(English Medium) ICSE Class 10 - CISCE Question Bank Solutions

How will climate changes affect the various animal species?

What impact will climate changes have on the crops of food?

How will global warming disturb the ecological balance?

State three ways to minimize the global warming.

What is carbon tax?

Who shall pay carbon tax ?

Without green house effect, the average temperature of earth’s surface would have been:

(a) – 18℃

(b) 33℃

(c) 0℃

(d) 15℃

The global warming has resulted:
(a) the increase in yield of crops
(b) the decrease in sea levels
(c) the decrease in human deaths
(d) the increase in sea levels

(i) State whether the specific heat capacity of a substance remains the same when its state changes from  solid to liquid. 
(ii) Give one example to support your answer.

104g of water at 30°C is taken in a calorimeter made of copper of mass 42 g. When a certain mass of ice at 0°C is added to it, the final steady temperature of the mixture after the ice has melted, was found to be 10°C. Find the mass of ice added. [Specific heat capacity of water = 4.2 Jg^–1°C^–1 ; Specific latent heat of fusion of ice = 336 J^g–1; Specific heat capacity of copper = 0.4 Jg^–1°C^–1] .

Name the type of transformer shown in fig . What changes will you observe regarding the brightness of the lamp, if
(a) The no. of turns in the secondary is doubled?
(b) The part X of the transformer is removed?
( c) The core of the transformer is made out of copper?
(d ) The A.C. supply is replaced by D.C.?

Fill in the blanks by writing (i) Only soft iron, (ii) Only steel, (iii) Both soft-iron and steel for the material of core and/or magnet.

 Electric bell ______.

Fill in the blanks by writing (i) Only soft iron, (ii) Only steel, (iii) Both soft-iron and steel for the material of core and/or magnet.

 Electromagnet ______.