User Forum

Solve the given crossword and select the option which is not given in it.


A Easiest method to purify water at home.
B Gas given out by plants during photosynthesis.
C Major component of air.
D Insoluble impurities can be separated by this method.

An object is placed at the centre of curvature C of a concave mirror, the image will be formed at

A Focus
B Infinity
C Between C and F
D Centre of curvature C.

Four different-sized beakers are filled with water up to the same height. The temperature of the water is same in all four beakers. If we put 100 gram of ice in each beaker, what effect will occur?


A The temperature of water in beaker 2 will change the most.
B The ice will melt fastest in the beaker 3.
C The temperature changes will be same in all four beakers.
D The temperature of the water in beaker 3 will change the most.

Refer to the given puzzle.

Four components of food are hidden in the given puzzle. Solve the puzzle and select the option which is not hidden in the puzzle.

AIt builds our body and helps in growth.
BIt is an energy giving nutrient that gives more energy than carbohydrate.
CIt helps the body to get rid of undigested food.
DIt keeps our body fit and helps to resist diseases.

Which of the following statements are correct?
(i) The glass sheet in a solar cooker is responsible for green house effect.
(ii) Acid rain happens because earth’s atmosphere contains acids.
(iii) Biomass is a renewable source of energy.
(iv) Non-conventional sources of energy are nuclear, solar, biomass etc.
(v) Sun can be taken as inexhaustible source of energy.

A(i) and (iv) only
B (ii) and (iii) only
C (iii), (iv) and (v) only
D (i), (iii) and (v) only

Read the given statements carefully and select the correct option.
Statement 1 : When an ant bites, it injects formic acid into the skin.
Statement 2 : The effect of the acid can be neutralised by rubbing moist baking soda.

ABoth statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
BBoth statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
CStatement 1 is true but statement 2 is false.
DBoth statements 1 and 2 are false.

The given figure shows the distillation of an aqueous solution of sodium chloride :

What is the temperature shown by the thermometer and what is left in the distillation flask?

--------
A< 100 ------------------ White residue
B85 ---------------------- No residue
C100 --------------------- No residue
D> 100 ------------------ White residue

Refer the given figure showing changes in a flag’s shadow during the day.

Shadows P, Q and R represent different times of the day. At what time, would Preeti most likely to have (i) Breakfast and (ii) Evening snacks, respectively?

A(i) - R, (ii) - Q
B(i) - P, (ii) - Q
C(i) - R, (ii) - P
D(i) - P, (ii) - R

Vinod made use of the given flowchart to find out whether a steel rod (object) works like a magnet, or is magnetic or non-magnetic material. The points J, E, F, G and H are called 'exit points'. Which 'exit point' would Vinod get for the steel rod?

(A) E

(B) F

(C) G