31.

The most abundant noble gas in atmosphere is

• neon

• argon

• xenon

• krypton

Average rate of reaction for the following reaction.

$2{\mathrm{SO}}_2\left(\mathrm{g}\right) + {\mathrm{O}}_2\left(\mathrm{g}\right) \to 2{\mathrm{SO}}_3\left(\mathrm{g}\right)$ is written as

• $\frac{∆\left[{\mathrm{SO}}_2\right]}{∆\mathrm{t}}$

• $-\frac{∆\left[{\mathrm{O}}_2\right]}{∆\mathrm{t}}$

• $\frac{1}{2}\frac{∆\left[{\mathrm{SO}}_2\right]}{∆\mathrm{t}}$

• $\frac{∆\left[{\mathrm{SO}}_3\right]}{∆\mathrm{t}}$

Select the correct statement for thermoplastic polymer.

• It does not become soft on heating under pressure

• It cannot be remoulded

• It is either linear or branched chain polymer

• It is a cross- linked polymer.

Which of the following is not an analgesic?

• Ofloxacin

• Penicillin

• Aminoglycosides

• Paracetamol

Butylated hydroxy anisole is a/an

• antioxidant

• cleansing agent

• disinfectant

• antihistamine

The amine 'A' when treated with nitrous acid gives yellow oily substance. The amine A is

• triethylamine

• trimethylamine

• aniline

• methylphenylamine

Bullet proof helmets are made from

• lexan

• saran

• glyptal

• thiokol

lsopropyl methyl ether when treated with cold hydrogen iodide gives

• isopropyl iodide and methyl iodide

• isopropyl alcohol and methyl iodide

• isopropyl alcohol and methyl alcohol

• isopropyl iodide and methyl alcohol

Glucose on oxidation with bromine water yields gluconic acid. This reaction confirms the presence of

• six carbon atoms linked in straight chain

• secondary alcoholic group in glucose

• aldehyde group in glucose

• primary alcoholic group in glucose

Select the compound which on treatment with nitrous acid liberates nitrogen.

• Nitroethane

• Triethylamine

• Diethylamine

• Ethylamine