1100-4-chtech-1mark

The ethyl alcohol content in the fermented liquor from molasses, is

• 50 - 55%

• 20 - 22%

• 8 - 10%

• 3 - 5%

1993-7-a-i-chtech-1mark

A biodegradable detergent is one which

• is manufactured using biotechnology

• contains straight chain alkyl benzenes

• contains branch chain alkyl benzenes

• is easily decomposed by micro-organisms

1993-7-a-ii-chtech-1mark

Hydrogenation of edible oils is done to

• decrease the number of unsaturated bonds

• lower the melting point of oil

• increase the thermal conductivity of oil

• enable the oil to be packed in tin containers

1997-11-d-chtech-1mark

Linear alkyl benzene sulphonate belongs to the category of 

• Detergents
  

• Perfumes
  

• Pharmaceuticals
  

• Refrigerants
  

1999-1-18-chtech-1mark

The recovery of penicillin from the acidified fermentation broth is done by

• distillation

• evaporation

• absorption

• liquid extraction

1999-1-32-chtech-1mark

Sucrose is a disaccharide consisting of

• glucose and glucose

• glucose and fructose

• glucose and galactose

• fructose and galactose

1999-1-34-chtech-1mark

Which one of the following is not likely to be constituent of vegetable oils?

• citric acid

• oleic acid

• stearic acid

• glycerol

2001-2-25-chtech-2mark

For the hydrogenation of oils, ______(i)______ is commonly used as catalyst, and ______(ii)______ is a catalyst poison.

• (i) Platinum (ii) Sulfur

• (i) Palladium (ii) Oxygen

• (i) Nickel (ii) Sulfur

• (i) Nickel (ii) Oxygen

2004-86-chtech-2mark

Multiple effect evaporators are commonly used in the manufacture of

P	Paper
Q	Superphosphate
R	Sugar
S	Fats

• P and Q

• P and R

• P and S

• R and S

2005-23-chtech-1mark

Which of the following is a detergent?

• Benzene hexachloride

• Cellulose nitrate

• Polyvinyl chloride

• Alkyl benzene sulfonate

2007-20-chtech-1mark

In the Sulfite process for paper manufacture, the "cooking liquor" is

• magnesium bisulfite and sulfur dioxide in acid medium

• magnesium sulfite and magnesium dicarbonate

• sodium sulfite and magnesium sulfite

• sodium sulfite, sodium bisulfite and sulfur dioxide

2007-68-chtech-2mark

Match the product in Group 1 with its application in the industries of Group 2.

Group 1	Group 2
P. lithium stearate	(1) cosmetics
Q. magnesium stearate	(2) paper
R. aluminiuim sulphate	(3) dry cleaning
	(4) greases

• P - 2, Q - 3, R - 1

• P - 3, Q - 4, R - 2

• P - 4, Q - 2, R - 3

• P - 4, Q - 1, R - 2

2008-70-chtech-2mark

Which ONE of the following process sequences is used in the sugar industry?

• Ca₂HPO₄/Lime Treatment \(\rightarrow \) Crystallization \(\rightarrow \) Crushing

• Ca₂HPO₄/Lime Treatment \(\rightarrow \) Multiple stage evaporation \(\rightarrow \) Crystallization

• Crushing \(\rightarrow \) Crystallization \(\rightarrow \) Ca₂HPO₄/Lime Treatment

• Multiple stage evaporation \(\rightarrow \) Crystallization \(\rightarrow \) Ca₂HPO₄/Lime Treatment

2014-25-chtech-1mark

Which ONE of the following statements is CORRECT?

• The major components of biodiesel are triglycerides

• Biodiesel is essentially a mixture of ethyl esters

• Biodiesel is highly aromatic

• Biodiesel has a very low aniline point

2016-24-chtech-1mark

Two paper pulp plants P and Q use the same quality of bamboo as a raw material. The chemicals used in their digester are as follows:

	Plant P	Plant Q
NaOH	Yes	No
Na2S	Yes	No
Na2CO3	Yes	Yes
NaHCO3	No	Yes
Na2SO3	No	Yes

Which one of the following statements is CORRECT?

• Plant P and Plant Q both use the Sulfite process

• Plant P and Plant Q both use the Kraft process

• Plant P uses Sulfite process

• Plant P uses Kraft process

1991-1-i-b-chtech-2mark

Match the following:

• Answer

1996-19-chtech-5mark

What are the catalysts employed in the following commercial reactor operations?

1. oxidation of \(\ce {SO2}\)
2. oxidation of \(\ce {NH3}\)
3. oxidation of \(\ce {C2H4}\)
4. hydrogenation of vegetable oil
5. dehydrogenation of propan-2-ol

• Answer