Some Basic Concepts of Chemistry Test

Result

Some Basic Concepts of Chemistry Test - 11

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Weekly Quiz Competition

Question 1
4 / -1

n g of a substance X reacts with m g of substance Y to form p g of substance R and q g of substance S.
This reaction can be represented as follow : X +Y = R + S
The relation which can be established in the amounts of the reactants and the products will be

A
n – m = p – q

B
n + m = p + q

C
n = m

D
p = q

Solution
Question 2
4 / -1

100 ml of 0.1 N hypo decolourised iodine by the addition of x g of crystalline copper sulphate to excess of KI. The value of ‘x’ is :
(molecular wt. of CuSO₄. 5H₂O is 250).

A
5.0 g

B
1.25 g

C
2.5 g

D
4 g

Solution
Question 3
4 / -1

A gaseous mixture contains CH₄ and C₂H₆ in equimolecular proportion. The weight of 2.24 litres of this mixture at NTP is :

A
4.6 g

B
1.6 g

C
2.3 g

D
23 g

Solution
Question 4
4 / -1

In an organic compound of molar mass 108 g/ mol , C,H and N atoms are present in 9 : 1 : 3.5 by weight Molecular formula can be

A
C₆H₈N₂

B
C₆H₁₀N

C
C₅H₆N₃

D
C₄H₁₈N₃

Solution
Question 5
4 / -1

In the standardization of Na₂S₂O₃ using K₂Cr₂O₇ by iodometry, the equivalent weight of K₂Cr₂O₇ is

A

B

C

D
same as molar mass

Solution
Question 6
4 / -1

A
0.01, 0.01

B
0.02, 0.01

C
0.01,0.02

D
0.02, 0.02

Solution
Question 7
4 / -1

How many moles of electron weight one kilogram ?

A

B

C

D

Solution
Question 8
4 / -1

Chose the incorrect statement .

A
The constituents of a compound cannot be separated into simpler substances by physical meth- ods.

B
An element is consists of only one type of particles and these particles may be atoms or molecules.

C
The properties of a compound are same as its constituent elements.

D
Atoms of different elements are different in nature.
Question 9
4 / -1

Identify the incorrect unit conversion factor.

A

B

C

D
None of these
Question 10
4 / -1

90 g KClO₃ on heating gives 2.96 g KCl and 1.92 g oxygen. Which of the following laws is illustrated by this statement ?

A
Law of definite proportion

B
Law of mass conservation

C
Law of multiple proporation

D
Avogadro’s law