Match the following:

Fill in the blanks by choosing the appropriate word/words from those given in the
brackets:
(increases, decreases, positive, efficient, 68, non-efficient, no α-hydrogen, α-hydrogen,
negative, Rosenmund’s, greater, Cannizzaro, 74, common-ion effect, lesser, buffer
action, diamagnetic, paramagnetic)

(i) The more__________ the standard reduction potential of a metal, the ________ is
its ability to displace hydrogen from acids.

(ii) Both ccp and hcp are ____________ packings and occupy about _________% of
the available space.

(iii) Solubility of silver chloride _____________ in the presence of sodium chloride
because of _____________.

(iv) Benzaldehyde undergoes ___________ reaction on treatment with concentrated
sodium hydroxide because it has ___________ atom.

(v) The transition metals show ______________ character because of the presence of
unpaired electrons and Cu+ is _____________because its electronic configuration
is [Ar]3d10.

Complete the following statements by selecting the correct alternative from the choices given:

The molal freezing point constant of water is 1·86 K kg mol-1 . Therefore, the freezing point of 0·1M NaCl solution in water is expected to be:

• -1·86^oC

• -0·372^oC

• -0·186^oC

• -0·186^oC

Complete the following statements by selecting the correct alternative from the
choices given:

For a first order reaction the rate constant for decomposition of N₂O₅ is 6×10-4sec-1.
The half-life period for the decomposition in seconds is:

• 11·55

• 115·5

• 1155

• 1155

Complete the following statements by selecting the correct alternative from the
choices given:

When acetaldehyde is treated with Grignard reagent, followed by hydrolysis the
product formed is:

• Primary alcohol

• Secondary alcohol

• Carboxylic acid

• Carboxylic acid

Complete the following statements by selecting the correct alternative from the choices given:

 The geometry of XeF₆ molecule and the hybridization of Xe atom in the molecule is:

• Distorted octahedral and sp³d³

• Square planar and sp³d²

• Pyramidal and sp³

• Pyramidal and sp³

Complete the following statements by selecting the correct alternative from the
choices given:

In the complexes [Fe(CN)6]^3- and [Pt(en) (H₂O)2(NO₂)(Cl)]₂⁺ the respective
oxidation numbers of central metal atoms are :

• + 3 and +4

• +6 and +4

• +6 and +3

• +6 and +3

Answer the following questions: 
What is the effect of temperature on the ionic product of water? How will it change the pH value of a neutral solution?

Answer the following questions: 

How many hours does it take to reduce 3 moles of Fe3+to Fe2+ with 2·0 A current intensity?

Answer the following questions: 

How is urea prepared by Wohler synthesis?