S and P Block Elements Test

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S and P Block Elements Test - 4

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Weekly Quiz Competition

Question 1
1 / -0

Living in the atmosphere of CO is dangerous because it -

A
Reduces organic matter of tissues

B
Dries up the blood

C
Combines with haemoglobin of blood and makes it incapable to absorb oxygen

D
Combines with O₂ present inside to form CO₂

Solution

Combine with hameoglobin of blood and makes it incapable to absorb oxygen.
Question 2
1 / -0

The green house effect is because of the -

A
Presence of CO₂ and chlorofluoro-hydrocarbons in the atmosphere

B
Presence of O₃ and CH₄ in the atmosphere

C
Presence of NO₂ only in the atmosphere

D
All of the above

Solution

Presence of CO₂, Nitrous oxide, ozone, methane and Freons do not allow the radiations to return back in the environment which causes the rise in temperature.
Question 3
1 / -0

The power of halides of boron to act as lewis acids decreases in the order -

A
BF₃>BCl₃>BBr₃

B
BBr₃>BCl₃>BF₃

C
BCl₃>BF₃>BBr₃

D
BCl₃>BBr₃>BF₃

Solution

Order of lewis acid strength of boron. halides is
BI₃ > BBr₃ > BCl₃ > BF₃
This order is explained on the basic of pπ – pπ back bonding
opposite to expected order due to electronegavity
Question 4
1 / -0

There are 10 neutrons in the nucleus of the element _ZM¹⁹. It belongs to -

A
f-block

B
s-block

C
d-block

D
None of these

Solution

_zM¹⁹ = 19 – 10
Z = 9 it is p-block element.

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S and P Block Elements Test - 4

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S and P Block Elements Test - 4

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Question 1

Reduces organic matter of tissues

Dries up the blood

Combines with haemoglobin of blood and makes it incapable to absorb oxygen

Combines with O2 present inside to form CO2

Solution

Question 2

Presence of CO2 and chlorofluoro-hydrocarbons in the atmosphere

Presence of O3 and CH4 in the atmosphere

Presence of NO2 only in the atmosphere

All of the above

Solution

Question 3

BF3>BCl3>BBr3

BBr3>BCl3>BF3

BCl3>BF3>BBr3

BCl3>BBr3>BF3

Solution

Question 4

f-block

s-block

d-block

None of these

Solution

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Combines with O₂ present inside to form CO₂

Presence of CO₂ and chlorofluoro-hydrocarbons in the atmosphere

Presence of O₃ and CH₄ in the atmosphere

Presence of NO₂ only in the atmosphere

BF₃>BCl₃>BBr₃

BBr₃>BCl₃>BF₃

BCl₃>BF₃>BBr₃

BCl₃>BBr₃>BF₃