1
JEE Main 2022 (Online) 26th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The correct sequential order of the reagents for the given reaction is

JEE Main 2022 (Online) 26th July Evening Shift Chemistry - Compounds Containing Nitrogen Question 54 English

A
$$\mathrm{HNO}_{2}, \mathrm{Fe} / \mathrm{H}^{+}, \mathrm{HNO}_{2}, \mathrm{KI}, \mathrm{H}_{2} \mathrm{O} / \mathrm{H}^{+}$$
B
$$\mathrm{HNO}_{2}, \mathrm{KI}, \mathrm{Fe} / \mathrm{H}^{+}, \mathrm{HNO}_{2}, \mathrm{H}_{2} \mathrm{O} /$$ warm
C
$$\mathrm{HNO}_{2}, \mathrm{KI}, \mathrm{HNO}_{2}, \mathrm{Fe} / \mathrm{H}^{+}, \mathrm{H}_{2} \mathrm{O} / \mathrm{H}^{+}$$
D
$$\mathrm{HNO}_{2}, \mathrm{Fe} / \mathrm{H}^{+}, \mathrm{KI}, \mathrm{HNO}_{2}, \mathrm{H}_{2} \mathrm{O} /$$ warm
2
JEE Main 2022 (Online) 26th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Vulcanization of rubber is carried out by heating a mixture of

A
isoprene and styrene
B
neoprene and sulphur
C
isoprene and sulphur
D
neoprene and styrene
3
JEE Main 2022 (Online) 26th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Animal starch is the other name of

A
amylose.
B
maltose.
C
glycogen.
D
amylopectin.
4
JEE Main 2022 (Online) 26th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements: one is labelled as Assertion $$\mathbf{A}$$ and the other is labelled as Reason $$\mathbf{R}$$.

Assertion A: Phenolphthalein is a $$\mathrm{pH}$$ dependent indicator, remains colourless in acidic solution and gives pink colour in basic medium.

Reason R: Phenolphthalein is a weak acid. It doesn't dissociate in basic medium.

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

A
Both $$\mathbf{A}$$ and $$\mathbf{R}$$ are true and $$\mathbf{R}$$ is the correct explanation of $$\mathbf{A}$$.
B
Both $$\mathbf{A}$$ and $$\mathbf{R}$$ are true but $$\mathbf{R}$$ is NOT the correct explanation of $$\mathbf{A}$$.
C
A is true but R is false.
D
A is false but R is true.
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