Initial setting of cement is mainly due to :
hydration and gel formation
dehydration and gel formation
hydration and hydrolysis
dehydration and dehydrolysis
Consider the following compounds :
1. Sulphur dioxide
2. Hydrogen peroxide
3. Ozone
Among these compounds identify those that can act as bleaching agent :
1 and 3
2 and 3
1 and 2
1, 2 and 3
Barbituric acid and its derivatives are well known as:
tranquilizers
antiseptics
analgesics
antipyretics
The reagent used in the preparation of aspirin from salicylic acid is
SOCl2/ pyridine
CH3COOH / HCl
(CH2CO)2O/ Conc. H2SO4
CH3Cl/ AlCl3
Match the following:
List - I | List - II |
A. Oxyhaemoglobin | i. Analgesic |
B. Aspirin | ii. Oxygen carrier |
C. Haemoglobin | iii. Photosynthesis |
D. Chlorophyll |
iv. Oil of winter green v. Fe2+ paramagentic |
The correct match is
A - v; B - i; C - ii; D - iii
A - iv; B - ii; C - i; D - iii
A - iii; B - i; C - ii; D - iv
A - v; B - ii; C - iii; D - i
A micelle formed during the cleansing action by soap is
a discrete particle of soap
aggregated particles of soap and dirt
a discrete particle of dust
an aggregated particle of dust and water
Parkinson's disease is linked to abnormaties in the levels of dopamine in the body. The structure of dopamine is