Question

of sodium hydrox.
10
1. 36 x 105 Joules = ......... KWH.
A) 2
B) 3
c) 1
D) 0.5
2. Place a few granules of zinc metal in one test tube and add 10 ml of sodin
ide solution and warm the test tube. Then the evolved gas is
A) 07
B) Clut
C) CO,
D) H1
3. Sommerfeld added ............ elliptical orbits to Bohr's third orbit.
A) 1
B) 2
C) 3
4. At STP, 4 grams of hydrogen gas occupies
A) 22.41
B) 11.27
C) 6721
D) 44.81
5. Which one is a formula of butanal ?
A I - CH - CH - CHO
B) CH-CH - CH - CH - OH
C) CH - CH - CH - COOH
D) CH - C - CH - CH.
D) 4
rectif
6. Magnification of the image of the given object is
A) + 1
B) > +1
C) <+1
D -1
7. A person with myopia has the far point at 0.8 meters. The lens to be used to
his defect of vision is
A) Concave lens with 80 cm focal length
B) Convex lens with 80 cm focal length
C) Concave lens with 40 cm focal length
D) Convex lens with 40 cm focal length​

Answer 1

Answer:

this all my gusse

Explanation:

• 1 is B
• 2 is hydrogen
• 3 is added 1 to 2nd orbit,2 to 3rd orbit total

3 elliptical orbits he added

• 4 is I think A
• 5 is CH3-CH2-CH2-CH2-CHO
• 6 is if it is plane mirror it is +1

it is concave it is negitive

it is convex it is positive

• 7 is A