100525 + Interview Questions in GENERAL QA IN GENERAL AWARENESS

1.	Give any one example of bidentate ligand.
Answer» Example of bidentate ligand is Ethylene diamine [H₂N - CH₂-CH₂ NH₂].

Discussion

2.	Write IUPAC name of Diethyl ether.
Answer» IUPAC name of Diethyl ether is ethoxy ethane.

Discussion

3.	When the capacitor is fully charged, work done by cell is w=n1 x CV2 the energy stored in the capacitor is U= n2 x CV2 and the heat produced across resistor is,
Answer» The answer is 3

Discussion

4.	Assuming the earth to be a homogeneous sphere of radius `R`, its density in terms of `G` (constant of gravitation) and `g` (acceleration due to gravity on the surface of the earth)A. `3g//(4piRG)`B. `4pig//(3RG)`C. `4piRg//(3G)`D. `4piRG//(3g)`
Answer» Correct Answer - A `g=(GM)/(R^(2))` or `g/(4/3piR)=(GM)/(4/3piR^(3))` or `(3g)/(4piRG)=rho`

Discussion

5.	Assertion: Water drops take spherical shape when falling freely. Reason: Water has minimum surface tension among all liquids. (1) If both assertion and reason are true and reason is the correct explanation of assertion. (2) If both assertion and reason are true but reason is not the correct explanation of assertion. (3) If assertion is true but reason is false. (4) If both assertion and reason are false.
Answer» Correct option (4) If both assertion and reason are false. Explanation: Water drops take oval shape when falling freely. Surface tension of water is not minimum among all liquids.

5.

Assertion: Water drops take spherical shape when falling freely. Reason: Water has minimum surface tension among all liquids. (1) If both assertion and reason are true and reason is the correct explanation of assertion. (2) If both assertion and reason are true but reason is not the correct explanation of assertion. (3) If assertion is true but reason is false. (4) If both assertion and reason are false.

Answer»

Correct option (4) If both assertion and reason are false.

Explanation:

Water drops take oval shape when falling freely. Surface tension of water is not minimum among all liquids.

Discussion

6.	Assertion : The graph between P V/s 1/V is a straight line. Reason : For adiabatic process P ∝ 1/V(1) If both assertion and reason are true and reason is the correct explanation of assertion. (2) If both assertion and reason are true but reason is not the correct explanation of assertion. (3) If assertion is true but reason is false. (4) If both assertion and reason are false.
Answer» (3) If assertion is true but reason is false.

Discussion

7.	Assertion: In adiabatic process work is independent of path. Reason: In adiabatic process work done is equal to negative of change in internal energy.(1) If both assertion and reason are true and reason is the correct explanation of assertion.(2) If both assertion and reason are true but reason is not the correct explanation of assertion.(3) If assertion is true but reason is false.(4) If both assertion and reason are false.
Answer» Correct option (1) If both assertion and reason are true and reason is the correct explanation of assertion. Explanation: For adiabatic process Q = 0 = ΔU + W W = –ΔU

7.

Assertion: In adiabatic process work is independent of path. Reason: In adiabatic process work done is equal to negative of change in internal energy.(1) If both assertion and reason are true and reason is the correct explanation of assertion.(2) If both assertion and reason are true but reason is not the correct explanation of assertion.(3) If assertion is true but reason is false.(4) If both assertion and reason are false.

Answer»

Correct option (1) If both assertion and reason are true and reason is the correct explanation of assertion.

Explanation:

For adiabatic process Q = 0 = ΔU + W

W = –ΔU

Discussion

8.	The degree of freedom of a triatomic gas is?(a) 1(b) 2(c) 6(d) 8
Answer» The correct choice is (c) 6 The explanation is: A triatomic gas molecule has 3 degrees of freedom due to translator motion and 3 degrees of freedom due to rotator motion.

Discussion

9.	Assertion: P v/s 1/V graph is straight line for adiabatic processReason: PV = constant for adiabatic process (1) If both assertion and reason are true and reason is the correct explanation of assertion. (2) If both assertion and reason are true but reason is not the correct explanation of assertion. (3) If assertion is true but reason is false. (4) If both assertion and reason are false.
Answer» Correct option (4) If both assertion and reason are false. Explanation: P v/s 1/V^yis straight line process equation for adiabatic is PV^y= constant.

9.

Assertion: P v/s 1/V graph is straight line for adiabatic processReason: PV = constant for adiabatic process (1) If both assertion and reason are true and reason is the correct explanation of assertion. (2) If both assertion and reason are true but reason is not the correct explanation of assertion. (3) If assertion is true but reason is false. (4) If both assertion and reason are false.

Answer»

Correct option (4) If both assertion and reason are false.

Explanation:

P v/s 1/V^yis straight line process equation for adiabatic is PV^y= constant.

Discussion

10.	If in a meter bridge experiment, the balancing length l was 25 cm for the situation shown in the figure. If the length and diameter of the of wire of resistance R is made half, then find the new balancing length in centimetre is
Answer» X/R = 75/25 = 3 R = ρl/A = 4ρl/πd² R' = (4ρ(l/2))/π(d/2)² = 2R then X/R' = ((100 - l)/l) (100 - l)/l = X/2R = 3/2 l = 40.00cm

10.

If in a meter bridge experiment, the balancing length l was 25 cm for the situation shown in the figure. If the length and diameter of the of wire of resistance R is made half, then find the new balancing length in centimetre is

Answer»

X/R = 75/25 = 3

R = ρl/A = 4ρl/πd²

R' = (4ρ(l/2))/π(d/2)² = 2R

then X/R' = ((100 - l)/l)

(100 - l)/l = X/2R = 3/2

l = 40.00cm

Discussion

11.	Two ideal di-atomic gases A and B. A is rigid, B has an extra degree of freedom due to vibration. Mass of A is m and mass of B is m/4. The ratio of molar specific heat of A to B at constant volume is : (1) 7/9(2) 5/9(3) 5/114) 5/7
Answer» The answer is (4) 5/7 Molar heat capacity of A at constant volume = 5R/2 Molar heat capacity of B at constant volume = 7R/2 Dividing both,(C_v)A/(C_v)B = 5/7.

11.

Two ideal di-atomic gases A and B. A is rigid, B has an extra degree of freedom due to vibration. Mass of A is m and mass of B is m/4. The ratio of molar specific heat of A to B at constant volume is : (1) 7/9(2) 5/9(3) 5/114) 5/7

Answer»

The answer is (4) 5/7

Molar heat capacity of A at constant volume = 5R/2

Molar heat capacity of B at constant volume = 7R/2

Dividing both,(C_v)A/(C_v)B = 5/7.

Discussion

12.	Assertion : Vibrational degree of freedom of a di-atomic gas molecule appears at every high temperature. Reason : Di-atomic gas has two vibrational degree of freedom in one direction. (1) If both assertion and reason are true and reason is the correct explanation of assertion. (2) If both assertion and reason are true but reason is not the correct explanation of assertion. (3) If assertion is true but reason is false. (4) If both assertion and reason are false.
Answer» (2) If both assertion and reason are true but reason is not the correct explanation of assertion.

Discussion

13.	How much it is required to convert 10 gram of ice at – 5° into steam at 100°C. Given specific heat of ice 2.1 J g-10 C-1. Latent heat of steam = 2268 J g-1 and latent hear of fusion of ice is 336 J/g. Specific heat of water = 4.2 J g-10 C-1.
Answer» Q₁ = mS_iΔT = 10 × 2.1 × 5 = 105 J Q₂ = mL_f = 10 × 336 = 3360 J Q₃ = mS_w ΔT = 10 × 4.2 × 100 = 4200 J Q₄ = mL_v =10 × 2268 = 22680 J Q = Q₁ + Q₂ + Q₃ + Q₄ = 105 + 3360 + 4200 + 22680 = 30345 J

13.

How much it is required to convert 10 gram of ice at – 5° into steam at 100°C. Given specific heat of ice 2.1 J g-10 C-1. Latent heat of steam = 2268 J g-1 and latent hear of fusion of ice is 336 J/g. Specific heat of water = 4.2 J g-10 C-1.

Answer»

Q₁ = mS_iΔT = 10 × 2.1 × 5 = 105 J

Q₂ = mL_f = 10 × 336 = 3360 J

Q₃ = mS_w ΔT = 10 × 4.2 × 100 = 4200 J

Q₄ = mL_v =10 × 2268 = 22680 J

Q = Q₁ + Q₂ + Q₃ + Q₄

= 105 + 3360 + 4200 + 22680 = 30345 J

Discussion

14.	An object is moving with acceleration but with uniform speed. Is it possible or no?
Answer» An object is moving with acceleration but with uniform speed – Possible An object moving in a circular path with uniform speed, i.e. covering an equal distance in an equal amount of time is still under acceleration. Because the velocity keeps on changing due to continuous change in the direction of motion. Therefore, circular motion is an example of an object moving with acceleration but with uniform speed.

14.

An object is moving with acceleration but with uniform speed. Is it possible or no?

Answer»

An object is moving with acceleration but with uniform speed – Possible

An object moving in a circular path with uniform speed, i.e. covering an equal distance in an equal amount of time is still under acceleration. Because the velocity keeps on changing due to continuous change in the direction of motion. Therefore, circular motion is an example of an object moving with acceleration but with uniform speed.

Discussion

15.	Write the dimensional formula for linear momentum.
Answer» Formula for linear momentum : M¹L¹T^-1

15.

Write the dimensional formula for linear momentum.

Answer»

Formula for linear momentum :

M¹L¹T^-1

Discussion

16.	What is unit vector?
Answer» It is the vector having unit magnitude.

Discussion

17.	Define radius of gyration.
Answer» It is the distance between the point at which the entire mass of the body is concentrated from the axis of rotation.

Discussion

18.	The ultimate tensile strain in steel is in the range of1. 0.012 - 0.0202. 0.0012 - 0.00203. 0.12 - 0.204. 0.00012 - 0.00020
Answer» Correct Answer - Option 2 : 0.0012 - 0.0020 Explanation: Steel reinforcing rods are used in concrete beams to make it carry tension. As concrete is strong in compression but weak in tension and its tensile strength is approx 1/10th of compressive strength. To improve its tensile strength, reinforcement ( steel reinforcing rods ) is embedded in it. Ultimate tensile strain in steel is in the range of = 0.12% to 0.2% = 0.0012 to 0.002

18.

The ultimate tensile strain in steel is in the range of1. 0.012 - 0.0202. 0.0012 - 0.00203. 0.12 - 0.204. 0.00012 - 0.00020

Answer» Correct Answer - Option 2 : 0.0012 - 0.0020

Explanation:

Steel reinforcing rods are used in concrete beams to make it carry tension.
As concrete is strong in compression but weak in tension and its tensile strength is approx 1/10th of compressive strength. To improve its tensile strength, reinforcement ( steel reinforcing rods ) is embedded in it.
Ultimate tensile strain in steel is in the range of = 0.12% to 0.2% = 0.0012 to 0.002

Discussion

19.	What is the weight of a body at the centre of the earth?
Answer» zero is the weight of a body at the centre of the earth.

Discussion

20.	What is rigidity modulus of liquid?
Answer» Zero is rigidity modulus of liquid.

Discussion

21.	Assertion:- Transvers waves are produced in a very long string fixed at one end. Near the free end only progressive wave is observed. Reason:- Energy of reflected wave does does not reach the free end.A. If both Assertion `&` Reason are True `&` the Reason is a correct explanation of the Assertion.B. If both Assertion `&` Reason are True but Reason is not a correct explanation of the Assertion.C. If Assertion is True but the Reason is False.D. If both Assertion `&` Reason are False.
Answer» Correct Answer - A

Discussion

22.	Between steel and diamond, which is more elastic?
Answer» Steel is more elastic then diamond.

Discussion

23.	calculate the kinetic energy of a bullet of mass 0.0022kg moving with a velocity of 500m/s
Answer» K.E = 1/2 mv²= 1/2 x 0.0022 x (500)² = 275 Joule

23.

calculate the kinetic energy of a bullet of mass 0.0022kg moving with a velocity of 500m/s

Answer»

K.E = 1/2 mv²= 1/2 x 0.0022 x (500)²

= 275 Joule

Discussion

24.	For most materials the Young’s modulus is n times the rigidity modulus, where n is (a) 2 (b) 3 (c) 4 (d) 5
Answer» (b) 3 For most materials, the modulus of rigidity, η is one third of the Young’s modulus, Y. η = \(\frac{1}{3}\)Y or Y = 3η ∴ n = 3.

24.

For most materials the Young’s modulus is n times the rigidity modulus, where n is (a) 2 (b) 3 (c) 4 (d) 5

Answer»

(b) 3 For most materials, the modulus of rigidity, η is one third of the Young’s modulus, Y.

η = \(\frac{1}{3}\)Y or Y = 3η

∴ n = 3.

Discussion

25.	Young’s modulus of the wire depends on (a) length of the wire (b) diameter of the wire (c) material of the wire (d) mass hanging from the wire
Answer» Correct answer is (c) material of the wire Young’s modulus of wire depends only on the nature of the material of the wire.

25.

Young’s modulus of the wire depends on (a) length of the wire (b) diameter of the wire (c) material of the wire (d) mass hanging from the wire

Answer»

Correct answer is (c) material of the wire

Young’s modulus of wire depends only on the nature of the material of the wire.

Discussion

26.	Name the material which is famous for a large elastic after effect.
Answer» Glass is a famous material for a large elastic after effect.

Discussion

27.	When wire is bent back and forth, it becomes hot. Why?
Answer» When wire is bent back and forth, the deformations are beyond elastic limit. A part of work done is converted in to heat energy. Hence wire becomes hot.

27.

When wire is bent back and forth, it becomes hot. Why?

Answer»

When wire is bent back and forth, the deformations are beyond elastic limit. A part of work done is converted in to heat energy. Hence wire becomes hot.

Discussion

28.	Why work is required to be done to stretch a wire?
Answer» Work is required to be done against the inter molecular forces of attraction.

Discussion

29.	Identify the type of modulus in twisting of cylinder.
Answer» Twisting of cylinder contains Shear modulus.

Discussion

30.	A stone is dropped from top of a tower 100 m height. At the same instant another stone is thrown vertically upward from the base of the tower with the velocity of 25 m/s. When and where will the two stones meet? Given g = 10 m/s2.
Answer» For Stone A, u = 0, S = x and a = + g = 10 m/s² Formula s = ut + 1/2 at² Arriving at x = 5t² —(1) For stone B s = 100 – x, a = – g and u = 25 m/s Arriving at 100 – x = 25t – 5t² …(2) Obtaining t = 4 second Obtaining x = 80 m

30.

A stone is dropped from top of a tower 100 m height. At the same instant another stone is thrown vertically upward from the base of the tower with the velocity of 25 m/s. When and where will the two stones meet? Given g = 10 m/s2.

Answer»

For Stone A, u = 0, S = x and a = + g = 10 m/s²

Formula s = ut + 1/2 at²

Arriving at x = 5t² —(1)

For stone B s = 100 – x, a = – g and u = 25 m/s

Arriving at 100 – x = 25t – 5t² …(2)

Obtaining t = 4 second

Obtaining x = 80 m

Discussion

31.	A circular current carrying loop of radius R, carries a current l. The magnetic field at a point on the axis of coll is `(1)/(sqrt(8))` times the value of magnetic field at the centre. Distance of point from centre isA. `(R )/(sqrt(2))`B. `(R )/(sqrt(3))`C. `Rsqrt(2)`D. R
Answer» Force on the dielectric `=(epsilon_(0)bv^(2)(k-1))/(2d)` If rise due to this force be `x_(1)` then `=(epsilon_(0)bv^(2)(k-1))/(2d)=(dL)x_(1)pg` Then `x_(2)` is the rise due to surface tension `T((1)/(r_(1))+(1)/(r_(2)))=T((1)/(oo)+(1)/(d//2))=(2T)/(d)=(x_(2))pg` `x_(1)+x_(2)=(epsilon_(0)bv^(2)(k-1))/(2d^(2)Lpg)+(2T)/(dpg)=5+2=7mm`

Discussion

32.	A positive charge q is projected in magnetic field of width `(mv)/(sqrt(2)qB)` with velocity v as shown in figure. Then time taken by charged particle to emerge from the magnetic field is A. `(m)/(sqrt(2)qB)`B. `(pim)/(4qB)`C. `(pim)/(2qB)`D. `(pim)/(sqrt(2)qB)`
Answer» Correct Answer - D `(A) Agl//Ag^(+) "Positively charged solution (excess " AgNO_(3))` (B) `C*O_(2)` is information (C ) Tyndall effect is more dominating in lyophobic solution. (D) Extent of physisorption decreases with increases in temperature.

Discussion

33.	A particle of charge q, mass m starts moving from origin under the action of an electric field `vec(E)=E_(0)hat(i)` magnetic field `vec(B)=B_(0)hat(k)`. Its velocity at `(x,0,0)` is `6hat(i)+8hat(j)`. The value of x isA. `(25m)/(qE_(0))`B. `(100m)/(qB_(0))`C. `(50m)/(qE_(0))`D. `(14m)/(qE_(0))`
Answer» Correct Answer - Bonus

Discussion

34.	The magnetic field at a point inside a 2.0 mH inductor coil becomes 0.80 of its maximum value in `20 mu s ` when the inducto is joined to a battery. Find the resistance of the circuit.A. `80 Omega`B. `320 Omega`C. `160 Omega`D. `40 Omega`
Answer» Correct Answer - C `Cr_(2)O_(3)(s)+Na_(2)CO_(3)(s)underset("state in absence of air")overset("Heated to molten")(rarr) underset(("x")) (NaCrO_(2))+CO_(2)(g)` `NaCrO_(2)+underset(("excess"))(H_(2)O)rarrNa[Cr(OH)_(4)]overset(CO_(2)(g))(rarr) Cr(OH)_(3)darr`

Discussion

35.	A pressure-pump has a horizontal tube of cross-sectional area 10 cm2 for the outflow of water at a speed of 20 m/s. The force exerted on the vertical wall just in front of the tube which stops water horizontally flowing out of the tube, is: [given : density of water = 1000 kg/m3] (A) 300 N (B) 500 N (C) 250 N (D) 400 N
Answer» Correct option is (D) 400 N F = Pa\(\nu\)²= 10³ x 10 x 10^-4 x 20 x 20 F = 400

35.

A pressure-pump has a horizontal tube of cross-sectional area 10 cm2 for the outflow of water at a speed of 20 m/s. The force exerted on the vertical wall just in front of the tube which stops water horizontally flowing out of the tube, is: [given : density of water = 1000 kg/m3] (A) 300 N (B) 500 N (C) 250 N (D) 400 N

Answer»

Correct option is (D) 400 N

F = Pa\(\nu\)²= 10³ x 10 x 10^-4 x 20 x 20

F = 400

Discussion

36.	What are the neutral oxides of nitrogen?
Answer» Neutral oxides of nitrogen `NO` and `N_2O`.Nitric oxide and nitrous oxide

Discussion

37.	What are the paramagnetic oxides of nitrogen?
Answer» Paramagnetic oxides of nitrogen: `NO` and `NO_2`.

Discussion

38.	Name the halides formed by nitrogen.
Answer» Halides formed by nitrogen : `NF_3` and `NCl_3`.

Discussion

39.	Why `+5` state is uncommon in bismuth.
Answer» Due to inert pair effect `+5` oxidation state is uncommon in bismuth.

Discussion

40.	Which element of group 15 undergoes sublimation?
Answer» Arsenic undergoes sublimation.

Discussion

41.	Limitation of Coulomb’s Law.
Answer» 1- It is only valid for Chargest at rest 2- It is only applicable for Point charge & 3- It is applicable for distance gratter then 10-15 m Limitations of Coulomb’s Law Coulomb’s Law is applicable only for the point charges which are at rest This Law can only be applied in the cases where the inverse square law is obeyed It is difficult to implement this Law where the charges are in arbitrary shape because in those cases we cannot determine the distance between the charges The Law cannot be used directly to calculate the charge on the big planets

41.

Limitation of Coulomb’s Law.

Answer»

1- It is only valid for Chargest at rest

2- It is only applicable for Point charge

&

3- It is applicable for distance gratter then 10-15 m

Limitations of Coulomb’s Law

Coulomb’s Law is applicable only for the point charges which are at rest
This Law can only be applied in the cases where the inverse square law is obeyed
It is difficult to implement this Law where the charges are in arbitrary shape because in those cases we cannot determine the distance between the charges
The Law cannot be used directly to calculate the charge on the big planets

Discussion

42.	Which of the following is NOT the property of equipotential surface? (i) They do not cross each other. (ii) The rate of change of potential with distance on them is zero. (iii) For a uniform electric field they are concentric spheres. (iv) They can be imaginary spheres.
Answer» Answer is (iii) For a uniform electric field they are concentric spheres. As all other statements are correct. In uniform electric field equipotential surfaces are never concentric spheres but are planes ⊥ to Electric field lines.

42.

Which of the following is NOT the property of equipotential surface? (i) They do not cross each other. (ii) The rate of change of potential with distance on them is zero. (iii) For a uniform electric field they are concentric spheres. (iv) They can be imaginary spheres.

Answer»

Answer is (iii) For a uniform electric field they are concentric spheres.

As all other statements are correct. In uniform electric field equipotential surfaces are never concentric spheres but are planes ⊥ to Electric field lines.

Discussion

43.	The coordinates of a particle moving in XY-plane very with time as `x=4t^(2),y=2t`. The locus of the particle isA. Straight lineB. CircleC. ParabolaD. Ellipse
Answer» Correct Answer - C `x=4t^(2)` and `y=2trArrx=y^(2)rArr` Parabolic path.

Discussion

44.	The kinetic energy of a particle of mass m moving with speed v is given by `K=(1)/(2)mv^(2)`. If the kinetic energy of a particle moving along x-axis varies with x as `K(x)=9-x^(2)`, then The region in which particle lies is :A. `x ge 9`B. `-3 le x le 3`C. `0 le x le 9`D. `-oo lt x lt oo`
Answer» Correct Answer - 2 As`" "K= (1)/(2) mv^(2) ge 0 ` so ` 9-x^(2) ge 0 rArr -3 le x le 3`

Discussion

45.	If `3 cos theta+4 sin theta=A sin (theta+alpha)`, then values of A and `alpha ` areA. `5,cos ^(-1)((3)/(5))`B. `5, sin^(-1)((3)/(5))`C. `7, sin^(-1)((4)/(5))`D. None of these
Answer» Correct Answer - B `3costheta+4sin theta=5[(3)/(5)cos theta+(4)/(5)sin theta]` `=5[ sin alpha cos theta + cos alpha sin theta]=5 sin (theta+alpha)` Therefore A=5 and `alpha=sin^(-1)((3)/(5))`

Discussion

46.	The kinetic energy of a particle of mass m moving with speed v is given by `K=(1)/(2)mv^(2)`. If the kinetic energy of a particle moving along x-axis varies with x as `K(x)=9-x^(2)`, then The region in which particle lies is :A. `xge9`B. `-3lexxle3`C. `0lexxle9`D. `-ooltxxltoo`
Answer» Correct Answer - B As `K=(1)/(2)mv^(2)ge0` so `9-x^(2)ge0rArr-3lexxle3`

Discussion

47.	A particle moves along the straight line `y=3x+5`. Which coordinate changes at faster rate?A. x-coordinateB. y-coordinateC. Both x and y coordinateD. Data insufficient.
Answer» Correct Answer - B `y=3x+5rArr(dy)/(dt)=3(dx)/(dt)` `rArry-` coordinate charges at faster rate.

Discussion

48.	The equation of a curve is given as `y= x^(2) + 2-3x`. The curve intersects the x-axis atA. `(1, 0)`B. `(2, 0) `C. Both (1) and (2)D. No where
Answer» Correct Answer - 3 At x-axis, `y=0` so `x^(2)+2 -3x =0 rArr x =1 ` and 2 Therefore curve intersects the x-axis at (1, 0) and (2, 0).

Discussion

49.	Find the vector components of `veca= 2hati+ 3hatj` along the directions of `hati+hatj`.
Answer» Correct Answer - `(5)/(2) (hati+hatj)` Vector component of `veca` in the direction of `vecb(hati+hatj)` `" "=(acos theta ) vecb= ((abcos theta )/(b))(vecb)/(b) = (vecavecb)/(\|vecb\|^(2))vecb` `= ((2hati+3hatj)(hati+hatj))/([sqrt(1^(2)+1^(2))]^(2))(hati+hatj)` `= (2xx1+3xx1)/(2) (hati+hatj)= (5)/(2) (hati+hatj)`

Discussion

50.	Vectors `5hati+yhatj+hatk,2hati+2hatj-2hatk` and `-hati+2hatj+2hatk` are coplaner then find the value of y.
Answer» Condition of coplaner `veca(vecbxxvecc)=\|{:(a_(x),a_(y),a_(z)),(b_(x),b_(y),b_(z)):}\|=0rArr\|{:(2,2,-2),(5,y,1),(-1,2,2):}\|=0` `2(2y-2)-2(11)-2(10+y)=0rArr4y-4-22-20-2y=0rArr2y=46rArry=23`

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Give any one example of bidentate ligand.

Write IUPAC name of Diethyl ether.

When the capacitor is fully charged, work done by cell is w=n1 x CV2 the energy stored in the capacitor is U= n2 x CV2 and the heat produced across resistor is,

Assuming the earth to be a homogeneous sphere of radius `R`, its density in terms of `G` (constant of gravitation) and `g` (acceleration due to gravity on the surface of the earth)A. `3g//(4piRG)`B. `4pig//(3RG)`C. `4piRg//(3G)`D. `4piRG//(3g)`

The degree of freedom of a triatomic gas is?(a) 1(b) 2(c) 6(d) 8

If in a meter bridge experiment, the balancing length l was 25 cm for the situation shown in the figure. If the length and diameter of the of wire of resistance R is made half, then find the new balancing length in centimetre is

Two ideal di-atomic gases A and B. A is rigid, B has an extra degree of freedom due to vibration. Mass of A is m and mass of B is m/4. The ratio of molar specific heat of A to B at constant volume is : (1) 7/9(2) 5/9(3) 5/114) 5/7

How much it is required to convert 10 gram of ice at – 5° into steam at 100°C. Given specific heat of ice 2.1 J g-10 C-1. Latent heat of steam = 2268 J g-1 and latent hear of fusion of ice is 336 J/g. Specific heat of water = 4.2 J g-10 C-1.

An object is moving with acceleration but with uniform speed. Is it possible or no?

Write the dimensional formula for linear momentum.

What is unit vector?

Define radius of gyration.

The ultimate tensile strain in steel is in the range of1. 0.012 - 0.0202. 0.0012 - 0.00203. 0.12 - 0.204. 0.00012 - 0.00020

What is the weight of a body at the centre of the earth?

What is rigidity modulus of liquid?

Between steel and diamond, which is more elastic?

calculate the kinetic energy of a bullet of mass 0.0022kg moving with a velocity of 500m/s

For most materials the Young’s modulus is n times the rigidity modulus, where n is (a) 2 (b) 3 (c) 4 (d) 5

Young’s modulus of the wire depends on (a) length of the wire (b) diameter of the wire (c) material of the wire (d) mass hanging from the wire

Name the material which is famous for a large elastic after effect.

When wire is bent back and forth, it becomes hot. Why?

Why work is required to be done to stretch a wire?

Identify the type of modulus in twisting of cylinder.

A stone is dropped from top of a tower 100 m height. At the same instant another stone is thrown vertically upward from the base of the tower with the velocity of 25 m/s. When and where will the two stones meet? Given g = 10 m/s2.

A circular current carrying loop of radius R, carries a current l. The magnetic field at a point on the axis of coll is `(1)/(sqrt(8))` times the value of magnetic field at the centre. Distance of point from centre isA. `(R )/(sqrt(2))`B. `(R )/(sqrt(3))`C. `Rsqrt(2)`D. R

A positive charge q is projected in magnetic field of width `(mv)/(sqrt(2)qB)` with velocity v as shown in figure. Then time taken by charged particle to emerge from the magnetic field is A. `(m)/(sqrt(2)qB)`B. `(pim)/(4qB)`C. `(pim)/(2qB)`D. `(pim)/(sqrt(2)qB)`

A particle of charge q, mass m starts moving from origin under the action of an electric field `vec(E)=E_(0)hat(i)` magnetic field `vec(B)=B_(0)hat(k)`. Its velocity at `(x,0,0)` is `6hat(i)+8hat(j)`. The value of x isA. `(25m)/(qE_(0))`B. `(100m)/(qB_(0))`C. `(50m)/(qE_(0))`D. `(14m)/(qE_(0))`

The magnetic field at a point inside a 2.0 mH inductor coil becomes 0.80 of its maximum value in `20 mu s ` when the inducto is joined to a battery. Find the resistance of the circuit.A. `80 Omega`B. `320 Omega`C. `160 Omega`D. `40 Omega`

What are the neutral oxides of nitrogen?

What are the paramagnetic oxides of nitrogen?

Name the halides formed by nitrogen.

Why `+5` state is uncommon in bismuth.

Which element of group 15 undergoes sublimation?

Limitation of Coulomb’s Law.

Which of the following is NOT the property of equipotential surface? (i) They do not cross each other. (ii) The rate of change of potential with distance on them is zero. (iii) For a uniform electric field they are concentric spheres. (iv) They can be imaginary spheres.

The coordinates of a particle moving in XY-plane very with time as `x=4t^(2),y=2t`. The locus of the particle isA. Straight lineB. CircleC. ParabolaD. Ellipse

The kinetic energy of a particle of mass m moving with speed v is given by `K=(1)/(2)mv^(2)`. If the kinetic energy of a particle moving along x-axis varies with x as `K(x)=9-x^(2)`, then The region in which particle lies is :A. `x ge 9`B. `-3 le x le 3`C. `0 le x le 9`D. `-oo lt x lt oo`

If `3 cos theta+4 sin theta=A sin (theta+alpha)`, then values of A and `alpha ` areA. `5,cos ^(-1)((3)/(5))`B. `5, sin^(-1)((3)/(5))`C. `7, sin^(-1)((4)/(5))`D. None of these

The kinetic energy of a particle of mass m moving with speed v is given by `K=(1)/(2)mv^(2)`. If the kinetic energy of a particle moving along x-axis varies with x as `K(x)=9-x^(2)`, then The region in which particle lies is :A. `xge9`B. `-3lexxle3`C. `0lexxle9`D. `-ooltxxltoo`

A particle moves along the straight line `y=3x+5`. Which coordinate changes at faster rate?A. x-coordinateB. y-coordinateC. Both x and y coordinateD. Data insufficient.

The equation of a curve is given as `y= x^(2) + 2-3x`. The curve intersects the x-axis atA. `(1, 0)`B. `(2, 0) `C. Both (1) and (2)D. No where

Find the vector components of `veca= 2hati+ 3hatj` along the directions of `hati+hatj`.

Vectors `5hati+yhatj+hatk,2hati+2hatj-2hatk` and `-hati+2hatj+2hatk` are coplaner then find the value of y.