121- Ammonia Solvay process is an industry for manufacture of;
A. HNO3
B. Na2CO3
C. H2SO4
D. CaCO3
View Answer
Answer : B. Na2CO3
Description
122- The quantum number allows following orbitals in M shell.
A. s-orbital
B. s.p.d&f-orbitals
C. s&p orbitals
D. s.p&d orbitals
View Answer
Answer : D. s.p&d orbitals
Description
123- What different resistors are connected across the terminals of battery:
A. both emf and PD becomes zero
B. both emf and terminal PD changes
C. both emf and terminal PD remains the same
D. the emf remains the but PD changes
View Answer
Answer : D. the emf remains the but PD changes
Description
124- The minimum energy of pair production is:
A. 1.02 V
B. 1.02eV
C. 1.02 MeV
D. 1.02 GeV
View Answer
Answer : B. 1.02eV
Description
125- The mathematical equation representing faradays law is :
A. E=-NAG/At
B. E=NAl/At
C. E=AG/At
D. E=(AG) At
View Answer
Answer : A. E=-NAG/At
Description
126- The cyclist moves on circular track skids because :
A. the limiting friction is perpendicular to centripetal force
B. the limiting friction is greater than required centripetal force
C. limiting friction is opposite to centripetal force
D. the limiting friction is less than the required centripetal force
View Answer
Answer : D. the limiting friction is less than the required centripetal force
Description
127- A body is dropped from certain height and falls freely its velocity after 5 seconds will be :
A. 94 m/s
B. 9.4 m/s
C. 4.9 m/s
D. 49 m/s
View Answer
Answer : D. 49 m/s
Description
128- Two transverse travelling waves are presented by these equations yt=A-sin(kx-ek) and y2=A-sin(kx-ax-w) these two waves differ in :
A. amplitude
B. wavelength
C. phase
D. direction of propagation
View Answer
Answer : C. phase
Description
129- In equation E=ΔV/Δr negative sign indicates that :
A. E points towards increasing V
B. E points decreasing V
C. E is perpendicular to V
D. E is opposite to ΔV
View Answer
Answer : B. E points decreasing V
Description
130- The path of a neutron moving perpendicular to a magnetic field is:
A. curve
B. straight line
C. ellipse
D. parabola
View Answer
Answer : B. straight line
Description
131- A battery of emf E has an internal resistance “r”. If current “I” is drawn, then the terminal potential Vt is given by:
A. Vt = E + Ir
B. Vt = Er
C. Vt = E/I – r
D. Vt = E/I + r
View Answer
Answer : A. Vt = E + Ir
Description
132- The instantaneous emf generated by an alternating current generator is written as:
A. E = BINAsinωt
B. E = BNA sinωt
C. E = E0/BINA
D. E = BINA0
View Answer
Answer : B. E = BNA sinωt
Description
133- A bullet is fired horizontally at 20 m/s in the absence of air friction. Its horizontal velocity after 2 seconds is:
A. 10 m/s
B. 20 m/s
C. 40 m/s
D. 80 m/s
View Answer
Answer : B. 20 m/s
Description
134- If the Rydberg constant for hydrogen is RH, then the wavelength of a line in the Lyman series is:
A. 4RH / 3
B. RH / 4
C. 4 / RH
D. 4 / 3RH
View Answer
Answer : D. 4 / 3RH
Description
135- The ratio of the molar specific heat of a gas at constant pressure to its molar specific heat at constant volume is:
A. equals to zero
B. greater than one
C. less than one
D. equal to one
View Answer
Answer : B. greater than one
Description
136- If the mass and speed of a moving object are doubled, the kinetic energy (K.E) will be:
A. eight times
B. four times
C. doubled
D. sixteen times
View Answer
Answer : A. eight times
Description
137- The electric field intensity between two uniform, oppositely charged parallel plates is ?
A. ϵ°/2σ
B. σ/2ϵ°
C. 2σ/ϵ°
D. σ/ϵ°
View Answer
Answer : D. σ/ϵ°
Description
138- A box of mass M = 6 kg slides with speed V = 4 m/s across a frictionless floor. It suddenly explodes into two pieces. One piece with mass M1 = 2 kg moves in the same direction with speed v1 = 5 m/s. The velocity of the second piece is:
A. 1 m/s
B. 2 m/s
C. 4 m/s
D. 6 m/s
View Answer
Answer : C. 4 m/s
Description
139- The intensity level (sound level) of the faintest audible intensity is:
A. zero decibel
B. 140 decibel
C. 120 decibel
D. 60 decibel
View Answer
Answer : A. zero decibel
Description
140- If 2 µF capacitors are connected in series, their equivalent capacitance will be: