Race : Fatigue :: Fast : ? a) Hunger b) Food c) Appetite d) None of the option
Option a) Hunger. Race causes fatigue and fast causes hunger.
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The pH value of decinormal solution of NH4OH, which is 20% ionised, is:
Concentration is 0.1 N in decinormal solution [OH−]=Cα=0.1×0.2M=0.02M pOH=−log[OH−]≈1.7 pH=14−pOH=12.3
A spring 40 mm long spring is stretched by applying a force. If 10 N force is required to stretch the spring through one mm, then work done in stretching the spring through 40 mm is :
Answer: F = 10 N x = 1mm = 0.001 Force contant ⇒\(\begin{array}{l}k=\frac{F}{x}\end{array} \) ⇒ \(\begin{array}{l}k=\frac{10}{0.001}= 10^{4}N/m\end{array} \) Now the... View Article
A diode detector is used to detect an amplitude modulated wave of 60% modulation by using a condenser of capacity 250pF in parallel with a load resistance 100 kilo ohm. Find the maximum modulated frequency which could be detected by it.
The frequency is given by: \(\begin{array}{l}f=\frac{1}{2\pi \mu \tau }\end{array} \) For a combination of resistance and capacitance is given by,... View Article
A vertical spring of force constant 100 N/m is attached with a hanging mass of 10 kg. Now an external force is applied on mass so that the spring is stretched (maximum) by additional 2 m. The work by the force F is (g=10m/s 2)
We know that work done is give by \(\begin{array}{l}W=\frac{1}{2}kx^{2}\end{array} \) \(\begin{array}{l}W=\frac{1}{2}100(2^{2})=200J\end{array} \)
A spy report about a suspected car reads as follows. “The car moved 2.00 km towards the east, made a perpendicular left turn, ran for 500 m, made a perpendicular right turn, ran for 4.00 km and stopped”. Find the displacement of the car.
Consider East direction is indicated as i west direction is indicated as −i North direction is indicated as j South... View Article
There are 50 students admitted to a nursery class. Some students can speak only English and some can speak only Hindi. Ten students can speak both English and Hindi. If the number of students who can speak English is 21, then how many students can speak Hindi, only Hindi and only English.
Total Number of students =50Number of students who can speak both English and Hindi =10Number of students who can speak Hindi=50−21=29+10=39Number of students... View Article
Ethylene is used for a) Retarding ripening of tomatoes b) slowing down the ripening of vegetables c) ripening of fruits d) slowing down the ripening of apples
Option c) ripening of fruits. Ethylene is a fruit ripening hormone mainly used for ripening fruits.
Relative density of mercury is
The relative density of mercury with respect to water is 13.56.
Range of vision of a normal human eye is from a) Infinity to 25 m b) Infinity to 25 cm c) 100 m to 25 cm d) 1 km to 25 cm
Option b) Infinity to 25 cm. The range of vision of a normal human eye ranges from infinity to 25... View Article
Which of the following is a copolymer a) Polyvinyl chloride (PVC) b) Nylon – 6,6 c) Natural rubber d) Polyethylene
Option b) Nylon – 6,6. Co-polymer is a polymer derived from more than one species of monomer.
Air is a ……………….. conductor of electricity a) Bad b) Good c) Neither Good nor Bad d) Both
Option a) Bad. Air is poor conductor of heat, since gases present in air does not aid in conduction of... View Article
Ultrasonic waves are produced by a) Piezoelectric effect b) Coulomb’s law c) Doppler’s effect d) Peltier’s effect
Option a) Piezoelectric effect.
Genetics is the study of a) Cell structure b) Only plants c) Inheritance d) Only animals
Option c) Inheritance.
How are acid rains produced
Acid rain is caused by the large-scale emission of acidic gases into the atmosphere from industries, thermal power plants, and... View Article
Androgens are secreted from a) Ovary and placenta b) Ovary and testes c) Only testis d) Testis and adrenal
Option d) Testis and adrenal. Androstenedione is an androgenic steroid produced by the ovaries, testes, and adrenal cortex.
Who hailed germany out from the situation of hyper inflation and how
Due to the war situation which prevailed in Germany, its treasury empty by giving war compensation. Germany had to face... View Article
Blood has been found to be isotonic with a) Saturated NaCl solution b) Saturated solution of a 1:1 mixture of NaCl and KCl c) Normal saline solution d) Saturated KCl solution
Option c) Normal saline solution. Normal saline is 0.16 M NaCl solution.
Which solution will exert highest osmotic pressure a) 1 M NaCl solution b) 1 M glucose solution c) 1 M alum solution d) 1 M urea solution
Option a) 1 M NaCl solution. The colligative ions in Nacl solution will exert the highest osmotic pressure due to... View Article
Socialism refers to a) Removal of the peasantry from administration b) Establishment of military dictatorship c) State-controlled economy d) liquidation of the bourgeoisie
Option c) State-controlled economy.
