Question:
A) C6H6
B) CH3CH2CH2CH2CH2COH6
C) NaCl
D) NH3
Answer:
The correct option is;
A) C₆H₆
Explanation:
Heat of fusion = 6.02 kJ/mol
Heat of vaporization =40.8 kJ/mol
Here, we analyze each of the options as follows
A) C₆H₆
Benzene has a melting point of 5.5° C and a boiling point of
80.1 ° C similar to water
Heat of fusion = 9.92 kJ/mol
Heat of vaporization =30.8kJ/mol
B) CH₃CH₂CH₂CH₂CH₂COH₆
The above compound is more likely solid
C) NaCl solid
D) NH₃ melting point = -77.73 °C boiling point = -33.34 °C
Of the above, the compounds the one that closely resembles water is C₆H₆
Answer:
Explained
Explanation:
1.Each of the spring scale will read 10N,considering acceleration due to gravity as 10 m/s^2
2.Each of the spring scale will read 10N because each string exerts a force of 10 N to counterbalance the force of 1 kg mass attached to it. This means the tension on the both side of the string is 10 N. So the scale will read 10 N. Also as spring balances are attached in series and kept on table so both spring balances will read same readings.
Friction in the machine turned 15 joules of the energy input into heat. If you were monitoring the parts of the machine closely, you would notice that some of them warmed up.
Answer:
Option B is the correct answer
Explanation:
Atomic number of Americium is 95 however in option B it is given as 94.
Thus, option B is the correct answer.
Answer:
Magnetic field shall be zero at exactly in between the wires.
Explanation:
We can find the magnetic field by biot Savart law as follows

For current carrying wire in positive y direction we have

Similarly for wire carrying current in -y direction we have 
Thus the net magnetic field at any point in space is given by


For points with same position vectors from the 2 wires we have a net zero magnetic field. These points are exactly midway between the 2 wires