1
MCQ (Single Correct Answer)

JEE Main 2018 (Online) 15th April Evening Slot

Lithium aluminium hydride reacts with silicon tetrachloride to form :
A
LiCl,   AlH3  and   SiH4
B
LiCl,  AlCl3  and  SiH4
C
LiH,   AlCl3  and  SiCl2
D
LiH,  AlH3   and   SiH4

Explanation

LiAlH4 + SiCl4  $$\buildrel \, \over \longrightarrow $$  LiCl + AlCl3 + SiH4
2
MCQ (Single Correct Answer)

JEE Main 2019 (Online) 9th January Morning Slot

The alkaline earth metal nitrate that does not crystallise with water molecules, is :
A
Mg(NO3)2
B
Sr(NO3)2
C
Ca(NO3)2
D
Ba(NO3)2

Explanation

When central atom size is smaller then more water molecule will crystallize. Ba(NO3)2 does not ctystallize with water as size of Ba+2 ion is very large.
3
MCQ (Single Correct Answer)

JEE Main 2019 (Online) 9th January Evening Slot

The metal that forms nitride by reacting directly with N2 of air, is :
A
K
B
Li
C
Rb
D
Cs

Explanation

Only Li react directly with N2 out of alkali metals

6 Li + N2 $$ \to $$ 2Li3N
4
MCQ (Single Correct Answer)

JEE Main 2019 (Online) 10th January Morning Slot

The metal used for marking X–ray tube window is :
A
Ca
B
Na
C
Mg
D
Be

Explanation

''Be'' Metal is used in x-ray window is due to transparent to x-rays.

Questions Asked from s-Block Elements

On those following papers in MCQ (Single Correct Answer)
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JEE Main 2018 (Online) 15th April Evening Slot (1)
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JEE Main 2019 (Online) 9th January Morning Slot (1)
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JEE Main 2019 (Online) 9th January Evening Slot (1)
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JEE Main 2019 (Online) 9th April Morning Slot (1)
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JEE Main 2019 (Online) 10th April Morning Slot (1)
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JEE Main 2019 (Online) 10th April Evening Slot (1)
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JEE Main 2019 (Online) 12th April Evening Slot (1)
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