Some Basic Concepts of Chemistry Test

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Some Basic Concepts of Chemistry Test - 15

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Weekly Quiz Competition

Question 1
4 / -1

Volume occupied by one molecule of water (d = 1 gm cm^-3) is

A
9 x 10^-23cm³

B
6.02 x 10^-23cm³

C
3 x 10^-23cm³

D
5.5 x 10^-23cm³
Question 2
4 / -1

An ore contains 1.24% of the mineral Argentine Ag₂ S by mass. How many grams of this ore would have to be processed in order to obtain 1.0 g of pure solid silver ?

A
23.15 g

B
69.45 g

C
92.6 g

D
46.3 g

Solution
Question 3
4 / -1

Find the electric charge in coulomb of 9.0 gm of Al³⁺ ions.

A
9.6 × 10⁴

B
6.9 × 10⁴

C
2.9 × 10⁵

D
4.80 × 10^-19

Solution
Question 4
4 / -1

Two containers P and Q of equal volumes contain 6 g of O₂ and SO₂ respectively at 300 K and 1 atmosphere. Then

A
No. of molecules in P is less than that in Q

B
No. of molecules in Q is less than that in P

C
No. of molecules in P and Q are same.

D
cannot be determined
Question 5
4 / -1

Which of the following pairs of substances illustrates the law of multiple proportions ?

A
CO and CO₂

B
NaCl and NaBr

C
H₂O and D₂O

D
MgO and Mg(OH)₂
Question 6
4 / -1

A : Normality of 0.1M H₂SO₄ is 0.2 N.
R : H₂SO₄ is a dibasic acid.

A
If both A and R are correct and R is the correct explanation of A.

B
If both A and R are correct and R is not the correct explanation of A.

C
If A is correct R is wrong.

D
If both A and R are false.
Question 7
4 / -1

A : 1 Gram molecule of sulphur also represents 1 gram atom of sulphur.
R : Atomic city of sulphur is one.

A
If both A and R are correct and R is the correct explanation of A.

B
If both A and R are correct and R is not the correct explanation of A.

C
If A is correct R is wrong.

D
If both A and R are false.
Question 8
4 / -1

A : In the equation NH₃ + HCl → NH₄Cl, Gay-Lussac’s law is not applicable to NH₄Cl.
R : NH₄Cl is not a gas,.

A
If both A and R are correct and R is the correct explanation of A.

B
If both A and R are correct and R is not the correct explanation of A.

C
If A is correct R is wrong.

D
If both A and R are false.
Question 9
4 / -1

A : Atomic mass of sodium is 23 u.
R : An atom of sodium is 23 times heavier than an atom of ¹²C.

A
If both A and R are correct and R is the correct explanation of A.

B
If both A and R are correct and R is not the correct explanation of A.

C
If A is correct R is wrong.

D
If both A and R are false.
Question 10
4 / -1

A : Pure water, irrespective of its source always contain hydrogen and oxygen in the ratio 1 : 8 by mass.
R : Total mass of reactants and products remains constant during physical or chemical change.

A
If both A and R are correct and R is the correct explanation of A.

B
If both A and R are correct and R is not the correct explanation of A.

C
If A is correct R is wrong.

D
If both A and R are false.

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Re-Attempt Weekly Quiz Competition

Some Basic Concepts of Chemistry Test - 15

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Some Basic Concepts of Chemistry Test - 15

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SHARING IS CARING

Question 1

9 x 10-23cm3

6.02 x 10-23cm3

3 x 10-23cm3

5.5 x 10-23cm3

Question 2

23.15 g

69.45 g

92.6 g

46.3 g

Solution

Question 3

9.6 × 104

6.9 × 104

2.9 × 105

4.80 × 10-19

Solution

Question 4

No. of molecules in P is less than that in Q

No. of molecules in Q is less than that in P

No. of molecules in P and Q are same.

cannot be determined

Question 5

CO and CO2

NaCl and NaBr

H2O and D2O

MgO and Mg(OH)2

Question 6

If both A and R are correct and R is the correct explanation of A.

If both A and R are correct and R is not the correct explanation of A.

If A is correct R is wrong.

If both A and R are false.

Question 7

If both A and R are correct and R is the correct explanation of A.

If both A and R are correct and R is not the correct explanation of A.

If A is correct R is wrong.

If both A and R are false.

Question 8

If both A and R are correct and R is the correct explanation of A.

If both A and R are correct and R is not the correct explanation of A.

If A is correct R is wrong.

If both A and R are false.

Question 9

If both A and R are correct and R is the correct explanation of A.

If both A and R are correct and R is not the correct explanation of A.

If A is correct R is wrong.

If both A and R are false.

Question 10

If both A and R are correct and R is the correct explanation of A.

If both A and R are correct and R is not the correct explanation of A.

If A is correct R is wrong.

If both A and R are false.

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9 x 10^-23cm³

6.02 x 10^-23cm³

3 x 10^-23cm³

5.5 x 10^-23cm³

9.6 × 10⁴

6.9 × 10⁴

2.9 × 10⁵

4.80 × 10^-19

CO and CO₂

H₂O and D₂O

MgO and Mg(OH)₂