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 :
Ans:- Faraday
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 ?
Ans;- Ultraviolet radiations
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 :
……………….you shut the door please.
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.
Only graduates are eligible………….the post.
Ans:- For
Ques:- Fill in the correct determiner :
We did not buy………………..flowers.
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