The first ionisation potentials of four consecutive elements, present in the second period of the periodic table are 8.3, 11.3, 14.5 and 13.6 *eV* respectively. Which one of the following is the first ionisation potential (in *eV*) of nitrogen?

- a)13.6
- b)11.3
- c)8.3
- d)14.5

Correct answer is option 'D'. Can you explain this answer?

Abhi Verma answered • 2 hours ago

Yes , the correct answer is D=14.5
Because Nitrogen has higher Ionic Potential(IP) than Oxygen (on its right) and carbon(on its left) Now question arise why nitrogen has higher potential than oxygen even when IP increases left to righ in periodic table ?
And the answer for this question is :
nitrogen has half filled 2p subshell which a stable configuration and it don't wa... more

Compound V is

- a)
- b)
- c)
- d)

Correct answer is option 'B'. Can you explain this answer?

Yash Gupta answered • 4 hours ago

I don't understand your question

Sandeep Kumar Chaudhary asked • 2 minutes ago

3 A of current is flowing in a linear conductor having a length of 40 cm. The conductor is placed in a magnetic field of strength 500 gauss and makes an angle of 30∘ with the direction of the field. It experiences a force of magnitude [MP PET 1993]

- a)3×10
^{4}newton - b)3×10
^{3}newton - c)3×10
^{-2}newton - d)3×10
^{-4}newton

Correct answer is option 'C'. Can you explain this answer?

Shivam Vohra asked • 18 minutes ago

Can you explain the answer of this question below:

Please go through following and answer question no.3 to no.6

Imagine your Information Technology business in a resort-like ambience. Your employees could have a holiday on every working day! Yes, God's own country is fast emerging as India's most happening Information Technology/Information Technology Enabled Services destination. The enviable tranquility, cleanliness, greenery and physical quality of life add to the aura. Consistently ranked as the No. 1 State in social achievements, Kerala is a dream destination for even the most discerning tourist. National Geographic Traveller has dubbed the State as "one of the ten paradises of the world". Not for nothing. Its natural beauty, picturesque backwaters, enchanting beaches, authentic ayurvedic rejuvenation centres and rich cultural heritage continue to hold people from all over the world, spellbound. But of late, the State is turning out to be a one-stop address for every Information Technology need as well.

**4. Which one of the following statements is correct?**

Jaswant Singh asked • 24 minutes ago

Two coins are avilable, one fair and the other two-headed. Choose a coin and toss it once; assume that the unbiased coin is chosen with probalility 3/4. Given that the outcome is head, the probability that the two-headed coin waschosen is

- a)3/5
- b)2/5
- c)1/5
- d)2/7

Correct answer is option 'B'. Can you explain this answer?

Raj Bala asked • 30 minutes ago

Which of the following is the converse of the statement: "If x > 4, then x + 2 > 5"?

- a)If x+2 < 5, then x < 4
- b)If x is not greater than 4, then x + 2 is not greater than 5
- c)If x + 2 > 5, then x > 4
- d)If x + 2 is not greater than 5, then x is not greater than 4

Correct answer is option 'C'. Can you explain this answer?

Sourav Mishra asked • 34 minutes ago

A simple pendulum of length l has a bob of mass m, with a charge q on it. A vertical sheet of charge, with surface charge density σ passes through the point of suspension. At equilibrium, the spring makes an angle θ with the vertical. its time period oscillations is T in this poisiton. Then

- a)tanθ=σq/2ε₀mg
- b)tanθ=σq/ε₀mg
- c)T>2π√l/g
- d)T=2π√l/g

Correct answer is option 'A'. Can you explain this answer?

Arjun Singh asked • 47 minutes ago

A triangular medium has varying refracting index n = n_{0} + ax, where x is the distance (in cm) along x–axis from origin and n_{0} = 4/3 . A ray is incident normally on face OA at the mid–point of OA. The range of a so that light does not escape through face AB when it falls first time on the face AB (O = 4 cm, OB = 3 cm and AB = 5 cm) : (Surrounding medium is air)

- a)a > 1/9
- b)a > 2/9
- c)a > 1/3
- d)None of these

Correct answer is option 'B'. Can you explain this answer?

Zile Singh asked • 58 minutes ago

The average mass of rain drops is 3.0 × 10^{–5} kg and their average terminal velocity is 9 m/s. Calculate the energy transferred by rain to each square meter of the surface at a place which receives 100 cm of rain in a year.

- a)9.0 × 10
^{4}J - b)4.05 × 10
^{4}J - c)3.5 × 10
^{5}J - d)3.0 × 10
^{5}J

Correct answer is option 'B'. Can you explain this answer?

Siddharth Tata asked • 1 hour ago

An oil drop carrying a charge q has a mass m kg. It is falling freely in air with terminal speed ν. The electric field required to make the drop move upwards with the same speed is

- a)mg/q
- b)2 mg/q
- c)mg ν/q
^{2} - d)2 mg ν/q

Correct answer is option 'B'. Can you explain this answer?

Nikunj Aggarwal asked • 1 hour ago

An open vessel at 27°C is heated until two fifth of the air (assumed as an ideal gas) in it has escaped from the vessel. Assuming that the volume of the vessel remains constant, the temperature at which the vessel has been heated is

- a)750 °C
- b)750 K
- c)500 °C
- d)500 K

Correct answer is option 'D'. Can you explain this answer?

Sudhir Yadav asked • 1 hour ago

In a town of 10,000 families it was found that 40% family buy newspaper A, 20% buy newspaper B, and 10% families buy newspaper C, 5% families buy A and B, 3% buy B and C and 4% buy A and C. If 2% families buy all the three newspapers, then number of families which buy A only is

- a)3100
- b)3300
- c)2900
- d)1400

Correct answer is option 'B'. Can you explain this answer?

Standard User asked • 1 hour ago

Choose the correct reason(s) for the stability of the lyophobiccolloidal particles. (2012)

- a)Preferential adsorption of ions on their surface fromthe solution.
- b)Preferential adsorption of solvent on their surface from the solution.
- c)Attraction between different particles having opposite charges on their surface.
- d)Potential difference between the fixed layer and the

diffused layer of opposite charges around the colloidal particles.

Correct answer is option 'A,D'. Can you explain this answer?

Josh Mathew asked • 1 hour ago

In a system of particles 8 kg mass is subjected to a force of 16 N along +ve x−axis and another 8 kg mass is subjected to a force of 8 N along +ve y−axis. The magnitude of acceleration of centre of mass and the angle made by it with x−axis are given respectively by

- a)√5/2ms
^{-2},θ=45º - b)3√5ms
^{-2},θ=tan^{-1}(2/3) - c)√5/2ms
^{-2},θ=tan^{-1}(1/2) - d)1ms
^{-2},θ=tan^{-1}(√3)

Correct answer is option 'C'. Can you explain this answer?

Tulsa Devi asked • 2 hours ago

Which one of the following properties is exhibited by phenol?

- a)It is soluble in aq. NaOH and evolves CO
_{2}with aq. NaHCO_{3} - b)It is soluble in aq. NaOH and does not evolve CO
_{2}with aq. NaHCO_{3} - c)It is not soluble in aq. NaOH but evolves CO
_{2}with aq. NaHCO_{3} - d)It is insoluble in aq. NaOH and does not evolve CO
_{2 }with aq. NaHCO_{3}

Correct answer is option 'B'. Can you explain this answer?

Smt Premo Devi asked • 2 hours ago

Two conducting balls each of mass 15 gm and having equal charge on them of 126 μC are suspended by two 1 m long silk threads as shown. The separation between them is 8 cm when they are in equilibrium. When one of the balls is discharged to have half the original charge on each the new equilibrium separation will be –

- a)8 cm
- b)5 cm
- c)12 cm
- d)2 cm

Correct answer is option 'B'. Can you explain this answer?

Norata Ram asked • 3 hours ago

A circular loop of radius 0.3 cm lies parallel to a much bigger circular loop of radius 20 cm. The centre of

the small loop is on the axis of the bigger loop. The distance between their centres is 15 cm. If a current of

2.0 A flows through the smaller loop, then the flux linked with bigger loop is

the small loop is on the axis of the bigger loop. The distance between their centres is 15 cm. If a current of

2.0 A flows through the smaller loop, then the flux linked with bigger loop is

- a)6 × 10
^{–11}weber - b)3.3 × 10
^{–11}weber - c)6.6 × 10
^{–11}weber - d)9.1 × 10
^{–11}weber

Correct answer is option 'D'. Can you explain this answer?

Sunita asked • 3 hours ago

The horizontal surface below the bigger block is smooth. The coefficient of friction between the blocks is μ. The maximum force which can be applied to keep the smaller blocks at rest with respect to the bigger block is

- a)
- b)
- c)
- d)(1 + μ) (M + 2m) g

Correct answer is option 'C'. Can you explain this answer?

Abhiraji Devi asked • 3 hours ago

A bar magnet has a magnetic moment of 200 A.m^{2.} The magnet is suspended in a magnetic field of 0.30 NA^{–1} m^{–1}. The torque required to rotate the magnet from its equilibrium position through an angle of 30°, will be

- a)30N m
- b)30√3 N m
- c)60 N m
- d)60√3 N m

Correct answer is option 'A'. Can you explain this answer?

Alokik Gupta asked • 4 hours ago

A mass M collides elastically with a stationary mass m. If M < m, then it is possible for M to bounce directly backwards. However, if M > m, then there is a maximum angle of deflection of M. Then angle is

- a)sin φ = M/m
- b)sin φ = m/M
- c)tan φ = M/m
- d)tan φ = m/M

Correct answer is option 'B'. Can you explain this answer?

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