To synthesize 1.0 mole of 2-methylpropan-2-ol from Ethylethanoate ___________ equivalents of CH₃MgBr Reagent will be required. (Integer value)

The inactivation rate of a viral preparation is proportional to the amount of virus. In the first minute after preparation, 10% of the virus is inactivated. The rate constant for viral inactivation is ___________ $$\times$$ 10^$$-$$3 min^$$-$$1. (Nearest integer)

[Use : ln 10 = 2.303; log₁₀ 3 = 0.477; property
of logarithm : log x^y = y log x]

An average person needs about 10000 kJ energy per day. The amount of glucose (molar mass = 180.0 g mol^$$-$$1) needed to meet this energy requirement is ____________ g.

(Use : $$\Delta$$_CH(glucose) = $$-$$2700 kJ mol^$$-$$1)

At 20$$^\circ$$ C, the vapour pressure of benzene is 70 torr and that of methyl benzene is 20 torr. The mole fraction of benzene in the vapour phase at 20$$^\circ$$ above an equimolar mixture of benzene and methyl benzene is _____________ $$\times$$ 10^$$-$$2. (Nearest integer)