# Recent questions tagged q129

### Integrate : $\large\frac{1+ \cos 4x }{\cot x - \tan x }$$dx ### The fruit is chambered, developed from inferior, ovary and has seeds with succulent testa in : ### What is the volume of 0.1\: M \: H_2SO_4 required in litres to neutralize completely 1 litre of a solution containing 20 g of NaOH ? ### Which one of the following statement is not correct? ### What is the correct Fischer projection of (R) 2-hydroxy propanoic acid? ### When 25 grams of a non-volatile solute is dissolved in 100 grams of water, the vapour pressure is lowered by 2.25 \times 10^{-1}\;mm If the vapour pressure of water at 20^{\circ} is 17.5\;mm What is the molecular weight of the solute? ### The correct Fischer projection formula of (2R, 3R)-2, 3-dihydroxy butanoic acid is ### The chemical entities present in thermosphere of the atmosphere: ### X is a non-volatile solute and Y is a volatile solvent. The following vapour pressures are observed by dissolving X and Y : ### At T(k), the partial pressures of SO_2,O_2 and SO_3 are 0.662,0.100 and 0.331 atm. respectively for the reaction 2 S0_2+O_2 \to 2 SO_3 at equilibrium . What is the partial pressure in atm. of O_2 when the equilibrium partial pressures of SO_2 and SO_3 are equal at the same temperature? ### The vapour pressure in mm of Hg, of an aqueous solution obtained by adding 18 g of glucose (C_6H_{12}O_6) to 180\;g of water at 100^{\circ} is : ### X is a discrete random variable which takes the values 0, 1, 2 and P(X=0)=\large\frac{144}{169},$$ P(X=1)=\large\frac{1}{169}$ then the value of $P(X=2)$ is

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