Chemical effects of electric current is used in a most common industrial application known as
D none of these.
Explain why not electrolysis
Following sets of test tubes were made by a class VII science teacher.
She asked the students to find the incorrect statements about the given experimental set-ups.
ABlue litmus solution turns red in test tubes 1 and 3.
BTurmeric solution turns red in test tube 1.
CChina rose indicator turns dark pink in test tubes 2 and 4.
DPhenolphthalein remains colourless in test tubes 2 and 4.
Study the flowchart carefully.
(i) Bursting of crackers
(iii) Melting of ice
(iv) Increase in height
AFast change - Fast change
BSlow change - Fast change
CFast change - Slow change
DSlow change - Slow change
have doubt please explain
You are busy eating your food when a spoonful of curry falls on your white shirt. You decide to go home and wash it. The moment you dip the shirt in soap water the stain ………….
DDid not show any change
have a doubt
Pari studied that an organism ‘A’ depends on an organism ‘B’ for certain food requirement even though it is autotrophic. In this case the organism A is supposed to be a
Read the following statements and mark the correct statement.
A Solar energy, wind energy and biomass are non-renewable sources of energy.
B Manufacturing goods in factories uses up huge amount of energy.
C We use much less energy at home today as compared to earlier days.
D Petroleum is a fossil fuel formed over three hundred years.
An echo will be heard clearly if the distance of the observer from the reflecting wall is
A 5 m
B 10 m
C 15 m
D 17 m
48 is a common multiple of number X and number Y. The number X is 3 times of the number Y. The sum of digits X is 6. Total number of factors of the number X is _____.