Which of the following are essential to conduct the experiment to prove that heat is liberated during respiration ?
(i)Flask , (ii)Thermometer , (iii) Cork , (iv)Sprouting seeds , (v)Lime water , (vi)Dry seeds.

Explain the procedure you have adopted in your school to prove that heat is liberated during respiration. What result we will get, if you perform this experiment with dry seeds.

Which of the following sinks in water? i) Stone ii)Paper iii)Tomato iv)Egg

Why do we conduct bell jar experiment with sprouted seeds and lime water beaker ?

Be and Al exhibit diagonal relationship. Which of the following statements about then is//are not true ? (i) Both react with HCl to liberate H_(2) (ii) They are made passive by HNO_(3) (iii) Their carbides gives acetylene on treatment with water (iv) Their oxides are amphoteric

Which of the following practice is suitable to farmer with less water resources (i) select short term crops, (ii) cultivate comercial crops, (iii) adapt drip system, (iv) crop holiday

Which of the following are perfect cubes ? (i) 243 (ii) 400 (iii) 500 (iv) 512 (v) 729

Check which of the following are solutions of an equation x + 2y = 4? (Complete the table wherever necessary) (i) (0, 2) (ii) (2, 0) (iii) (4, 0) (iv) ( sqrt2 ,- sqrt2 ) (v) (1, 1) (vi) ( - 2, 3)

Which of the following are reasons for population explosion? i) Increased health facilities ii) Rapid increase in MMR iii) Rapid increase in IMR iv) Rapid decrease in IMR v) Decrease in number of people reaching reproducable age

Which of the following is not true about sewage(i) Sewage is more in rural areas(ii) Sewage water is useful for crop plants (iii) Nitrates are one of the impurities of sewage(iv) Draining out sewage water is good method for cleaning the area