1
JEE Main 2023 (Online) 29th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements :

Statement I : Nickel is being used as the catalyst for producing syn gas and edible fats.

Statement II : Silicon forms both electron rich and electron deficient hydrides.

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

A
Statement I is correct but statement II is incorrect
B
Both the statements I and II are correct
C
Both the statements I and II are incorrect
D
Statement I is incorrect but statement II is correct
2
JEE Main 2023 (Online) 29th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The set of correct statements is :

(i) Manganese exhibits +7 oxidation state in its oxide.

(ii) Ruthenium and Osmium exhibit +8 oxidation in their oxides.

(iii) Sc shows +4 oxidation state which is oxidizing in nature.

(iv) Cr shows oxidising nature in +6 oxidation state.

A
(ii), (iii) and (iv)
B
(ii) and (iii)
C
(i) and (iii)
D
(i), (ii) and (iv)
3
JEE Main 2023 (Online) 29th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

An indicator 'X' is used for studying the effect of variation in concentration of iodide on the rate of reaction of iodide ion with $$\mathrm{H_2O_2}$$ at room temp. The indicator 'X' forms blue coloured complex with compound 'A' present in the solution. The indicator 'X' and compound 'A' respectively are :

A
Methyl orange and $$\mathrm{H_2O_2}$$
B
Methyl orange and iodine
C
Starch and $$\mathrm{H_2O_2}$$
D
Starch and iodine
4
JEE Main 2023 (Online) 25th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A chloride salt solution acidified with dil.HNO$$_3$$ gives a curdy white precipitate, [A], on addition of AgNO$$_3$$. [A] on treatment with NH$$_4$$OH gives a clear solution B. A and B are respectively :

A
$$\mathrm{H[AgCl_3]~\&~(NH_4)[Ag(OH)_2]}$$
B
$$\mathrm{AgCl~\&~[Ag(NH_3)_2]Cl}$$
C
$$\mathrm{H[AgCl_3]~\&~[Ag(NH_3)_2]Cl}$$
D
$$\mathrm{AgCl~\&~(NH_4)[Ag(OH)_2]}$$
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