Define Isotop?
Define Mass number?
Define atomic number?
An element having atomic number and mass number is 20 and 40 respectively. Then name element and find number of neutron of the element?

Topic:

Atomic Structure

View solution

Question 64

Group - C 3. Describe briefly any two of the following.

[4 \times 2 = 8]

Write the postulates of Bohr's atomic Model?
Explain briefly Rutherford's gold foil experiment?
Explain briefly the four types of quantum numbers?

Topic:

Atomic Structure

View solution

Question 65

Calculate the mass of sodfum acetate

(CH_{2} COONa)

required to make

500 mL

0.375

molar aqueous solution. Molar mass of sodium acetate is

82.0245 g mol^{- 1}

Topic:

Mole Concept & Redox

View solution

Question 66

Select the correct option from the following.

and (b) only
and (d) only::, (b) and (d) only
only

Topic:

Mole Concept & Redox

View 3 solutions

Question 67

(1.) Determine the volume/volume percent solution made by combining

25 mL

of ethanol with enough water to produce 200

mL

of the solution:

$12.5$
20
40
25

Topic:

Mole Concept & Redox

View 2 solutions

Question 68

Problem

1.8

The density of

3 M

solution of

NaCl

1.25 g mk^{- 1}

. Calculate the molality of the solution.

Topic:

Mole Concept & Redox

View 16 solutions

Question 69

Problem

1.8

The density of

3 M

solution of

NaCl

1.25 g mE^{- 1}

. Calculate the molality of the solution. Solution

Topic:

Mole Concept & Redox

View 9 solutions

Question 70

A sample of hydrazine

(N_{2} H_{4})

was dissolved in

100 ml

of water.

10 ml

portion of this solution requires

10 mL

, of

0.6 M FeCl_{3}

solution. The molarity of

N_{2} H_{4}

4 Fe^{3 +} + N_{2} H_{4} ⟶ N_{2} + 4 Fe^{2 +} + 4 H^{+}

Topic:

Mole Concept & Redox

View solution

Found the solution, but did not understand the concept?

Connect with a tutor in less than 60 seconds 24x7

Ask my first question

Question 71

The mass of a mixture containing

HCl

and

H_{2} SO_{4}

0.1 g .

On treatment with an excess of an

AgNO_{3}

solution, reacted with this acid mixture gives

0.1435 g

AgCl

, Mass

%

of the

H_{2} SO_{4}

mixture is:

$36.5$
$63.5$

Topic:

Mole Concept & Redox

View 4 solutions

Question 72

A solution of

Na_{2} S_{2} O_{3}

is standardized iodometrically against

0.167 g

of KBrO

_{3}

. This process

$0.2 N$
$0.12 N$

Topic:

Mole Concept & Redox

View solution

Question 73

The

NH_{3}

evolved due to complete conversion of

N

from

1.12 g

sample of protein was absorbed in

45 mL

0.4 N HNO_{3}

. The excess acid required

20 mL

0.1 N NaOH

. The \ \mathrm{~N}$ in the sample is:

Topic:

Mole Concept & Redox

View 7 solutions

Question 74

Find out

%

of oxalate ion in a given sample of an alkali metal oxalate salt,

0.30 g

of it is dissolved in

100 mL

water and its required

90 mL

of centimolar

KMnO_{4}

solution in acidic medium :

$66%$
$55%$
4486
$6.696$

Topic:

Mole Concept & Redox

View 2 solutions

Question 75

The concentration of bivalent lead ions in a sample of polluted water that also contains nitrate jons is determined by adding solid sodium sulphate

(M = 142)

to exactly

500 mL

. water. Calculate the molarity of lead ions if

0.355 g

of sodium sulphate was needed for complete precipitation of lead ions as sulphate.

$1.25 \times 1 0^{- 3} M$
$2.5 \times 1 0^{- 3} M$
$5 \times 1 0^{- 3} M$
None of these

Topic:

Mole Concept & Redox

View solution

Question 76

The total volume of

0.1 M KMnO_{4}

solution that are needed to oxidize

100 mg

each of ferrous oxalate and ferrous sulphate in a mixture in acidic medium is:

$1.096 mL$
$1.32 mL$
$5, 48 mL$
none of these

Topic:

Mole Concept & Redox

View solution

Question 77

When

2.5 g

of a sample of Mohr's salt reacts completely with

50 mL

\frac{N}{10} KMnO_{4}

solution. The

%

purity of the sample of Mohr's salt is :

$78.4$
70
37
40

Topic:

Mole Concept & Redox

View solution

Question 78

Ratio of moles of Fe (II) oxidised by equal volumes of equimolar

KMnO_{4}

and

K_{2} Cr_{2} O_{2}

solutions in acidic medium will be:

$5 : 3$
$1 : 1$

Topic:

Mole Concept & Redox

View solution

Question 79

The number of atoms present in

1 ml

NH_{2}

at STP is :

$17 \times 6.022 \times 1 0^{23}$
$6.022 \times 1 0^{23}$
$1.07 \times 1 0^{20}$
None of these

Topic:

Atomic Structure

View solution

Question 80

8 gms

O_{2}

at S.T.P will occupy a volume of

$22.4$ litres
$16.4$ litres
$5.6$ litres
$12.2$ litres

Topic:

Atomic Structure

View solution

1 2 3 4 5 6 7

Get instant study help from an expert tutor 24/7

Download Filo

Filters

Filters

class

subject

topic

Class 11 Chemistry Questions asked by Filo students

Found the solution, but did not understand the concept?

Ask my first question