOl}

Topic:

Mole Concept & Redox

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Question 7

find the

%

calw) fraction of insulin in the solution. prepared by dissolving

5.65 g

of insulin and

34.35 g

of water? what is the mole fraction at ethonol

(C_{2} 1 + 50 H)

20% (ω / ω)

soln? The molality af sulphric acid (

H_{2} SO_{4})

soln

Topic:

Mole Concept & Redox

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Question 8

4. The vapour density of a gas is

11.2

. Calculate the volume occupied by

11.2 g

of the gas at NIP. [Higlenel? (11.2 litres)

Topic:

Mole Concept & Redox

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Question 9

Q Molecular weight of a compound is 144 cantion

C = 60% H = 6 \cdot 67%

and

0 = 33 \cdot 33%

compounz

Ca c u l a t

the mole culid formula of compound

Topic:

Mole Concept & Redox

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Question 10

Molecutar weight of a compound is 144 cantian

C = 60% H = 6.67%

and

0 = 33.33%

compounz Calculate the mole culied formula of compouna

Topic:

Mole Concept & Redox

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Question 11

The bond angle in

H_{2} S

(for

H - S - H

)is:

Same as that of $Cl -$
$Be - Cl$ in $BeCl_{2}$
$H$ bond angle in $NH_{3}$

Topic:

Mole Concept & Redox

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Question 12

The bond order in

O_{2}^{+}

is equal to bond order in:

$N_{2}^{+}$
$CN^{-}$
$CO$
$NO^{+}$

Topic:

Mole Concept & Redox

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Question 13

HCl

molecule in the vapour state is an example of:

Non-polar bond
Ionic bond
Polar covalent bond d) Pure covalent bond

Topic:

Mole Concept & Redox

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Question 14

The number of

σ

and

π

-bonds in a molecule of acetonitrile are respectively

Topic:

Mole Concept & Redox

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Question 15

A gas is heated in such a way so that its pressure and volume both becomes double. Again by lowering temperature, one fourth of initial number of moles of air has been taken in, to maintain the double volume and pressure. By what fraction, the temperature must have been raised finally?

$\frac{1}{5}$ times
$\frac{4}{5}$ times
$\frac{16}{5}$ times
$\frac{8}{5}$ times

Topic:

Mole Concept & Redox

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Question 16

Equal masses of ethane and hydrogen are mixed in an empty container at

2 5^{\circ} C

. The fraction of the total pressure exerted by hydrogen is

$1 : 2$
$1 : 1$
$1 \cdot 16$
$15 : 16$

Topic:

Mole Concept & Redox

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Question 17

10 g each of

CH_{4}

and

O_{2}

are kept in cylinders of same volume under same temperatures, give the pressure ratio of two gases

$2 : 1$
$1 : 4$
$2 : 3$
$3 : 4$

Topic:

Mole Concept & Redox

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Question 18

96.

In Electrophilic substitution occurs at ortho/para at first

meta at first ring
ring

Topic:

Mole Concept & Redox

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Question 19

second ring 97. Zero inductive effect is shown by :

$C_{6} H_{5}$ -
$- H$
$CH_{3}$ -
$Cl -$

Topic:

Mole Concept & Redox

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Question 20

Zero inductive effect is shown by :

$C_{6} H_{5} -$
$- H$
$CH_{3} -$
$Cl -$

Topic:

Mole Concept & Redox

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Solution for Class 11, Chemistry, Mole Concept Redox

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