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1
JEE Main 2023 (Online) 24th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Which of the Phosphorus oxoacid can create silver mirror from $$\mathrm{AgNO_3}$$ solution?

A
$$\mathrm{H_4P_2O_5}$$
B
$$\mathrm{H_4P_2O_7}$$
C
$$\mathrm{(HPO_3)_n}$$
D
$$\mathrm{H_4P_2O_6}$$
2
JEE Main 2022 (Online) 29th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

In liquation process used for tin (Sn), the metal :

A
is reacted with acid.
B
is dissolved in water.
C
is brought to molten form which is made to flow on a slope.
D
is fused with NaOH
3
JEE Main 2022 (Online) 29th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements.

Statement I : Stannane is an example of a molecular hydride.

Statement II : Stannane is a planar molecule.

In the light of the above statement, choose the most appropriate answer from the options given below.

A
Both Statement I and Statement II are true.
B
Both Statement I and Statement II are false.
C
Statement I is true but Statement II is false.
D
Statement I is false but Statement II is true.
4
JEE Main 2022 (Online) 29th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

When borax is heated with $$\mathrm{CoO}$$ on a platinum loop, blue coloured bead formed is largely due to :

A
$$\mathrm{B}_{2} \mathrm{O}_{3}$$
B
$$\mathrm{Co}\left(\mathrm{BO}_{2}\right)_{2}$$
C
$$\mathrm{CoB}_{4} \mathrm{O}_{7}$$
D
$$\mathrm{Co}\left[\mathrm{B}_{4} \mathrm{O}_{5}(\mathrm{OH})_{4}\right]$$
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