std 7 sanskrut ch 7

{:("Column I",,"Column II"),((A) CH_(3)COONa,,(i) "Almost neutral"pH gt 7 "or "lt7),((B) NH_(4)CI,,(ii) "Acidic"pHlt7),((C)NaNO_(3) ,,(iii)"Alkaline "pH gt 7),((D) CH_(3)COONH_(4),,(iv)"Neutral "pH =7):}

Observe the following patterns and fill in the blanks to make the statements true: 7xx4=28 7xx3 = _____=28-7 7xx2 =_____ =_____-7 7xx1 = 7=____-7 7xx0= ____= ______ -______ 7xx-1= -7= ______-______ 7xx-2= ______= ______-______ 7xx-3= ______= ______-______

List two most common STDs.

STD stands for

What is STD? Write the preventive measures of STDs

(a) Expand STDS (b) Cite any two examples for STDs. (c) Suggest any two methods for the prevention of STDs.

What do you mean by "STD" ? Give some measures of STD prevention.

What are STDs? Name two STDs. How can they be prevented?

An unsaturated fatty acid on ozonolysis yields one aldehyde H_(3)C(CH_(2))_(7)CHO and an aldehyde monocarboxylic acid OHC(CH_(2))_(7)COOH . Write down the structure and name of the acid.