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WorksheetsGrand test 1 by bsk
Total questions: 20
Worksheet time: 13mins
Find the focal length of a spherical mirror when the radius of curvature is 20 cm
10 cm
20 cm
30 cm
40 cm
This figure shows that
1) Mirror is convex
2) Mirror is concave
3) It forms virtual image
4) It forms real image
1 and 2 correct
1 and 3 correct
2 and 3 correct
2 and 4 correct
What is the mirror formula ?
1/f = 1/v + 1/u
1/f = 1/u -1/v
1/u = 1/f + 1/v
1/f = u + v
An object 8cm in length is placed at a distance of 40cm in front of a concave mirror of radius of curvature 30cm.Find the position of the image and its size
v = -24cm, h = -4.8cm
v = 24cm , h = 4.8cm
v = -32cm , h = -5.2cm
v - 32cm , h = 5.2cm
An object is placed at the centre of curvature of a concave mirror.The distance between the object and its image is
Equal to f
Equal to 2f
Zero
Equal to 4f
Zn + H2SO4 --------> ZnSO4 + H2
Above reaction is -
decomposition reaction
single displacement reaction
combination reaction
synthesis reaction
It is necessary to balance a chemical equation in order to satisfy the law of:
Conservation of motion
Conservation of momentum
Conservation of energy
Conservation of mass
7.The equation
Cu + xHNO3 -> Cu(NO3)2 + yNO2 + 2H2O
The values of x and y are
3 and 5
8 and 6
4 and 2
7 and 1
Colour of methyl orange indicator in acidic medium is......
yellow
green
orange
red
A solution turns red litmus blue, its PH is likely to be
1
4
5
10
Which of the following types of medicines is used for treating indigestion?
antibiotic
analgesic
antacid
antiseptic
Common name of CaSO4 2H2O is......
Epsom Salt
Blue vitrol
Gypsum
Plaster of Paris
An example of an acidic oxide is:
MgO
CO2
BaO
Na2O
Which one of the following will turn blue litmus red?
Vinegar
Lime water
Baking soda solution
Washing soda solution
Jatin puts a pencil into a glass container having water and is surprised to see the pencil bend.Name the phenomenon responsible for the change.
Reflection of light
Refraction of light
total internal reflection of light
partial reflection and partial refraction
Which of the following is Snell's law?
n1 sin i = sin r / n2
n1/n2 = sin r / sin i
n2/n1 = sin r / sin i
n2 sin i = constant
Speed of light in vacuum is ______ m/s
2 x 10 8
3 x 10 8
3 x 10 10
2 x 10 10
