Haloalkanes and Haloarenes — Chemistry STD 12 Science — Question

In a reaction between A and B, the initial rate of reaction was measured for different initial concentrations of A and B as given below:

A/mol L-1	0.20	0.20	0.40
B/mol L-1	0.30	0.10	0.05
ro/mol L-1s-1	5.07 x 10-5	5.07 x 10-5	1.43 x 10-4

What is the order of the reaction with respect to A and B ?

The following results have been obtained during the kinetic studies of the reaction:

2A + B → C + D

Experiment	[A]/mol L-1	[B]/mol L-1	Initial rate of formation of D/mol L-1 min-1
I	0.1	0.1	6.0 × 10-3
II	0.3	0.2	7.2 × 10-2
III	0.3	0.4	2.88 × 10-1
IV	0.4	0.1	2.40 × 10-2

Determine the rate law and the rate constant for the reaction.

Explain by giving an equation how the presence of carbonyl group and five -OH groups in the structure of glucose is determined ### Write the equation reactions of glucose with NH, OH, HCN, and acetic anhydride and state what information is obtained about the structure of glucose through it.

An organic compound (A) has characteristic odour. On treatment with NaOH, it forms compounds (B) and (C). Compound (B) has molecular formula C₇H₈O which on oxidation gives back (A). The compound (C) is a sodium salt of an acid. When (C) is treated with soda-lime, it yields an aromatic compound (D). Deduce the structures of (A), (B), (C) and (D). Write the sequence of reactions involved.

Discuss the nature of bonding in metal carbonyls.

What are nucleic acids ?

Give reasons for the following:

1. The transition metals generally form coloured compounds.
2. E^o value for (Mn³⁺|Mn²⁺) is highly positive than that for (Cr³⁺|Cr²⁺) couple.
3. The chemistry of actinoids elements is not so smooth as that of the lanthanoids.