Most effective protein denaturant form of guanidinium when used in equimolar concentration is

• Iodide

• Chloride

• Bromide

• Sulphate

For a reaction A → b, the rate of reaction can be represented as :

Where (a) and (a - x) are concentration of reactants at time 0 and t. Then the unit of K will be:

• Mol^-1L^-1

• Mol^-2L^-1

• L-mol^-1s^-1

• Sec^-1

Routinely used glucose biosensor estimates blood glucose level by sensing the concentration of

• Glucose

• Oxygen

• δ-gluconolactone

• H₂O₂

If standardenthalpies of formation for H₂O (g) - 242, CH₄ (g) - 75 and CO₂ (g) is 11 kJ mol^-1 respectively. Determine the heat of reaction of the following reaction:

CH₄(g) + 2H₂O (g) → CO₂ (g) + 4H₂

• -202 kJ mol^-1

• +206 kJ mol^-1

• -670 kJ mol^-1

• -745 kJ mol^-1

An aero plane flies with a ground speed of 800km/h and velocity of wind is constant 50km/h. If this aero plane flies one hour upstream and one hour downstream of wind. Then total distance covered and average speed will be :

• 1600 km and 800 km/h

• 1650 km and 825 km/h

• 1550 km and 775 km/h

• 1700 km and 850 km/h

At 35°C ambient room temperature any liquid in two containers are allowed to cool from 100°C to 70°C and 80°C to 50°C respectively. If we compare rate cooling in we find that rate of cooling in later will be :

• Slow

• Fast

• Both at same rate

• Depends on container size

In a given circuit voltage drop at diode is 0.9 V.

Then which statement is correct

• More current is flowing through path AB         

• More current is flowing through path CD              

• Equal current is flowing from both routes      

• Resistance is not influencing flow of current      

A bottle containing 2 mL of ¹⁴C labeled phenyl alanine shows radioactivity of 1 mCi. The specific activity of isotope is 200 Ci/m Mol. Then the concentration of phenyl alanine in bottle is:

• 200 × 10^-3 M

• 400 × 10³ M

• 100 × 10^-3 M

• 2.5 × 10^-3 M

Under what thermodynamically condition reaction would be spontaneous?

• $∆$H > 0 and $∆$S > 0

• $∆$H < 0 and $∆$S > 0

• $∆$H < 0 and $∆$S < 0

• $∆$H > T$∆$S

Frog A has length ‘l’ and weight ‘w’. Another frog ‘B’ has double length and four times weight. It means

• Frog A is more cylindrical   

• Frog B is more cylindrical   

• Frog A has low surface to volume ratio 

• Frog B is overweight