Question

que 1: which type of mirror produced magnification always +1

1. concave mirror
2. convex mirror
3. plane mirror
4. concave and plane mirror both

que 2: A student uses a lens of focal length-10cm. what is the power of the lens?
1. 0.1D
2. -0.!D
3. 10D
4. -10D


que 3: which acid is present in bee string

1. HCOOH
2. CH3COOH
3. HCl
4. None

que 4: CH3COOH is a:-
1. Monobasic acid
2. Di basic acid
3. Tri basic acid
4. None

que 5: which gas will release when lead nitrate is heated:-
1. NO1O2
2. N2O1O2
3. NO2O2
4. None​

Answer 1

Answer:

(1) convex (2) -10D iiijkoooooooo

Answer 2

Answer:

It is Double Displacement reaction......

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