Which of the following plant material is an efficient water imbibant
Options
(a) lignin (b) pectin (c) agar (d) cellulose
Correct Answer:
agar
Explanation:
Adsorption of water by a substance (solids-colloids) is known […]
Nobel prize for medicine was given for confirming the role of Helicobacter pylori in causing
Options
(a) nephritis (b) rhinitis (c) bronchitis (d) peptic ulcer
Correct Answer:
peptic ulcer
Explanation:
For their discovery […]
Helium is used in balloons in place of hydrogen because it is
Options
(a) radioactive (b) more abundant than hydrogen (c) incombustible (d) lighter than hydrogen
Correct Answer:
incombustible
Explanation:
Helium is used […]
A gas deviates from ideal behaviour at a high pressure because its molecules
Options
(a) have kinetic energy (b) are bound by covalent bonds (c) attract one another (d) show the Tyndall effect
Oxalosuccinic acid, an intermediary compound of Krebs’ cycle is a
Options
(a) 5 carbon compound (b) 6 carbon compound (c) 4 carbon compound (d) 3 carbon compound
Correct Answer:
6 carbon compound
Explanation: […]
The base principle of Cottrell’s precipitator is
Options
(a) neutralisation of charge on colloidal particles (b) scattering of light (c) Le-chatrlier’s principle (d) peptisation
Correct Answer:
neutralisation of charge on colloidal particles
₉₂U²³⁵ undergoes successive disintegrations with the end product of ₈₂P²⁰³. The number of α and β-particles emitted are
Options
(a) α=8,β=6 (b) α=3,β=3 (c) α=6,β=4 (d) α=6,β=0
Correct Answer:
α=8,β=6
Explanation:
₉₂U²³⁵ → end […]
Mass of 0.1 mole of methane is
Options
(a) 1.6 g (b) 0.1 g (c) 1 g (d) 16 g
Correct Answer:
16 g
Explanation:
No explanation available. Be the first to write […]
There are 64 codons in the genetic dictionary as
Options
(a) there are 3 nonsense codons and 61 sense codons (b) there are 64 different types of tRNA (c) there are 64 amino […]
Bennedict’s reagent test is conducted to confirm the presence of
Options
(a) polysachharides like starch (b) lipids (c) reducing sugars (d) proteins
Correct Answer:
reducing sugars
Explanation:
All those sugars which have free […]
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