Correct Answer:- Option-B
Question58:-Value of absolute zero is,

Az--273°C

B:-273°C

C:-0°C

D:-273K

Correct Answer:- Option-A

Question59:-The minimum energy required to remove the most loosely bound electron from an isolated gaseous atom is
called its,

A:-Electronegativity
B:-Electropositivity
:-lonisation energy
D:-Electron gain enthalpy
Correct Answer:- Option-C
Question60:-Maximum number of electrons that can be accommodated in a shell is,
A:-2n?
B:-r?
C:-2n
D:-n
Correct Answer:- Option-A
Question61:-Which of the following is a unicellular green algae that is motile and with a light sensitive "eyespot"
A:-Chlamydomonas
-Hydra
C:-Spirogyra
D:-Chlorella
Correct Answer:- Option-A
Question62:-Plant hormone used in the ripening of fruits is
A:-Auxin
B:-Gibbrellin
C:-Ethylene
D:-Abscissic Acid
Correct Answer:- Option-C
Question63:-A viral disease of plant that spreads through aphides in the following is
A:-Coconut budrot
-Bunchytop of banana
C:-Wilt of brinjal
D:-Quick wilt in pepper
Correct Answer:- Option-B
Question64:-Light sensitive proteinacious pigment in plant involved in photomorphogenesis is
A:-Cytochrome
B:-Chlorophyll
C:-Phytohormone
D:-Phytochrome
Correct Answer:- Option-D
Question65:-Flowering plants are included under the group
A:-Phanerogams
-Cryptogams
C:-Bryophytes
D:-Lichens
Correct Answer:- Option-A
Question66:-Water and minerals are principally transported in angiosperms through
A:-Xylem parenchyma
B:-Xylem tracheids
C:-Xylem vessels
D:-Xylem fibres
Correct Answer:- Option-C
Question67:-Growth movement of plants in response to gravity is called
A:-Phototropism
B:-Hydrotropism