EASY

Earn 100

One part of an element $A$ combines with two parts of another element $B$ . 6 parts of element $C$ combines with 4 parts of $B$ . If $A$ and $C$ combine together, the ratio of their weights, will be governed by

44.44% studentsanswered this correctly

Important Questions on Some Basic Concepts of Chemistry

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

x

is the mean proportional between

12.8

and

64.8

and

y

is the third proportional to

38.4

and

57.6

, then

2 x : y

is equal to:

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

A person carries $₹ 165$ in the form of currency notes of $₹ 5$ , $₹ 10$ and $₹ 20$ in the ratio of $3 : 2 : 1$ . What is the value of currency notes of $₹ 20$ denomination?

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

2 x + 1, x + 2, 2

and

5

are in proportion, then what is the mean proportional between

3.5 (1 - x)

and

8 (1 + x) ?

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

A sum is divided among

A, B, C

and

D

such that the ratio of the shares of

A

and

B

2 : 3

, that of

B

and

C

1 : 2

and that of

C

and

D

3 : 4

. If the difference between the shares of

A

and

D

₹ 648

, then the sum of their shares is:

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

Gita, Shweta and Sita invested

Rs . 4200

Rs . 8400

and

Rs . 5400

respectively while starting a business. At the end of the year, they earned a profit of

Rs . 24, 000

. Sita invested

32 %

of her share of the profit in a savings scheme. How much amount is left with her?

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

Two numbers are in the ratio

3 : 5

. If

13

is subtracted from each, the new numbers are in the ratio

10 : 21

. If

15

is added to each of the original number, then the ratio becomes:

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

What is the $4th$ proportional of $3, 8, 12$ ?

1. $36$

2. $26$

3. $32$

4. $16$

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

Alloy

A

contains copper and zinc in the ratio of

4 : 3

and alloy

B

contains copper and zinc in the ratio of

5 : 2

A

and

B

are taken in the ratio of

5 : 6

and melted to form a new alloy. The percentage of zinc on the new alloy is close to:

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

A certain sum is divided among A, B and C in such way that A gets Rs.

40

more than half of the sum. B gets Rs.

120

less than three-eighths of the sum and C gets Rs.

200

. What is the total sum?

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

In a class of

80

students and

5

teachers, each student got sweets that are

15 %

of the total number of students and each teacher got sweets that are

25 %

of the total number of students. How many sweets were there?

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

(5 x + 2 y) : (10 x + 3 y) = 5 : 9

, then

(2 x^{2} + 3 y^{2}) : (4 x^{2} + 9 y^{2}) = ?

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

56.0 L

of nitrogen gas is mixed with excess of hydrogen gas and it is found that

20 L

of ammonia gas is produced, The volume of unused nitrogen gas is found to be_____

L

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

What is the ratio of mean proportional between

1.8

and

3.2

and the third proportional of

5

and

3

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

What

x

is added to each of

10, 16, 22, 32

the numbers so obtained in this order are in proportion? What is the mean proportion between the numbers

(x + 1)

and

(3 x + 1)

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

A sum of

₹ x

is divided among

A

B

,and

C

such that the ratio of the shares of

A

and

B

6 : 7

and that of

B

and

C

3 : 2

. If the difference between the shares of

A

and

C

₹ 540

, then the value of

x

is;

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

What is the sum of the mean proportional between

10.8

and

4.8

and the third proportional of

2

and

4

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

What is the ratio of mean proportional between

3.6

and

12.1

and third proportional between

2

and

11

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

20 litre

mixture contains milk and water in the ratio

3 : 2

. Then

10 litres

of the mixture is removed and replaced with pure milk and the operation is repeated once more. At the end of the two removals and replacements, what is the ratio of milk and water in the resultant mixture?

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

Rs.

730

were divided among

A

B

and

C

in such a way that if

A

gets Rs.

3

, then

B

gets Rs.

4

and if

B

gets Rs.

3.50

, then

C

gets Rs.

3

. The share of

B

exceeds that of

C

by:

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

Which of the following is an example of Law of multiple proportion?

One part of an element A combines with two parts of another element B. 6 parts of element C combines with 4 parts of B. If A and C combine together, the ratio of their weights, will be governed by

Important Questions on Some Basic Concepts of Chemistry

Learn and Prepare for any exam you want !

One part of an element $A$ combines with two parts of another element $B$ . 6 parts of element $C$ combines with 4 parts of $B$ . If $A$ and $C$ combine together, the ratio of their weights, will be governed by