Std-10 Most Imp Ch 1 Gseb L-15 રસાયણિક પ્રક્રિયાઑ અને સમીકરણ

Sunita from std. X uses spectacles . Her spectacle number is -1.5 D . Find the focal length of the lens.

Sunita from std. X uses spectacles . Her spectacle number is -1.5 D . What type of lens is she using ?

Sunita from std. X uses spectacles . Her spectacle number is -1.5 D . Name the defect of eye from which she is suffering .

The density of a gas at 1.5 atm is 1.52 g L^(-1) . Calculate the rms speed of the molecules of the gas.

A gas occupies a volume of 2.5 L at 9xx10^(5)Nm^(-2) . Calculate the additional pressure required to decrease the volume of the gas to 1.5 L , Keeping temperature constant.

Most herbaceous plant have only about 10 to 15 percent of its fresh weight as dry matter .

You are given three lenses L_(1),L_(2) and L_(3) each of focal length 10 cm. An object is kept at 15 cm in front of L_(1), as shown. The final real image is formed at the focus 'T' of L_(3). Find the separations between L_(1),L_(2) and L_(3).

If 1.0 kcal of heat is added to 1.2 L of O_(2) in a cyclinder of constant pressure of 1 atm , the volume increase to 1.5 L . Calculate DeltaU and DeltaH of the process.

The K_(sp) of AgCI at 25^(@)C is 1.5 xx 10^(-10) . Find the solubility (in g^(-1)L^(-1)) in an aqueous solution containing 0.01M AgNO_(3) .