Q. Who gave principle of electromagnetic induction?

1. Faraday
2. Oersted
3. Ampere
4. Volta

Q. Which of the following is not a characteristic of light ?

1. Light travels with $3\times {10}^{8}m{s}^{-1}$ speed in vacuum.
2. Light is an electromagnetic radiation which produces sensation in our eye
3. Light travels on a straight path
4. Light is a mechanical wave

Q. Which of the following formula is wrong in accordance with Snell's law ?

1. $\frac{n_1}{\sin i}=\frac{n_2}{\sin r}$
2. $\frac{n_2}{n_1}=\frac{\sin i}{\sin r}$
3. $n_1\sin i=n_2\sin r$
4. $\frac{1}{n_2}\sin i=\frac{1}{n_1}\sin r$

Q. When sunlight enters into an atmosphere, it gets refracted. Because of this atmospheric refraction, virtual image of sun is formed during sunset and sunrise as shown in above diagram.
Due to this atmospheric refraction, the day __________

1. becomes four minutes longer than the actual one.
2. becomes four minutes shorter than the actual one.
3. becomes longer in summer and shorter in winter.
4. length of the day can not be said anything.

Q. In modern communication, use of optical fiber is increased for sending information. The reason behind this being, the speed of light is more than the speed of electron. Optical fiber used in communication systems works on which principle ?

1. Reflection
2. Dispersion
3. Scattering
4. Total internal reflection

Q. If an electric bulb connected to $220V$ line draws an electric current of $0.5A$, then what will be the resistance of filament of a bulb ?

1. $220\Omega$
2. $22\Omega$
3. $440\Omega$
4. $44\Omega$

Q. What is the reason for short circuit from the following ?

1. Positive and negative wire connected accidently.
2. Insulating layer of wire gets damaged
3. The appliance becomes defective
4. All of them

Q. With the help of which law the direction of induction electric current in the circuit can be determined ?

1. Fleming's left hand rule
2. Fleming's right hand rule
3. Right hand thumb rule
4. Faraday's law

Q. Make the correct pair from below
Artificial satellite Function
$\left(1\right)$ INSAT $\left(P\right)$ Geographical survey
$\left(2\right)$ METSAT $\left(Q\right)$ DTH transmission
$\left(3\right)$ CARTOSAT $\left(R\right)$ Weather forecasting

1. $(1\leftrightarrow P),(2\leftrightarrow R),(3\leftrightarrow Q)$
2. $(1\leftrightarrow R),(2\leftrightarrow P),(3\leftrightarrow Q)$
3. $(1\leftrightarrow Q),(2\leftrightarrow R),(3\leftrightarrow P)$
4. $(1\leftrightarrow P),(2\leftrightarrow Q),(3\leftrightarrow R)$

Q. Which statement is incorrect in reference to Galaxy from the following ?

1. A big cluster of star is known as galaxy
2. There are three types of galaxies
   $1)$ Spiral
   $2)$ elliptical
   $3)$ irregular
3. There are about ${10}^{11}$ stars in each galaxy
4. Most of the stars are bluish in elliptical galaxy

Q. By which poles of Mars are covered?

1. Dry ice
2. Water ice
3. Nitrogen
4. Iron

Q. Metal oxide + water $\to$ ?

1. Acid
2. Base
3. Salt
4. None of these

Q. $H_{2}S{O}_{4\left(\text{aq}\right)}+2NaO{H}_{\left(\text{aq}\right)}\to P+2H_2{O}_{\left(l\right)}$
The substance $P$ is _________.

1. $NaS{O}_{4\left(l\right)}$
2. $N{a}_{2}S{O}_{4\left(\text{aq}\right)}$
3. $N{a}_{2}S{O}_{4\left(\text{s}\right)}$
4. $NaS{O}_{4\left(\text{aq}\right)}$

Q. The table shows pH value of some foods

Vegetables	pH	Citrus fruits	pH	dairy/ Egg products	pH	starches	pH
Beans	$5.5$	Lemons	$2.3$	Cheese	$5.6$	Corn	$6.2$
Peas	$6.1$	Limes	$1.9$	Eggs	$7.8$	Bread (White)	$5.5$
Spinach	$5.4$	Oranges	$3.5$	Milk	$6.5$	Potatoes	$5.8$

A patient has chronic indigestion due to an overproduction of stomach acid. Consumption of which food should she avoid most ?

1. Vegetables
2. Citrus fruits
3. Dairy / egg
4. Starches

Q. What is the chemical formula of cryolite ?

1. $NaAl{F}_6$
2. $N{a}_{3}Al{F}_6$
3. $N{a}_{2}Al{F}_6$
4. $NaAl{F}_4$

Q. The iron sheets used in the roof of the house are galvanized sheets. What is galvanized sheets ?

1. Iron sheets coated with very fine layer of zinc
2. Zinc sheets coated with very fine layer of iron
3. Iron sheets coated with very fine layer of Aluminium
4. Aluminium sheets coated with very fine layer of Iron.

Q. Which method is used for concentration of sulphide ores of metals ?

1. Magnetic separation
2. Froth flotation method
3. Centrifugation
4. Liquefaction

Q. Concentrated sulphuric acid is a mixture of _________.

1. $90\%$ water and $10\%H_{2}S{O}_4$
2. $98\%H_{2}S{O}_4$ and $2\%$ water
3. $90\%H_{2}S{O}_4$ and $10\%$ water
4. $2\%H_{2}S{O}_4$ and $98\%$ water

Q. Physical properties of one gas is given below. From these properties identify the gas.
(i) Colourless, odurless and tasteless gas
(ii) Gas is lighter than air
(iii) It is insoluble in water
(iv) It does not show any effect on wet blue or red litmus paper. It is a neutral gas.

1. Dinitrogen gas
2. Ammonia gas
3. Dihydrogen gas
4. Dioxygen gas

Q. The method that is used for direct extraction of sulphur from the core of the earth is called Frasch method. In this method, three concentric pipes are passed below the soil so that they touch the layer of the sulphur. Super heated water vapour is passed at $443K$ temperature in the soil of outermost cylinder. By which property of sulphur it melts ?

1. Low melting point
2. High melting point
3. High Boiling point
4. Low Boiling point

Q. Which type of structure the substance shown in the diagram posses ?

1. simple chain
2. branched chain
3. cyclic
4. sub branched chain

Q. Make the correct pair of below given data.

Carbonic compound	Molecular formula	No. of carbon
$\left(1\right)$ Methane	$\left(P\right)C_3{H}_8$	$\left(W\right)5$
$\left(2\right)$ Pentene	$\left(Q\right)C_4{H}_{10}$	$\left(X\right)3$
$\left(3\right)$ Propane	$\left(R\right)C{H}_4$	$\left(Y\right)4$
$\left(4\right)$ Butane	$\left(S\right)C_5{H}_{12}$	$\left(Z\right)1$

1. $(1\leftrightarrow R\leftrightarrow Z),(2\leftrightarrow S\leftrightarrow W),(3\leftrightarrow P\leftrightarrow X),(4\leftrightarrow Q\leftrightarrow Y)$
2. $(1\leftrightarrow P\leftrightarrow X),(2\leftrightarrow R\leftrightarrow Y),(3\leftrightarrow Q\leftrightarrow Z),(4\leftrightarrow S\leftrightarrow W)$
3. $(1\leftrightarrow Q\leftrightarrow Y),(2\leftrightarrow P\leftrightarrow X),(3\leftrightarrow R\leftrightarrow W),(4\leftrightarrow S\leftrightarrow Z)$
4. $(1\leftrightarrow S\leftrightarrow W),(2\leftrightarrow Q\leftrightarrow X),(3\leftrightarrow R\leftrightarrow Y),(4\leftrightarrow P\leftrightarrow Z)$

Q. To obtain the high octane number in gasoline, used in the motor, $1ml$ tetraethyl led is added to every $4$ litre of gasoline. Which substance is added into this so that lead may not deposit on spark plug when gasoline is combusted?

1. Diethylene trichloride
2. Triethylene dichloride
3. Diethylene tribromide
4. Diethylene dichloride

Q. Which coal is used in production of steel ?

1. Bituminous Coal
2. Peat
3. Lignite
4. Anthracite

Q. Suppose your neighbour Ramankaka has bad habit of drinking alcohol. And you know this is a bad habit which affect person's social, mental , economical and physical health. Now you take him to deaddiction centre with the help of your father. Which medicine will be prescribed by the doctor to him inorder to deaddict from alcohol ?

1. Paracetamol
2. PABA
3. Copper sulphate solution
4. Disulfiram

Q. Which functional group does $C{H}_{3}COC{H}_3$ contains ?

1. $-CHO$
2. $-\stackrel{\stackrel{\text{O}}{||}}{C}-$
3. $-COOH$
4. $-OH$

Q. Which of the following is used in conveyor belt ?

1. PVC
2. Polythene
3. Neoprene
4. Teflon

Q. The plant has an autotrophic nutrition system. In this organisms synthesize their own food, like carbohydrate, from water and $C{O}_2$ with help of chlorophyll in presence of sunlight. This process is known as photosynthesis. What is the correct sequence of reactions which takes place during the photosynthesis process?
$P:\to$ Absorption of light energy of chlorophyll
$Q:\to$ Conversion of light energy into chemical energy
$R:\to$ Reduction of $C{O}_2$ into carbohydrate

1. Only $P$
2. Only $P$ and $Q$
3. $P,Q,andR$
4. Only $R$

Q. Which is the correct path of lymphatic system in human body ?

1. Intercellular space $\to$ lymphatic capillaries $\to$ lymph vessels $\to$ large veins
2. Large veins $\to$ intercellular space $\to$ lymphatic capillaries
3. Lymphatic capillaries $\to$ lymph vessels $\to$ intercellular space $\to$ large veins
4. Intercellular space $\to$ large veins $\to$ lymphatic capillaries $\to$ lymph vessels

Q. Where is tricuspid valve found in human heart ?

1. Between two atria
2. Between right antrium and right ventricle
3. Between left atrium and left ventricle
4. Between two ventricles