PHYSICS

Ques:- An object is placed at principal focus,so that the image formed by a convex lens is real,very large and inverted. Than position of image is :

Ans;- At infinity

Ques:- The splitting of white light into different colours is called :

Ans:- Dispersion

Ques:- The human eye can focus objects at different distances by adjusting the focal length of the eye lens. This is due to :

Ans:- Accommodation

Ques:-For which disease of eye we use the convex lens ?

Ans:- Hypermetropia

Ques;- The sun is visible to us about two minutes after the actual sunset. This is because of :

Ans:- Atmospheric refraction

Ques:- Which colour of white light deviates the most on passing through a prism ?

Ans:- Violet

Ques:- The sky appears blue because of :

Ans:- Scattering of light

Ques:- A spherical mirror and a thin spherical lens have each a focal length of 20 cm. The mirror and lens are likely to be :

Ans:- Both concave

Ques:- Which mirror is used as a shaving mirror ?

Ans:- Concave

Ques:- The relation between focal length f and the radius of curvature R is :

Ans:- R= 2f

Ques:- The image formed by a convex mirror is observed to be virtual, erect and highly diminished than the object. Where should be the position of the object ?

Ans:- Between infinity and pole of the mirror

Ques:- The Snell’s law of refraction is :

Ans:- Sin i/Sin r =constant

Ques:- Which of the following material medium is having highest absolute refractive index ?

Ans:- Glass

Ques:- The power of a lens is measured in :

Ans:- Dioptre

Ques:-The least distance of distinct vision for a young adult with normal vision is :

Ans:- 25 cm

Ques:- A concave lens has focal length of 15 cm. At what distance should the object from the lens be placed so that it forms an image at 10 cm from the lens ?

Ans:- 30 cm

Ques:- In headlights of vehicles which mirror is used :

Ans:- Concave

Ques:- Mirror formula is :

Ans:- 1/v-1/u=1/f

Ques:- The change in focal length of an eye lens is caused by the action of the :

Ans:- Ciliary muscles

Ques:- A current of 0.5 A is drawn by a filament of an electric bulb for 20 minutes. The amount of electric change that flows through the electric circuit is :

Ans:- 600

Ques:- Which of the following remains same when resistances are joined in parallel ?

Ans:- Potential difference

Ques:- What current is drawn by an electric bulb of 60w, when it is connected to a source of 220 V?

Ans:- 3/11 A

Ques:- If the temperature of a conductor is increased. than its resistance :

Ans:- Increase

Ques:- How much does the resistance become if the diameter of wire is doubled ?

Ans:- R/4

Ques:- The commercial unit of electric energy is :

Ans:- kWh

Ques:- Which among the following is the best conductor of electricity ?

Ans:- Silver

Ques:- The instrument used for measuring electric current is :

Ans:- Ammeter

Ques:- The unit of resistivity is :

Ans:- ohm metre

Ques:- The work done in moving a unit positive charge across two points in an electric circuit is a measure of :

Ans:- Potential difference

Ques:- At the time of short circuit, the current in the circuit :

Ans:- Increase heavily

Ques:- The magnetic field lines due to a straight write carrying current are :

Ans:- Circular

Ques:- The direction of induced current is given by which rule ?

Ans:- Fleming’s right hand rule

Ques:- In electric motor is a device which converts :

Ans:- Electrical energy into mechanical energy

Ques:- In domestic electric circuits the colour of live wire is :

Ans:- Red

Ques:- The device used for producing electric current is called :

Ans:- Generator

Ques:- Electromagnetic induction was discovered by :

Ques:- Working of an electric generator is based on the principle of :

Ans;- Electromagnetic induction

Ques:- Which of the following describes the common domestic a.c. electric power supplied in india ?

Ans:- 220 V, 50 Hz

Ques:- In India, the potential difference between live and neutral wires of domestic electric circuit is :

Ans:- 220 V

Ques:- The main constituent of bio-gas is :

Ans:- Methane

Ques:- Ozone layer shields the surface of earth from which radiations from the sun ?

Ques:- Which of the following constitute a food chain ?

Ans:- Grass, Goat and Human

Ques:- When was Ganga Action Plan  came about ?

Ans:- 1985

Ques:- Coal consists of atoms of :

Ans;- Carbon and oxygen

CHEMISTRY

Ques:- AI atom has 13 protons, 13 electrons and 14 neutrons. What is its atomic mass ?

Ans:- 13

Ques:- Electronic configuration of Fe is :

Ans:- 2, 8, 14, 2,

Ques:- Last electron in Ca atom revolves in which orbit ?

Ans:- 4

Ques:- Which among the following is oxidised in the given equation :

Zn + H2SO4 – ZnSO4 H2

Ans:- Zn

Ques:- Which of the following will undergo corrosion most easily ?

Ans:- Zn

Ques:- The substance which cannot turn blue litmus red is :

Ans:- NaCL

Ques:- Which of the following metals given hydrated salts ?

Ans:- Li

Ques:- The metal which is usually obtained by electrolytic refining method is :

Ans:- Cu

Ques:- Which of the following is most reactive non- metal ?

Ans;- F2

Ques:- Out of copper, gold, iron and nickel which one shows maximum ductility ?

Ans:- Gold

Ques:- Which out of (1) Ethyl alcohol, (2) Acetaldehyde and (3) Propanal, belong to same homologous series ?

Ans:- 2, 3

Ques:- Which is not unsaturated substance ?

Ans:- Propane

Ques:- Which test can be used to distinguish between ethanol and ethanoic acid ?

Ans:- Litmus test, Ester test, NaHCO3

Ques:- IUPAC NAME OF CH3(CH2)3COOH is :

Ans:- Pentanoic acid

Ques:- Which is Dobernier’s triad ?

Ans:- Ca, K, Ba

Ques:- Which out of B, Cu, Zn and C belongs to 13th group of periodic table ?

Ans:- B

Ques:- Which exists in liquid state at normal temperature ?

Ans;- Br2

Ques:- Number of covalent bonds in ethyl alcohol with molecular formula C2H5OH is :

Ans:- 8

ENGLISH

Ques:- Change the voice :I see a dark cloud.

Ans:- A dark cloud is seen by me.

Ques:- Supply the proper from of the adjective :

He is the………..friend I have.

Ans:- Best

Ques:- Fill in the blank with an appropriate conjunction :

Water……………….oil will not mix.

Ans:- And

Ques:- Choose the correct modal :

Ans:- Could

Ques:- Fill in the correct article :

I first met him……………….year ago.

a, an, the

Ans:- None of the above

Ques:- Fill in the correct proposition :

Do not cry…………………spilt milk.

Ans:- Over

Ques:- Supply a verb in sentence which is in agreement with the subject :

To take pay and not to work……………..dishonest.

Ans:- Is

Ques:- Fill in the correct from of the verb.

He……………..asleep while he was driving.

Ans:- Fall

Ques:- Fill in the correct from of the verb :

It……………..raining since early morning.

Ans:- Has been

Ques:- Fill in the correct from of the verb :

I……………into town later on. Do you want a lite ?

Ans:- Will be driving

Ques:- Change the voice :

My pocket has been picked.

Ans:- Someone has picked my pocket.

Ques:- Change the degree of comparison without changing the meaning :

Australia is the largest island in the world.

Ans:- In the world Australia is a large island.

Ques:- Fill in the correct modal :

I don’t think I…………..be able to go.

Ans:- Shall

Ques:- Fill in the correct proposition.

Ans:- For

Ques:- Fill in the correct determiner :

Ans:- Any

Ques:- Rearrange the words and phrases to from a meaningful sentence :

are different from / in the classroom / life problems / students face / the ones.

Ans:- Life problems are different from the once students face in the classroom.

MATHEMATICS

Ques:- Using Euclid’s division algorithm H.C.F of 100 and 135 is :

Ans:- 5

Ques:- The prime factors of 775 are :

Ans:- 5, 31

Ques:- The number of the solutions of linear equation x+y=1 and 5x+5y=5 are :

Ans:- Infinitely solutions

Ques:- A quadratic polynomial may not have :

Ans:- There real zeroes

Ques:- 15th term of the A.P. -6, -3, 0, 3………………?

Ans:-36

Ques:-Which term of the A.P. 21, 18, 15,………………..IS -18 ?

Ans:- 35

Ques:- If the number (n-2), (4n-1) and (5n+2) are in A.P., then the value of n is :

Ans:- 1

Ques:- The sum of 10 + 20 + 30 + 40 + …………………. + 1000 is :

Ans:- 50500

Ques:- In an A.P. -5, -1, 3, 7, ………… common difference is :

Ans:- 4

Ques:- A relation between x and y such that the point (x, y) is equidistant from the points (7, 1) and (3, 5).

Ans:- x – y = 2

Ques:- The area of triangle whose vertices is (1, -1), (-4, 6) and (-3, -5) is :

Ans:- 24 sq. units

Ques:- Distance between two points A(2, 3) and B(4, 1) IS :

Ans:- 2 under root two

Ques:- The line joining the points (4, -5) and (4, 5) is divided by the point P such that AP/AB=2/5,. tHE co-ordinate of P is :

Ans:- (4, -1)

Ques:- Radii of two circles are 19 cm and 9 cm respectively. The radius of that circle whose circumference is equal to the suim of circumferences of given circles is :

Ans;- 28 cm

Ques:- The ratio of the surface area of the two spheres is 9 : 4. Find the ratio of their volumes :

Ans:- 27 : 8

Ques:- A cone of height 24 cm and base radius 6 cm is melted. A child is recast it in the shape of a sphere. than find the radius of the sphere :

Ans:- 6 cm

Ques:- The mean of the first six prime numbers is :

Ans:- 6.83

Ques:- Find the median of the following :

5, 7, 10, 3, 8, 14, 17, 23

Ans:- 9

Ques:- The following data given gives the distribution of total household expenditure of manual workers in a city :

Expenditure (in Rs.)               Frequerncy

1000– -1500                       24

1500 – 2000                       40

2000 -2500                       33

2500 -3000                        28

3000 -3500                        30

3500 -4000                        22

4000 -4500                        16

4500 -5000                        7

Find the average expenditure which is being done by the maximum number of manual workers :

Ans:- 1847.826

Ques:- Mean of 15 children’s height is 155 cm. If height of each child is increased by 2 cm, new mean will be :

Ans:- 157

Ques:- A card is drawn at random from a well shuffled deck of 52 cards. The probability of getting a king is :

Ans:- 1/13

Ques:- A card is drawn at random from a well shuffled deck of 52 cards. The probability of getting a king of red suit is :

Ans:- 1/26

Ques:- February has only 28 days.

Ans:- Ambiguous

Ques:- The probability of throwing a sum 11 with two dice is :

Ans:- 1/18

Ques:- Ram and Anil are two friends.What is the probability when both have different birthdays ?

Ans:- 364/365