Physics-

General

Easy

Question

# Three balls are dropped from the top of a building with equal speed at different angles. When the balls strike ground their velocities are and respectively, then

## The correct answer is:

### All the balls are projected from the same height, therefore their velocities will be equal.

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### When does the current flow through the following circuit ?

### When does the current flow through the following circuit ?

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### The following circuit when expressed in symbolic form of logic is :

### The following circuit when expressed in symbolic form of logic is :

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### Onemoleofanon-idealgasundergoesachange ofstate(2.0atm,3.0L,95K)→(4.0atm,5.0L,245 K)with achangein internalenergy,DU=30.0L atm.Thechangeinenthalpy(DH)oftheprocessinLatmis-

### Onemoleofanon-idealgasundergoesachange ofstate(2.0atm,3.0L,95K)→(4.0atm,5.0L,245 K)with achangein internalenergy,DU=30.0L atm.Thechangeinenthalpy(DH)oftheprocessinLatmis-

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### Inconversion oflime-stonetolime,CaCO3(s)→CaO(s)+CO2(g)thevalues ofDHºandDSºare+179.1kJmol–1and160.2J/Krespectivelyat298Kand1bar.AssumingthatDHºandDSºdonotchange withtemperature,temperatureabovewhich conversionoflimestonetolimewillbespontaneous is-

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### Consider the reaction:N2+ 3H2→2NH3carried out at constant temperature and pressure. If DH and DU are the enthalpy and internal energy changes for the reaction, which of the following expressions is true ?

### Consider the reaction:N2+ 3H2→2NH3carried out at constant temperature and pressure. If DH and DU are the enthalpy and internal energy changes for the reaction, which of the following expressions is true ?

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### Consider a disc rotating in the horizontal plane with a constant angular speed about its centre . The disc has a shaded region on one side of the diameter and an unshanded region on the other side as shown in the figure. When the disc is in the orientation as shown, two pebbles and are simultaneously projected at an angle towards . The velocity of projection is in the plane and is same for both pebbles with respect to the disc. Assume that i) they land back on the disc before the disc has completed rotation. ii) their range is less than half the disc radius, and (iii) remains constant throughout. Then

### Consider a disc rotating in the horizontal plane with a constant angular speed about its centre . The disc has a shaded region on one side of the diameter and an unshanded region on the other side as shown in the figure. When the disc is in the orientation as shown, two pebbles and are simultaneously projected at an angle towards . The velocity of projection is in the plane and is same for both pebbles with respect to the disc. Assume that i) they land back on the disc before the disc has completed rotation. ii) their range is less than half the disc radius, and (iii) remains constant throughout. Then

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### From an inclined plane two particles are projected with same speed at same angle , one up and other down the plane as shown in figure. Which of the following statements is/are correct?

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### If then is

### If then is

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### The free energy change for the following reactions aregivenbelow-C2H2(g)+O2(g)→2CO2(g)+H2O(l);DG°=–1234KJC(s)+O2(g)→CO2(g);DG°=–394KJ H2(g)+O2(g)→H2O(l);DG°=–237KJWhatisthestandardfreeenergychangeforthe reactionH2(g)+2C(s)→C2H2(g)-

### The free energy change for the following reactions aregivenbelow-C2H2(g)+O2(g)→2CO2(g)+H2O(l);DG°=–1234KJC(s)+O2(g)→CO2(g);DG°=–394KJ H2(g)+O2(g)→H2O(l);DG°=–237KJWhatisthestandardfreeenergychangeforthe reactionH2(g)+2C(s)→C2H2(g)-

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### The value of DH–DE for the following reaction at 27°C will be,2NH3(g)→N2(g)+3H2(g)

### The value of DH–DE for the following reaction at 27°C will be,2NH3(g)→N2(g)+3H2(g)

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### If at 298K the bond energies of C–H,C–C,C=C and H–H bonds are respectively 414,347,615and 435KJmol–1,thevalueofenthalpy change for there action H2C=CH2(g)+H2(g)→CH3–CH3(g)at298 K will be-

### If at 298K the bond energies of C–H,C–C,C=C and H–H bonds are respectively 414,347,615and 435KJmol–1,thevalueofenthalpy change for there action H2C=CH2(g)+H2(g)→CH3–CH3(g)at298 K will be-

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### If then n=

### If then n=

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### There were two women participating in a chess tournament Every participant played two games with the other participants the number of games that the men played between themselves proved to exceed by 66 the number of games that the men played with the women The number of participants is

### There were two women participating in a chess tournament Every participant played two games with the other participants the number of games that the men played between themselves proved to exceed by 66 the number of games that the men played with the women The number of participants is

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### 153 games were played at a chess tournament with each contestant playing once against each of the others The number of participants is

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The number of different ways in which a committee of 4 members formed out of 6 Asians, 3 Europeans and 4 Americans if the committee is to have at least one from each of the 3 regional groups is

The number of different ways in which a committee of 4 members formed out of 6 Asians, 3 Europeans and 4 Americans if the committee is to have at least one from each of the 3 regional groups is

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