Question

(B) green
(A) yellow
(C) orange (D) red
4. Identify the pair of the pH values of strong acid and strong base in the
following
(A) (6, 14) (B) (1,8)
(C) (7.7) (D) (2, 14)
5. A: All acids react with metals and release H gas.
B: Some bases react with metals and release H gas.
(A) A and B are correct
(B) A is correct, B is incorrect
(C) A is incorrect, B is correct
6. Observe the given figure and identify the gas
evolved in the test tube marked as (?).
7. Match the following:
(a) Speed of light in vacuum
(b) Refractive index of water
[ (ii) 3x10 m/s
(ii)
sinc
(iv) 1.33
8. Can you guess what happens when light ray travels from a denser medium
to a rarer medium?
9. What is the distance between centre of curvature and curved surface of a
lens called ?
AXRED1​

Answer 1

Answer:

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