The colour of litmus in an alkaline medium is

• A) Red
• B) Yellow
• C) Pink
• D) Blue

Calculate the volume in cm³of oxygen evolved as s.t.p. when a current of 5 A is passed through acidified water for 193s {F = 96500 C/mol, Molar volume of a gas at s.t.p. = 22.4 dm³}

• A) 224.000 dm³
• B) 0.056 dm³
• C) 0.224 dm³
• D) 56.000³

The compounds CH3CH2CHO and CH3COCH3 can be distinguished from each other using

• A) Dilute ammonia
• B) Benedict's solution
• C) Tollen's reagent
• D) Sodium hydroxide solution

Ammonium chloride can be separated from its mixture with common salt by

• A) Distillation
• B) Evaporation
• C) Decantation
• D) Sublimation

The gas that is used for the treatment of cancer is

• A) Neon
• B) Radon
• C) Xenon
• D) Argon

Which of the following statements is true about 2-methylpropane and butane

• A) They have different number of carbon atoms
• B) They are members of same homologous series
• C) They have the same boiling points
• D) They have the same chemical properties

N2O4(aq) ⇌ 2NO2(g) △ H = +ve In the reaction above, an increase in temperature will

• A) Increase the reactant production
• B) Increase the value of the equilibrium constant
• C) Shift the equilibrium to the left
• D) Decrease the value of the equilibrium constant

The monomer of nylon is

• A) Hydroxybenzene
• B) Hexanedioic acid
• C) Benzene -1,-4-dicarboxylic acid
• D) Ethane-1,2-diol

The process that requires the use of hardwater in its operation is

• A) Tanning
• B) Bottling
• C) Laundry
• D) Dyeing

The radioisotope used in industrial radiography for the rapid checking of faults in welds and casting is

• A) carbon-14
• B) phosphorus-32
• C) cobalt-60
• D) iodine-131