Choose and write the correct option.
(i) The halogen which is liquid at room temperature is ..................
a) fluorine
b) astetine
c) bromine
d) iodine
(ii) Which of the following process to be carried out to avoid the formation of greenish layer on brass vessels due to corrosion?
a) plating
b) anodization
c) tinning
d) alloying
(iii) What type of reaction is shown below?
CH4 +CI2
CH3 - CI +CHI
a) Addition
b) Substitution
c) Decomposition
d) Reduction
(iv) The temperature of ice can be decreased below 00 C by mixing ............. in it.
a) saw dust
b) sand
c) salt
d) coal
(v) The image obtained while finding the focal length of convex lens is ....................
a) a real and *****.
b) virtual and *****.
c) real and inverted.
d) virtual and inverted.
