Question

1)The angle of incidence for a ray of light having zero reflection angle is
(a) 0 (b) 30* (c) 45° (d) 90'
2)Ethane, with the molecular formula C2H6 has
(a) 6 covalent bonds. (b) 7 covalent bonds. (c) 8 covalent bonds. (d) 9 cova
3)The star appear shifted from their actual position due to the phenomeno
(a) Diffraction of light (b) Scattering of light (c) Refraction of light (d) Refle
4)in which of the following, the image of an object placed at infinity will be
and point sized?
(a) Concave mirror only (b) Convex mirror only
(c) Convex leris only (d) Concave mirror, convex mirror, concave lens and
5)How many water molecules does hydrated cal-cium sulphate contain?
(a) 5 (b) 10 (c) 7 (d) 2
6)Which of the following is not a digestive enzyme contained in the pancreatic juic
i.Lipase li. Hydrochloric acid iii. Mucus iv. Trypsin
a.(I) and (ii) b.(i) and (iv) c. (li) and (in) d. (ii) and (iv)
7)The excretory unit of the human excretory system is known as:
a)Nephridia b)Neuron c)Nephron d)kidneys
8)Reduction of blood pH will
a)reduces the rate of heartbeat b)reduces the blood supply to the brain
c)releases bicarbonate ions by the liver d)decrease the affinity of haemog
9) Which of the following is not observed in a homologous series? Give rea​

Answer 1

Answer:

Q1. (a) 0

Q3. (c) refraction of light

Q4. (a) concave mirror only

Q7. (c) nephron

Explanation:

I only know this much. This is all i can help you with. Hope it helps.