Match the reactions given in column-I with the suitable reagent given in column-II column-I column-II (i) Benzophenone → Diphenylmethane (a) LiAlH 4 (ii) Benzaldehyde → 1 -Phenyl ethanol (b) Dibal - H (iii) Cyclohexanone → Cyclohexanol (c) Zn ( Hg ) / conc. H Cl (iv) Phenylbenzoate → Benzaldehyde (d) CH 3 MgBr

( i ) - ( c ) , ( ii ) - ( d ) , ( iii ) - ( a ) , ( iv ) - ( b )

( i ) - ( c ) , ( ii ) - ( d ) , ( iii ) - ( b ) , ( iv ) - ( a )

( i ) - ( d ) , ( ii ) - ( c ) , ( iii ) - ( a ) , ( iv ) - ( b )

( i ) - ( d ) , ( ii ) - ( a ) , ( iii ) - ( c ) , ( iv ) - ( b )

In the reaction sequence RCOCl + H 2 ⟶ Pd + BaSO 4 A ⟶ HCN B ⟶ H , O ⊕ C A , B and C are given by the set :-

RCHO , RCH ( OH ) CN , RCH ( OH ) COOH

RCHO , RCH ( OH ) CN , RCH ( OH ) CH 2 NH 2

RCHO , R - CH 2 - CN , R - CH 2 - COOH

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Formalin is a solution of ………… in water.

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What is Formalin? Write its use.

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$P \overset{H_{2} / Pd - {BaSO}_{4}}{\to} Q \to_{(ii) dil . HCl}^{(i) conc . NaOH} R + S$

$R$ and $S$ form benzyl benzoate when treated with each other. Hence, $P$ is

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40 %

aqueous solution of methanal is known as

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What is the percentage of formaldehyde in formalin?

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Formalin is an aqueous solution of

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An aldehyde molecule used to manufacture the dye, malachite green is

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Which of the following statement is wrong :

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In a bakelite polymer, which of the following aldehydes is used?

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Which of the following compounds is used in the preservation of biological specimens?

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Formalin is

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Which of the following reagents would distinguish cis-cyclopenta-

1, 2

- diol from the trans-isomer?

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The product

' B'

is :-

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Which aldehyde is used to preserve biological specimens?

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Match the reactions given in column-I with the suitable reagent given in column-II

	column-I		column-II
(i)	Benzophenone $\to$ Diphenylmethane	(a)	${LiAlH}_{4}$
(ii)	Benzaldehyde $\to 1$ -Phenyl ethanol	(b)	$Dibal - H$
(iii)	Cyclohexanone $\to$ Cyclohexanol	(c)	$Zn (Hg) / conc. H Cl$
(iv)	Phenylbenzoate $\to$ Benzaldehyde	(d)	${CH}_{3} MgBr$

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An aldehyde used to preserve biological specimens is

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Which of the following is an ingrain dye?

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Which of the following is used in the manufacture of thermosetting plastics

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The major product of the following reaction is:

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Milk can be preserved by adding a few drops of:

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In the reaction sequence

RCOCl + H_{2} \overset{Pd + {BaSO}_{4}}{⟶} A \overset{HCN}{⟶} B \overset{H, O^{\oplus}}{⟶} C

A, B

and

C

are given by the set :-

Formalin is a solution of ………… in water.

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