Ammonia and oxygen reacts at higher temperature as:

1) $$r=\dfrac{1}{4}\dfrac{d[NO]}{dt}=10\times10^{-4}$$ mol litre$$^{-1}$$ sec$$^{-1}$$
2) $$r=\dfrac{1}{4}\dfrac{d[NO]}{dt}=9\times10^{-4}$$ mol litre$$^{-1}$$sec$$^{-1}$$
3) $$r=\dfrac{1}{4}\dfrac{d[NO]}{dt}=13\times10^{-4}$$ mol litre$$^{-1}$$sec$$^{-1}$$
4) $$r=\dfrac{1}{4}\dfrac{d[NO]}{dt}=20\times10^{-4}$$ mol litre$$^{-1}$$sec$$^{-1}$$

A reagent used to test the presence of Fe⁺² ion is :

1) NH₄CNS
2) H₂S
3) K₃Fe(CN)₆
4) K₄Fe(CN)₆.

The arrangement of (CH₃)₃C−, (CH₃)₂CH−, CH₃CH₂− when attached to benzene or an unsaturated group, in increasing order of inductive effect is

$$1)\;(CH_3)_3C - < (CH_3)_2 CH - < CH_3CH_2 - \\2)\;CH_3CH_2 - < (CH_3)_2 CH - < (CH_3)_3 C- \\3)\;(CH_3)_2 CH - < (CH_3)_3 C - < CH_3CH_2 - \\4)\;(CH_3)_3 C - < (CH_3)CH_2 - < (CH_3)_2 CH-$$

Amongst LiCl, RbCl, BeCl₂ and MgCl₂ the compounds with greatest and least ionic character respectively are:

1) LiCl and RbCl
2) RbCl and BeCl₂
3) RbCl and MgCl₂
4) MgCl₂ and BeCl₂

Which of the following nucleophiles is going to promote an S_N2? reaction?

1 NaI
2) Water
3) NH₄?Cl
4) MeONa

Which of the following arrangement of molecules is correct on the basis of their dipole moments?

1) BF₃ > NF₃ > NH₃
2) NH₃ > BF₃ > NH₃
3) NH₃=NF₃ > BF₃
4) NH₃ > NF₃ > BF₃

When carbon monoxide is passed over solid caustic soda to heated to 200⁰ C, it form:

1) H-COONa
2) CH₃COONa
3) Na₂CO₃
4) NaHCO₃.

The ratio among most probable velocity, mean velocity and root mean square velocity is given by:

1) 1: 2: 3

2) 1: √2?: √3?

3) √2?: √3?: √8/π?

4) √2?: √8/π?: √3?

Among the following, identify the species with an atom in +6 oxidation state.

1) [MnO₄]⁻
2) [Cr(CN)₆]³⁻
3) Cr₂O₃
4) CrO₂Cl₂

The compound used as a preservative for food products such as tomato ketchup and fruit juices is

1) Sodium benzoate
2) Formic acid
3) Sodium Salicylate
4) Sodium acetate.