Question

1)The value of Eo in F=1/4π x q1q2/r^2 (Coulomb's law) is

a)9.854 x10^-12 C^2 N^-1 m^-2
b) 7.854 x 10^-12 C^2 N^-1 m^-2
c)18.854 x10^-12 C^2 N^-1 m^-2
d)6.854 x 10^-12 C^2 N^-1 m^-2

2) In the circuit, the Emf of the cell is 1OV and the terminal P.D. is 6V. If an external resistance of 1 ohm is used, the internal resistance of cell is
a) 1/3 ohm b) 2/3 ohm c) 8/3 ohm d)4/3 ohm

3) If refractive index of small angled prism of 4° is 1.5 then deviation of prism is
a)2 b)3 c)4 d)10

4)The angle between the earth's magnetic axis and geographic axis is:
a) 0 degree b)17 degree c)23 degrees d) undefined

5) Which is the triploblastic animal?
(a) Hydra b)sycon c)obelia d)Ascaris

6)How many moles of so2 are contained in 48 grams of the compound?
a) 0.25 mole b)0.75 mole c)0.5 mole d) 1 mole

7)The hydrogen bond is strongest in:
a)O-H_ _ _S b)S-H_ _ _O c)F-H_ _ _F dF-H_ _ _O​

Answer 1

1) The value of Eo in Coulomb's law is a) 9.854 x 10^-12 C^2 N^-1 m^-2.

`{\rule{200pt}{1pt}} \\`

2) The internal resistance of the cell can be found using the formula:

Emf = Terminal P.D. + (Internal Resistance) x Current

Given that the Emf of the cell is 1V, the terminal P.D. is 6V, and the external resistance is 1 ohm, we can rearrange the formula to solve for the internal resistance:

Internal Resistance = (Emf - Terminal P.D.) / Current

Using the values given, we have:

Internal Resistance = (1V - 6V) / 1 ohm = -5 ohm

However, the internal resistance cannot be negative. This indicates an error in the problem statement, as a negative internal resistance is not physically possible. Please double-check the values provided or consult the original source for clarification.

`{\rule{200pt}{1pt}} \\`

3) The deviation of a prism can be calculated using the formula:

Deviation = (Refractive index - 1) x Angle of Prism

Given that the refractive index of the prism is 1.5 and the angle of the prism is 4°, we can calculate the deviation:

Deviation = (1.5 - 1) x 4° = 0.5 x 4° = 2°

Therefore, the deviation of the prism is 2° (option a).

`{\rule{200pt}{1pt}} \\`

4) The angle between the Earth's magnetic axis and geographic axis is c) 23 degrees. This angle is known as the angle of declination or magnetic declination.

`{\rule{200pt}{1pt}} \\`

5) The triploblastic animal is d) Ascaris. Triploblastic animals have three germ layers: the ectoderm, mesoderm, and endoderm. Ascaris is a type of roundworm that exhibits triploblastic development.

`{\rule{200pt}{1pt}} \\`

6) To determine the number of moles of SO2 in 48 grams of the compound, we need to know the molar mass of SO2. The molar mass of sulfur (S) is 32.07 g/mol, and the molar mass of oxygen (O) is 16.00 g/mol. Adding these values together, we get:

Molar mass of SO2 = (32.07 g/mol) + 2(16.00 g/mol) = 64.07 g/mol

Now we can calculate the number of moles:

Number of moles = Mass / Molar mass

Number of moles = 48 g / 64.07 g/mol ≈ 0.749 mol

Therefore, there are approximately 0.75 moles of SO2 in 48 grams of the compound (option b).

`{\rule{200pt}{1pt}} \\`

7) The hydrogen bond is strongest in b) S-H_ _ _O. In this case, the hydrogen is bonded to oxygen (O), which is highly electronegative. Oxygen has a high affinity for electrons, resulting in a strong hydrogen bond when it interacts with hydrogen (H).

`{\rule{200pt}{1pt}} \\`

`\huge{\mathfrak{\colorbox{black}{\textcolor{lime}{I\:hope\:this\:helps\:!\:\:}}}}`

♥️
`\large{\textcolor{red}{\underline{\mathcal{SUMIT\:\:ROY\:\:(:\:\:}}}}`