Chemistry Test 166

Result

Chemistry Test 166

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Weekly Quiz Competition

Question 1
4 / -1

Among the following groupings which represents the collection of isoelectronic species?

A

B

C

D

Solution
Question 2
4 / -1

The correct sequence which shows decreasing order of the ionic radii of the elements is

A

B
-

C

D

Solution

All the given species contains 10 e– each i.e. isoelectronic. For isoelectronic species anion having high negative charge is largest in size and the cation having high positive charge is smallest.
Question 3
4 / -1

Which of the following does not contain coordinate bond?

A

B

C

D

Solution
Question 4
4 / -1

Which of the following volume (V) - temperature (T) plots represents the behaviour of one mole of an ideal gas at one atmospheric pressure?

A

B

C

D

Solution
Question 5
4 / -1

Assuming that water vapour is an ideal gas, the internal energy change (DU) when 1 mol of water is vapourised at 1 bar pressure and 100°C, (given : molar enthalpy of vapourisation of water at 1 bar and will be

A

B

C

D

Solution
Question 6
4 / -1

A

B

C

D

Solution
Question 7
4 / -1

Which of the following will not displace hydrogen?

A
Ba

B
Pb

C
Hg

D
Sn

Solution

Hg will not displace hydrogen since it is present below hydrogen in ECS.
Question 8
4 / -1

Alkali metals are generally extracted by

A
reduction methods

B
double decomposition methods

C
displacement methods

D
electrolytic methods

Solution

Alkali metals are highly electropositive and thus highly reducing .Therefore reduction , double decomposition and displacement methods for their extraction are not suitable .Only electrolytic methods are useful for their extraction.
Question 9
4 / -1

Boric acid is polymeric due to

A
its acidic nature

B
the presence of hydrogen bonds

C
its monobasic nature

D
its geometry

Solution

In Boric acid each B atom is sp2 hybridized and contains units which are held together by hydrogen bonds
Question 10
4 / -1

In crystallisation process impurities which impart colour to the solution are removed by which of the following ?

A
Repeated crystallisation

B
Activated charcoal

C
Bleaching agent

D
Both (A) and (B)

Solution

Coloured impurities are removed by adsorbing over activated charcoal.