Q. A point object emits rays in all directions.
Consider one ray that the object emits which is parallel to the principal axis of a concave mirror as shown in the following figure. One of the points required to draw the reflected ray is the point of incidence itself which is labelled in the figure.
Select the point in the figure given here through which the reflected ray passes.

1. P
2. C
3. A
4. F

Q. Pavan sorts some materials into two different groups and notes down their properties.
They are listed in the following table:

Group - I	Group - II
Cannot be beaten into thin sheets.	Can be beaten into thin sheets.
When one end is in contact with a hot object, the other end does not become hot quickly.	When one end is in contact with a hot object, the other end becomes hot quickly.
Cannot be turned into thin wires.	Can be turned into thin wires.

1. Materials of group II can be used to make bells
2. Materials of group I are generally not shiny and hard
3. Materials of group I are generally less dense than materials of group II
4. Materials of group II can be used to make materials that are conductors of electricity

Q. Which alloy is used to prepare scientific balance?

1. Duralumin
2. Steel
3. Bronze
4. Magnelium

Q. Bi-focal lenses consist of both concave and convex lenses. Glasses using bi-focal lenses are needed by people who have_______
P. nearsightedness Q. farsightedness R. night blindness

1. Only P
2. Only Q
3. Both P and Q
4. Only R

Q. Which colour of light deviates the maximum in the dispersion of white light by the prism?

1. Red
2. Blue
3. Green
4. Violet

Q. What is the time difference between actual sunset and apparent sunset?

1. 20 seconds
2. 2 minutes
3. 20 minutes
4. 2 seconds

Q. Who was the scientist to propound proton transfer of acid-base theory?

1. Arrhenius
2. Bronsted Lowry
3. Robert Boyle
4. Rutherford

Q. Which of the following is a strong acid?

1. Sulphuric acid
2. Lactic acid
3. Tartaric acid
4. Acetic acid

Q. In which part of the body, the blood is purified (oxigenation) ?

1. Heart
2. Atrium
3. Lungs
4. Ventricle

Q. What is added to the alkaline soil to make it neutral by farmers?

1. Salt
2. Gypsum
3. Blue Vitriol
4. Lime

Q. Which of the following is a satellite of Neptune?

1. Titon
2. Phobos
3. Deimos
4. Triton

Q. Sonika is working with the circuit shown in the figure. The circuit has two gaps X and Y. She has wires of five different materials - I, II, III, IV and V. She knows that the bulb will light up only when both gaps are filled with conducting materials.
She records her observations in a table. After completing the experiment, ink fell on thepaper and she lost entries in row 3.

	Material in X	Material in Y	Bulb (On/Off)
1	I	II	Off
2	I	IV	On
3			Off
4	III	V	On

Based on the rest of the information in the table, what could be the materials in row 3?

1. II and III
2. I and III
3. III and IV
4. IV and V

Q. What is the diameter of a hydrogen atom in nm?

1. 1
2. 10
3. 0.01
4. 0.1

Q. What is the main principle involved in voltaic cell?

1. Conversion of chemical energy into heat energy
2. Conversion of heat energy into electrical energy
3. Conversion of chemical energy into electrical energy
4. Conversion of electrical energy into chemical energy

Q. What is used as a catalyst in manufacture of sulphuric acid by contact process?

1. $A{l}_2{O}_3$
2. $K_{2}O$
3. $V_2{O}_5$
4. $Fe$

Q. What is the least distance of distinct vision of a normal human eye?

1. 10 cm
2. 100 cm
3. 25 cm
4. 25 m

Q. Which instrument converts mechanical energy into electrical energy?

1. Electric motor
2. Electric oven
3. Electric generator
4. Electric iron

Q. By which of the following, bile is secreted in human digestive system?

1. Pancreas
2. Liver
3. Stomach
4. Kidney

Q. Which type of coal is used in thermal power stations?

1. Bitumen
2. Anthracite
3. Peat
4. Lignite

Q. Which of the following detects the presence of electrical energy?

1. Fuse
2. Battery
3. Voltmeter
4. Galvanometer

Q. Which of the following represents Ohm's Law?

1. I = $\frac{V}{R}$
2. I = Qt
3. I = VR
4. I = $\frac{R}{V}$

Q. Which of the following are members of Solar system?

1. Asteroids
2. Shooting star
3. Sun
4. Artificial satellite

Q. Which of the following functional groups constitutes the formation of detergent?

1. $COONa$
2. $COOH$
3. $OH$
4. $S{O}_{3}Na$

Q. Which of the following is not a fossil fuel?

1. Mineral coal
2. Wood
3. Petroleum
4. Natural gas

Q. From the listed electrical devices, which of these release heat energy that is not appreciated?

1. Oven
2. Electric heater
3. Water heater
4. Electric motor

Q. What are the components of water gas?

1. Carbon dioxide and Hydrogen
2. Carbon and Hydrogen
3. Carbon monoxide and Hydrogen
4. Ammonia and Hydrogen

Q. Find the focal length of a convex lens, if its power is +2.0 D.

1. 0.5 m
2. -0.5 m
3. 1 m
4. -1 m

Q. Which by-product gas is released when an acid reacts with metal?

1. Dinitrogen
2. Dioxygen
3. Dichlorine
4. Dihydrogen

Q. Which of the following is the formula of the iron ore 'Haematite'?

1. $F{e}_2{O}_3$
2. $F{e}_C{O}_3$
3. $Fe{S}_2$
4. $F{e}_3{O}_4$

Q. Which of the following is used in the preparation of vinegar?

1. Ethanol
2. Methanal
3. Acetic acid
4. Propanone