1
MCQ (Single Correct Answer)

JEE Main 2019 (Online) 11th January Morning Slot

The chloride that CANNOT get hydrolysed is :
A
SnCl4
B
SiCl4
C
PbCl4
D
CCl4

Explanation

CCl4 cannot get hydrolysed as it does not have dorbitals and cannot extend its covalency above four.
2
MCQ (Single Correct Answer)

JEE Main 2019 (Online) 12th January Morning Slot

Iodine reacts with concentrated HNO3 to yield Y along with other products. The oxidation state of iodine in Y, is -
A
3
B
1
C
7
D
5

Explanation

I2 + 10HNO3 $$ \to $$ 2HIO3 (Y) + 10NO2 + 4H2O

Let In HIO3 oxidation state of iodine is x.

$$ \therefore $$ +1 + x + 3(–2) = 0 $$ \Rightarrow $$ x = +5
3
MCQ (Single Correct Answer)

JEE Main 2019 (Online) 12th January Evening Slot

The element that does NOT show catenation is -
A
Ge
B
Si
C
Sn
D
Pb

Explanation


All the four given element belongs to the carbon family.

Pb will show last catenation.
4
MCQ (Single Correct Answer)

JEE Main 2019 (Online) 8th April Morning Slot

Diborane (B2H6) reacts with O2 and H2O independently, then products formed are
A
B2O3 and HBO2
B
B2O3 and H3BO3
C
HBO2 and H3BO3
D
HBO2 and HBO3

Explanation

B2H6 + 3O2 $$ \to $$ B2O3 + 3H2O

B2H6 + 6H2O $$ \to $$ 2H3BO3 + 6H2 $$ \uparrow $$

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