Std-10 Most Imp Ch 2 Gseb L-8 જૈવિક ક્રિયાઓ

In a Std. X class, out of 40 students, 10 students use spectacles, 2 students have positive power and 8 students have negative power and 8 students have negative power of lenses in their spectacles . Generally which type of spectacles do most of the students use ?

Which of the following should be most volatile? I) CH_3 CH_2 CH_2 NH_2 II) (CH_3)_3 N III) IV) CH_3 CH_2 CH_3

If 'L' stands for '+', 'M' stands for '-' N stands for 'xx' , P stands for '-:' then 14 N 10 L 42 P 2 M 8 = ?

CH_(3)CH_(2)l reacts more rapidly with strong base in comparison to CD_(3)CH_(2)l . Explain

Which of the following solutions when added to 1L of a 0.1 M CH_3COOH or in the pH of the solution K_a=1.8xx10^(-5) for CH_3COOH ?

Which of the most suitable reagent among the following to distinguish compound (III) from the rest of the compounds? (I) CH_2C-=C CH (II) CH_3CH_2CH_2CH_3 (III) CH_3CH_2C-=CH (IV) CH_3CH=CH_2