Without glass sheet cover, the time taken to reach a temperature of `100-140^@C` in a box type solar cooker will be 7-8 hours. Is this statement correct?

The temperature range of box type solar cooker kept in the sun for 2-3 hours will be……..

What is the range of temperature which can be attained in a box type solar cooker in two to three hours exposure to sun?

ASSERTION TYPE QUESTIONS : These questions consist of two statements each, printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses. A. If both Assertion and Reason are true and Reason is correct explanation of Assertion. B. If both Assertion and Reason are true but Reason is not correct explanation of Assertion. C. If Assertion is true but Reason is false. D. If both Assertion and Reason are false. .Assertion : 7-celled, 8- nucleate and monosporic embryo sac is called Polygonum type of embryo sac. Reason : It was discovered by Hofmeister for the first time in Polygonum.

Select the correct statement(s) : a) On bombarding ._(7)^(14)N nuclei with alpha -particle, the nuclei of the product formed after release of proton would be ._(8)^(17)O b) Decay constant does not depend upon temperature c) Nuclide and its decay product after alpha -emission are called isodiaphers d) Half-life of radium is 1580 years . Its average life will be 1097.22 years

Select the correct statement(s) : a) SI unit of radioactivity is becquerel (Bq) b) 1 Ci =3.7 xx10^(7) Bq c) ._(3)^(7)Li +_(1)^(1)H rarr _(2)^(4)He "is" (P, alpha) type reaction d) The half -time of a particular radioactive isotope is a characteristics constant of that isotope