Question

1. Corrosion of metal in volves -
a) Physical reaction
.) Both (a) and (b)
b) Chemical reaction
d) None of these
2. Which is largest amongst 5/8, 2/3, 7/9, 3/5?
a) 5/8
b) 2/3
c) 7/9
d) 3/5
3. Surface area of wooden table top of diameter 1.4 m is -
a) 1.54 m²
b)3.08m
c) 7.7m2
d)10.78m2
4. What is the curved surface area (C.S.A) for frustum of con
smaller dia 6 mm and slant height 14 cm?
a) 392.64 cm
b) 395.64 cm?
c) 397.64 cm?
d) 399.64 cm?​

Answer 1

Answer:

1.>both a and b

2.>b

3.>c

4.>d

Answer 2

Answer:

1) b bcoz a new substanve is formed which can't be reversed

2) c