General Science - Online Test
Q1.
Based on VSEPR theory, the number of 90 degree F — Br — F angles in is
Answer : Option D
Explaination / Solution:
Steric no. of BrF5 is 6 so geometry is octahedral. It will have 5 bps and one lp which is present on axial position. Because of distortion caused by lp there is no 90o F—Br—F bond angle in BrF5 .
Q2. A straight wire carries a current of 50 A and the loop as in figure is moved to the right with a constant velocity, . Take a and assume that the loop has a large resistance. Induced emf in the loop at the instant when x = 0.2 m is
Answer : Option A
Explaination / Solution:
Q3. State the part of the electromagnetic spectrum to which 1057 MHz (frequency of radiation arising from two close energy levels in hydrogen; known as Lamb shift)..Belongs
Answer : Option B
Explaination / Solution:
No Explaination.
Q4. Earth is protected from ultra-violet radiations by means of
Answer : Option C
Explaination / Solution:
Ozone layer (stratospheric ozone) is a high concentration of ozone molecules about 30 to 50 km altitude (stratosphere). The main function of the ozone layer is to absorb the Sun's ultraviolet radiation, hence protecting the Earth from its harmful effects.
Q5. Which branched chain isomer of the hydrocarbon with molecular mass 72u gives only one isomer of mono substituted alkyl halide?
Answer : Option D
Explaination / Solution:
Neopentane has all same type of hydrogen and has molecular weight 72u
Q6. Lactic acid produced in muscle is sent to --------------------- to regenerate glucose.
Answer : Option A
Explaination / Solution:
Lactic acid is produced in muscle during insufficient oxygen in muscle cells. Lactic acid produced in muscle is sent to regenerate glucose during rest in presence of sufficient oxygen.
Q7. Laser printer uses
Answer : Option A
Explaination / Solution:
No Explaination.
Q8. Wavelength associated with a photon having energy 3.1eV is
Answer : Option A
Explaination / Solution:
λ(inA∘)=12375E(ineV)λ=123753.1≃4000A∘
Q9. Heating a pulverised mixture of limestone and clay in a rotary kiln is used in the manufacture of:
Answer : Option D
Explaination / Solution:
Heating a pulverised mixture of limestone and clay in a rotary kiln is used in the manufacture of Portland cement
Q10. baseband signal refers to the
Answer : Option A
Explaination / Solution:
No Explaination.
