A, X, Y, and Z in the above-mentioned reaction are:
 

	A	X	Y	Z
1.	Methoxy- methane	Ethanol	Ethanoic acid	Semicarbazone
2.	Ethanal	Ethanol	But - 2 - enal	semicarbazone
3.	Ethanol	Acetaldehyde	Butanone	Hydrazone
4.	Methoxy- methane	Ethanoic acid	Acetate	Hydrazine

Which product is generated when cyclohexanone undergoes
aldol condensation and is subsequently heated?

1.		2.
3.		4.

Which of the following pairs of species have the same bond order?

1. $O_2^{-},N{O}^{+}$

2. $C{N}^{-},CO$

3. $N_2, O_2^{-}$

2. CO, NO

Extraction of gold and silver involves leaching with CN^- ion. Silver is later recovered by:

1. Distillation

2. Zone refining

3. Displacement with Zn

4. Liquation

A 20-litre container at 400 K contains CO₂ (g) at pressure 0.4 atm and an excess of SrO (neglecting the volume of solid SrO). The volume of the container is now decreased by moving the movable piston fitted in the container.
The maximum volume of the container, when the pressure of CO₂ attains its maximum value will be:
(Given that: SrCO₃(s) ⇋ SrO(s) + CO₂(g) , Kp = 1.6 atm) 

The correct statement among the following regarding [Mn(CN)₆]^3-is:

1. It is sp³d² hybridized and tetrahedral.

2. It is d²sp³ hybridized and octahedral.

3. It is dsp² hybridised and square planar.

4. It is sp³d² hybridised and octahedral.

The reason for a greater range of oxidation states in actinoids is attributed to:

1. Actinoid contraction

2. 5f, 6d and 7s levels having comparable energies.

3. 4f and 5d levels being close in energies.

4. The radioactive nature of actinoids

Which of the following statements is not correct?

Which one of the following statements is correct with reference to enzymes?

1. Holoenzyme= Apoenzyme+Coenzyme

2. Coenzyme= Apoenzyme+Holoenzyme

3. Holoenzyme= Coenzyme+ CO-factor

4. Apoenzyme=Holoenzyme+Coenzyme

A decrease in blood pressure/volume will not cause the release of?

1. Atrial natriuretic factor

2. Aldosterone

3. ADH

4. Renin