List of practice Questions

75% of a first order reaction was completed in 32 minutes. When was 50% of the reaction completed

Raindrops falling down attain limited value of velocity because of

Which of the following pairs is isoelectronic?

Four wires of the same material are stretched by the same load. Which one of them will elongate most if their dimensions are as follows

Which one does not show HSK pathway ?

Biennials get changed into annuals by

Pulmonary trunk and aorta are attached by

A hormone delaying senescence is

Anticoagulant hirudin is obtained from genetically modified

The increase in pressure required to decrease the $ 200 \,L $ volume of a liquid by $ 0.008\% $ in $ kPa $ is (Bulk modulus of the liquid $ = 2100 \,MPa $ is)

$ U $ is the $ PE $ of an oscillating particle and $ F $ is the force acting on it at a given instant. Which of the following is true ?

A nitrogen fixing blue-green alga is

Which ones are gustatoreceptors ?

Facultative reabsorption of water occurs in

The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?

How many isomeric vicinal-dihalides are possible for the compound having molecular formula $ C_3H_6C_{12} $ ?

Potassium metabisulphite is a (an)

The units of rate constant for first order reaction are

With an increase in temperature, surface tension of liquid (except molten copper and cadmium)

How many gram-equivalents of $ NaOH $ are required to neutralise $ 25 \,cm^3 $ of a decinormal $ HCl $ solution?

In the following reaction sequence, $ \ce{CH3CHO ->[Cl_2][Ca(OH)_2] X ->[C_6H_5NH_2][Alc. KOH] Y}$ $Y$ is

On the surface of the liquid in equilibrium, molecules of the liquid possess

In sine wave, minimum distance between $ 2 $ particles always having same speed is

$ 1\, C $ electricity deposits

Which of the following compounds, when heated at 483 K turns to caramel?